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Pigtailed External Cavity (ECL) Single-Frequency Lasers, Butterfly Package

  • Narrow Linewidth, Single-Frequency Laser Diodes
  • 1550 nm Center Wavelength
  • Integrated TEC Element
  • FC/APC Terminated


ECL with SM Fiber


ECL with PM Fiber

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  • Output Centered at 1550 nm
  • External Cavity, Single-Frequency Design
  • Narrow 50 kHz Typical Linewidth with 45 dB Typical SMSR
  • SM or PM Fiber Output
  • FC/APC Connector, 2.0 mm Narrow Key
  • Industry-Standard Type 1 14-Pin Butterfly Package


  • Seed Laser
  • Laser Communications
  • Metrology
  • Nonlinear Frequency Doubling
  • Source Laser for LIDAR/Remote Sensing Systems

Thorlabs' External Cavity (ECL) Single-Frequency Laser Diodes deliver a narrow linewidth (50 kHz typical), single-frequency output with up to 40 mW of output power. Each external cavity, semiconductor laser is housed in a compact, 14-pin butterfly package, enabling compatibility with any standard 14-pin laser diode mount (Item # LM14S2). The single-frequency laser contains an integrated thermoelectric cooler (TEC), thermistor, and optical isolator with a single mode or polarization-maintaining output fiber with an FC/APC connector. These lasers do not have built-in monitor photodiodes and must be operated in constant current mode. For constant power mode operation, please see our TO-can, pigtailed, and butterfly laser diode offerings in the selection guide to the right for options with monitor photodiodes.

These ECL lasers are compatible with Thorlabs' line of laser diode drivers and temperature controllers. To achieve the narrowest possible linewidth, we recommend using a driver with low drive current noise, such as our LDC series of drivers.

While the SCLs are designed to provide high-power, single-frequency operation over a range of operating currents and temperatures, there are certain combinations where these lasers exhibit multimode operation. Proper temperature control and current tuning is needed to ensure single-frequency operation. To assist the user in selecting the appropriate operating conditions, a datasheet, which provides the operating characteristics and single-frequency regimes of that particular laser, is provided with each unit. For additional single frequency laser options, see our line of Distributed Bragg Reflector (DBR) lasers.

We recommend cleaning the fiber connector before each use if there is any chance that dust or other contaminants may have deposited on the surface. The laser intensity at the center of the fiber tip can be very high and may burn the tip of the fiber if contaminants are present. While the connectors on these pigtailed laser diodes are cleaned and capped before shipping, we cannot guarantee that they will remain free of contamination after they are removed from the package. For all of these pigtailed laser diodes, the laser must be off when connecting or disconnecting the device from other fibers, particularly when the power level is above 10 mW.

For warranty information, please refer to the LD Operation tab.

SFL1550 Series Single-Frequency Lasers

Symbol Min Typical Max
Center Wavelength λC 1549.5 nm 1550 nm 1550.5 nm
Linewidth Δν - 50 kHz 100 kHz
Side Mode Supression Ratio SMSR 40 dB 45 dB -
Optical Power @ IOP PO 25 mW 40 mW -
Forward Voltage @ IOP VF - 1.5 V 1.8 V
Operating Current IOP - 300 mA -
Threshold Current ITH - 50 mA -
Slope Efficiency ΔP/ΔI - 0.2 mW/mA -
Relative Intensity Noise RIN - -150 dB/Hz -
Single-Frequency Continuous Tuning Range (1 kHz rate) Δf - 3 GHz -
Operation Chip Temperature TCHIP - 25 °C -
Operation Case Temperature TCASE 10 °C - 60 °C
TEC Operation @ TCASE = 25 °C
TEC Current ITEC - 0.3 A -
TEC Voltage VTEC - 0.6 V -
Thermistor Resistance RTH - 10 kΩ -

Type 1 14 Pin Butterfly Pin Diagram

pin out diagram

Pin Identification
1 TEC + 14 TEC -
2 Thermistor 13 Case
3 NC 12 NC
4 NC 11 LD +
5 Thermistor 10 LD -
6 NC 9 NC
7 NC 8 NC

The plots below are typical, and performance will vary between individual lasers. Each SFL laser diode comes with individual performance plots.

Typical Characteristics: SFL1550 Series Lasers

SFL1550 Output Spectrum
Click to Enlarge

Grey shaded areas indicate regions of multimode operation.

SFL1550 Measured Linewidths
Click to Enlarge

For a Lorentzian lineshape, the measured delayed self-homodyne linewidth is exactly double the laser linewidth. To obtain a Lorentzian lineshape, an ultra-low noise current driver and TEC controller must be used.

SFL1550 Current Tuning
Click to Enlarge

To demonstrate single-frequency, continuous tuning, the outputs from two SFL1550 lasers were combined and the heterodyne beat frequency was measured on an RF spectrum analyzer.

ECL, DFB, VHG-Stabilized, and DBR Single-Frequency Lasers

ECL Laser Diagram
Click to Enlarge

Figure 1: ECL Lasers have a Grating Outside of the Gain Chip

A wide variety of applications require tunable single-frequency operation of a laser system. In the world of diode lasers, there are currently four main configurations to obtain a single-frequency output: external cavity laser (ECL), distributed feedback (DFB), volume holographic grating (VHG), and distributed Bragg reflector (DBR). All four are capable of single-frequency output through the utilization of grating feedback. However, each type of laser uses a different grating feedback configuration, which influences performance characteristics such as output power, tuning range, and side mode suppression ratio (SMSR). We discuss below some of the main differences between these four types of single-frequency diode lasers.

External Cavity Laser
The External Cavity Laser (ECL) is a versatile configuration that is compatible with most standard free space diode lasers. This means that the ECL can be used at a variety of wavelengths, dependent upon the internal laser diode gain element. A lens collimates the output of the diode, which is then incident upon a grating (see Figure 1). The grating provides optical feedback and is used to select the stabilized output wavelength. With proper optical design, the external cavity allows only a single longitudinal mode to lase, providing single-frequency laser output with high side mode suppression ratio (SMSR > 45 dB).

One of the main advantages of the ECL is that the relatively long cavity provides extremely narrow linewidths (<1 MHz). Additionally, since it can incorporate a variety of laser diodes, it remains one of the few configurations that can provide narrow linewidth emission at blue or red wavelengths. The ECL can have a large tuning range (>100 nm) but is often prone to mode hops, which are very dependent on the ECL's mechanical design as well as the quality of the antireflection (AR) coating on the laser diode.

DBR Laser Diagram
Click to Enlarge

Figure 2: DFB Lasers Have a Bragg Reflector Along the Length of the Active Gain Medium

Distributed Feedback Laser
The Distributed Feedback (DFB) Laser (available in NIR and MIR) incorporates the grating within the laser diode structure itself (see Figure 2). This corrugated periodic structure coupled closely to the active region acts as a Bragg reflector, selecting a single longitudinal mode as the lasing mode. If the active region has enough gain at frequencies near the Bragg frequency, an end reflector is unnecessary, relying instead upon the Bragg reflector for all optical feedback and mode selection. Due to this “built-in” selection, a DFB can achieve single-frequency operation over broad temperature and current ranges. To aid in mode selection and improve manufacturing yield, DFB lasers often utilize a phase shift section within the diode structure as well.

The lasing wavelength for a DFB is approximately equal to the Bragg wavelength:

DBR Equation

where λ is the wavelength, neff is the effective refractive index, and Λ is the grating period. By changing the effective index, the lasing wavelength can be tuned. This is accomplished through temperature and current tuning of the DFB.

The DFB has a relatively narrow tuning range: about 2 nm at 850 nm, about 4 nm at 1550 nm, or at least 1 cm-1 in the mid-IR (4.00 - 11.00 µm). However, over this tuning range, the DFB can achieve single-frequency operation, which means that this is a continuous tuning range without mode hops. Because of this feature, DFBs have become a popular and majority choice for real-world applications such as telecom and sensors. Since the cavity length of a DFB is rather short, the linewidths are typically in the 1 MHz to 10 MHz range. Additionally, the close coupling between the grating structure and the active region results in lower maximum output power compared to ECL and DBR lasers.

DBR Laser Diagram
Click to Enlarge

Figure 3: VHG Lasers have a Volume Holographic Grating Outside of the Active Gain Medium

Volume-Holographic-Grating-Stabilized Laser
A Volume-Holographic-Grating-(VHG)-Stabilized Laser also uses a Bragg reflector, but in this case a transmission grating is placed in front of the laser diode output (see Figure 3). Since the grating is not part of the laser diode structure, it can be thermally decoupled from the laser diode, improving the wavelength stability of the device. The grating typically consists of a piece of photorefractive material (typically glass) which has a periodic variation in the index of refraction. Only the wavelength of light that satisfies the Bragg condition for the grating is reflected back into the laser cavity, which results in a laser with extremely wavelength-stable emission. A VHG-Stabilized laser can produce output with a similar linewidth to a DFB laser at higher powers that is wavelength-locked over a wide range of currents and temperatures.

DBR Laser Diagram
Click to Enlarge

Figure 4: DBR Lasers have a Bragg Reflector Outside of the Active Gain Medium

Distributed Bragg Reflector Laser
Similar to DFBs, Distributed Bragg Reflector (DBR) lasers incorporate an internal grating structure. However, whereas DFB lasers incorporate the grating structure continuously along the active region (gain region), DBR lasers place the grating structure(s) outside this region (see Figure 4). In general a DBR can incorporate various regions not typically found in a DFB that yield greater control and tuning range. For instance, a multiple-electrode DBR laser can include a phase-controlled region that allows the user to independently tune the phase apart from the grating period and laser diode current. When utilized together, the DBR can provide single-frequency operation over a broad tuning range. For example, high end sample-grating DBR lasers can have a tuning range as large as 30 - 40 nm. Unlike the DFB, the output is not mode hop free; hence, careful control of all inputs and temperature must be maintained.

In contrast to the complicated control structure for the multiple-electrode DBR, a simplified version of the DBR is engineered with just one electrode. This single-electrode DBR eliminates the complications of grating and phase control at the cost of tuning range. For this architecture type, the tuning range is similar to a DFB laser but will mode hop as a function of the applied current and temperature. Despite the disadvantage of mode hops, the single-electrode DBR does provide some advantages over its DFB cousin, namely higher output power because the grating is not continuous along the length of the device. Both DBR and DFB lasers have similar laser linewidths. Currently, Thorlabs offers only single-electrode DBR lasers.

ECL, DFB, VHG, and DBR laser diodes provide single-frequency operation over their designed tuning range. The ECL can be designed for a larger selection of wavelengths than either the DFB or DBR. While prone to mode hops, it also provides the narrowest linewidth (<1 MHz) of the three choices. In appropriately designed instruments, ECLs can also provide extremely broad tuning ranges (>100 nm).

The DFB laser is the most stable single-frequency, tunable laser of the four. It can provide mode-hop-free performance over its entire tuning range (<5 nm), making it one of the most popular forms of single-frequency laser for much of industry. It has the lowest output power due to inherent properties of the continuous grating feedback structure.

The VHG laser provides the most stable wavelength performance over a range of temperatures and currents and can provide higher powers than are typical in DFB lasers. This stability makes it excellent for use in OEM applications.

The single-electrode DBR laser provides similar linewidth and tuning range as the DFB (<5 nm). However, the single-electrode DBR will have periodic mode hops in its tuning curve.

Laser Safety and Classification

Safe practices and proper usage of safety equipment should be taken into consideration when operating lasers. The eye is susceptible to injury, even from very low levels of laser light. Thorlabs offers a range of laser safety accessories that can be used to reduce the risk of accidents or injuries. Laser emission in the visible and near infrared spectral ranges has the greatest potential for retinal injury, as the cornea and lens are transparent to those wavelengths, and the lens can focus the laser energy onto the retina. 

Laser Glasses Blackout Materials Enclosure Systems
Laser Viewing Cards Alignment Tools Shutter and Controllers
Laser Safety Signs

Safe Practices and Light Safety Accessories

  • Thorlabs recommends the use of safety eyewear whenever working with laser beams with non-negligible powers (i.e., > Class 1) since metallic tools such as screwdrivers can accidentally redirect a beam.
  • Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections.
  • Goggles are marked with the wavelength range over which protection is afforded and the minimum optical density within that range.
  • Blackout Materials can prevent direct or reflected light from leaving the experimental setup area.
  • Thorlabs' Enclosure Systems can be used to contain optical setups to isolate or minimize laser hazards.
  • A fiber-pigtailed laser should always be turned off before connecting it to or disconnecting it from another fiber, especially when the laser is at power levels above 10 mW.
  • All beams should be terminated at the edge of the table, and laboratory doors should be closed whenever a laser is in use.
  • Do not place laser beams at eye level.
  • Carry out experiments on an optical table such that all laser beams travel horizontally.
  • Remove unnecessary reflective items such as reflective jewelry (e.g., rings, watches, etc.) while working near the beam path.
  • Be aware that lenses and other optical devices may reflect a portion of the incident beam from the front or rear surface.
  • Operate a laser at the minimum power necessary for any operation.
  • If possible, reduce the output power of a laser during alignment procedures.
  • Use beam shutters and filters to reduce the beam power.
  • Post appropriate warning signs or labels near laser setups or rooms.
  • Use a laser sign with a lightbox if operating Class 3R or 4 lasers (i.e., lasers requiring the use of a safety interlock).
  • Do not use Laser Viewing Cards in place of a proper Beam Trap.


Laser Classification

Lasers are categorized into different classes according to their ability to cause eye and other damage. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. The IEC document 60825-1 outlines the safety of laser products. A description of each class of laser is given below:

Class Description Warning Label
1 This class of laser is safe under all conditions of normal use, including use with optical instruments for intrabeam viewing. Lasers in this class do not emit radiation at levels that may cause injury during normal operation, and therefore the maximum permissible exposure (MPE) cannot be exceeded. Class 1 lasers can also include enclosed, high-power lasers where exposure to the radiation is not possible without opening or shutting down the laser.  Class 1
1M Class 1M lasers are safe except when used in conjunction with optical components such as telescopes and microscopes. Lasers belonging to this class emit large-diameter or divergent beams, and the MPE cannot normally be exceeded unless focusing or imaging optics are used to narrow the beam. However, if the beam is refocused, the hazard may be increased and the class may be changed accordingly.  Class 1M
2 Class 2 lasers, which are limited to 1 mW of visible continuous-wave radiation, are safe because the blink reflex will limit the exposure in the eye to 0.25 seconds. This category only applies to visible radiation (400 - 700 nm).  Class 2
2M Because of the blink reflex, this class of laser is classified as safe as long as the beam is not viewed through optical instruments. This laser class also applies to larger-diameter or diverging laser beams.  Class 2M
3R Lasers in this class are considered safe as long as they are handled with restricted beam viewing. The MPE can be exceeded with this class of laser, however, this presents a low risk level to injury. Visible, continuous-wave lasers are limited to 5 mW of output power in this class.  Class 3R
3B Class 3B lasers are hazardous to the eye if exposed directly. However, diffuse reflections are not harmful. Safe handling of devices in this class includes wearing protective eyewear where direct viewing of the laser beam may occur. In addition, laser safety signs lightboxes should be used with lasers that require a safety interlock so that the laser cannot be used without the safety light turning on. Class-3B lasers must be equipped with a key switch and a safety interlock.  Class 3B
4 This class of laser may cause damage to the skin, and also to the eye, even from the viewing of diffuse reflections. These hazards may also apply to indirect or non-specular reflections of the beam, even from apparently matte surfaces. Great care must be taken when handling these lasers. They also represent a fire risk, because they may ignite combustible material. Class 4 lasers must be equipped with a key switch and a safety interlock.  Class 4
All class 2 lasers (and higher) must display, in addition to the corresponding sign above, this triangular warning sign  Warning Symbol

Laser Diode and Laser Diode Pigtail Warranty

When operated within their specifications, laser diodes have extremely long lifetimes. However most failures occur from mishandling or operating the lasers beyond their maximum ratings. Laser Diodes are among the most static sensitive devices currently made. Since Thorlabs does not receive any warranty credit from our laser manufacturers we cannot guarantee the lasers after their sealed package has been open. Thorlabs will be happy to extend a full refund or credit for any lasers returned in their original sealed package.

Handling and Storage Precautions

Because of their extreme susceptibility to damage from electrostatic discharge (ESD), care should be taken whenever handling and operating laser diodes:

  • Wrist Straps: Use grounded anti-static wrist straps whenever handling diodes.
  • Anti-static Mats: Always work on grounded anti-static mats.
  • Storing Lasers: When not in use, short the leads of the laser together to protect against ESD damage.

Operating and Safety Precautions

Use an appropriate driver, laser diodes require precise control of operating current and voltage to avoid overdriving the lasers. In addition, the laser driver should provide protection against power supply transients. Select a laser driver appropriate for your application. Do not use a voltage supply with a current limiting resistor since it does not provide sufficient regulation to protect the laser.

  • Power Meters: When setting up and calibrating a laser with its driver, use a NIST-traceable power meter to precisely measure the laser output. It is usually safest to measure the laser output directly before placing the laser in an optical system. If this is not possible, be sure to take all optical losses (transmissive, aperture stopping, etc.) into consideration when determining the total output of the laser.
  • Reflections: Flat surfaces in the optical system in front of a laser diode can cause some of the laser energy to reflect back onto the laser’s monitor photodiode giving an erroneously high photodiode current. If optical components are moved within the system and energy is no longer reflected onto the monitor photodiode, a constant power feedback loop will sense the drop in photodiode current and try to compensate by increasing the laser drive current and possibly overdriving the laser. Back reflections can also cause other malfunctions or damage to laser diodes. To avoid this, be sure that all surfaces are angled 5-10° and when necessary, use optical isolators to attenuate direct feedback into the laser.
  • Heat Sinks: Laser lifetime is inversely proportional to operating temperature. Always mount the laser in a suitable heat sink to remove excess heat from the laser package.
  • Voltage and Current Overdrive: Be careful not to exceed the maximum voltage and currents even momentarily. Also, reverse voltages as little as 3 V can damage a laser diode.
  • ESD Sensitive Device: Even when a laser is operating it is susceptible to ESD damage. This is particularly aggravated by using long interface cables between the laser and its driver due to the inductance that the cable presents. Avoid exposing the laser or its mounting apparatus to ESDs at all times.
  • ON/OFF and Power Supply Coupled Transients: Because of their fast response times, laser diodes can be easily damaged by transients less than 1 µs. High current devices such as soldering irons, vacuum pumps, fluorescent lamps, etc., can cause large momentary transients; use surge-protected outlets.

If you have any questions regarding laser diodes, please call your local Thorlabs Technical Support office for assistance.

Posted Comments:
Xiaoguang Sun  (posted 2019-03-18 08:15:31.74)
I have an SFL1550P, SN SFL 10901. I lost the measured data with the laser, can you send it to me?
YLohia  (posted 2019-04-08 11:01:18.0)
Hello, you can request serialized spec sheets for our laser diodes by emailing us at We have reached out to you directly with this information.
akg  (posted 2018-08-30 03:13:19.953)
Dear Thorlabs, I am looking for a Laser Diode at 1550nm. I have to operate it in CW mode without any modulation (I will use external modulation). However I need extremely narrow line-width as I intend to use in interferometry application for Quantum Key Distribution. I don't require wavelength tunability. Will SFL1550S be a good fit there and you suggest a better laser diode from Thorlabs. I am not interested in high optical power. Sincerely, Atul
YLohia  (posted 2018-09-17 10:29:37.0)
Dear Atul, thank you for contacting Thorlabs. The SFL1550S will be the best fit as a single laser diode that we currently offer. We do, however, also sell the TLX1 benchtop source which is a tunable laser that covers the 1528 - 1566nm range. The typical linewidth here is 10kHz.
xhyang  (posted 2018-04-25 08:46:33.46)
带尾纤的外腔(ECL)单频激光器,蝶形封装 上述产品的频率稳定性如何,如每天或每小时的频率漂移范围
YLohia  (posted 2018-05-02 08:44:40.0)
Hello, thank you for contacting Thorlabs. Unfortunately, we do not have this type of reliability data outside of what is given in the manual. The stability mostly depends on the mounting and drive conditions and is generally a system-level spec. Wavelength will drift with current and, to a greater extent, with the temperature. The tuning coefficients are given in the manual. The achievable linewidth will also depend on the noise of the current source. The system should be isolated from temperature changes, vibrations, etc. for optimal performance.
Timohodik  (posted 2018-02-06 09:40:46.853)
Dear Thorlabs, Could you please provide information on lifetime in hours for SFL1550P and CLD1015? In the case of by-the-book operation, of course. Sincerely yours, Timophey
YLohia  (posted 2018-02-26 09:10:42.0)
Hello Timophey, thank you for contacting Thorlabs. While we have not performed any rigorous lifetime testing on the fully packaged laser SFL1550P, the component InP laser chip is very robust and advanced aging studies have estimated the chip lifetime at tens of years of continuous use before failure or degradation under normal operating conditions. In addition, we have had hundreds of units of SFL1550P in the field over the past several years without signs of failure or a high rates of return. Long-term performance may depend on environmental conditions. Unfortunately, we currently do not have the lifetime information/testing for CLD1015. We do, however, anticipate a high durability with this unit due to the very low percentage of RMAs processed since the release of this item in 2012.
bsvikram  (posted 2017-05-23 01:10:11.363)
Hi, We wanted to know the highest frequency at which SFL1550S can be current modulated and whether this can be done with CLD 1015 mount. We would like to modulate the current at least at few MHz.
nbayconich  (posted 2017-06-16 08:13:21.0)
Thank you for contacting Thorlabs. The SFL1550S ECL laser diode can be directly modulated up to 10 Mhz but the CLD1015 can only directly modulate a butterfly laser diode package up to 250Khz at 3 dB. Modulating at high frequencies can change the frequency spectrum of the diode but a few Mhz should not change the spectrum. Another way to modulate the SFL1550S ECL is to use an external modulator. A Techsupport representative will contact you directly with more information.
kkmion  (posted 2016-09-16 17:07:39.433)
can you supply the Pigtailed External Cavity (ECL) Single-Frequency Lasers at wavelength of 1064 nm?
jlow  (posted 2016-09-20 02:22:59.0)
Response from Jeremy at Thorlabs: I will contact you directly to discuss about this quote.
zsolt.kis1  (posted 2015-09-08 06:17:48.063)
Dear Thorlabs, I would like to use the SFL1150P diode laser in a pulsed mode with an appropriate driver. The driver I would use is capable to modulate the laser current up to 50MHz. My idea is to modulate the laser current between just below the laser threshold and at some current above the threshold, hence I want to create pulses in this way. The pulse width is supposed to be 100-200 ns. What is the response of your laser to such driving ? Best Regards, Zsolt Kis HAS Wigner RCP
jlow  (posted 2015-09-18 11:11:19.0)
Response from Jeremy at Thorlabs: We have a section in the manual (Section 3.4) discussing about the frequency modulation bandwidth. We will contact you directly to provide more information on this.
matthias  (posted 2014-10-15 19:29:21.68)
Hi. Can you produce a version of the SFL1550P with a center wavelength of 1560 nm?
jlow  (posted 2014-10-16 01:30:24.0)
Response from Jeremy at Thorlabs: We can quote this and we will contact you directly for the quote. You can also send RFQ to
pejr  (posted 2014-08-14 16:28:01.177)
Hi. Is the Thorlabs' External Cavity (ECL) Single-Frequency Laser Diode at a custom wavelength of 780.0 nm or 785.0 nm possible? Linewidth of <100 kHz to 500 kHz (@10 millisecond measurement time) is also required. Desired output power >35 mW.
jlow  (posted 2014-08-19 11:36:13.0)
Response from Jeremy at Thorlabs: We do not have the SFL for 780nm range in a butterfly package at the moment. We do have the TLK-L780M which might be suitable for your application. We will contact directly to discuss about this.
hallt  (posted 2013-08-07 12:59:58.073)
Hi. I would like a very very low intensity noise laser. I was thinking of using your SFL1550S with the CLD1015 controller as you suggest. Could you give me an idea of how much noise I could expect over a 100 kHz-100 MHz using this configuration? thanks.
tschalk  (posted 2013-08-09 07:57:00.0)
This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. We specify the noise and ripple of the CLD1015 with 30µA without noise reduction filter and 15µA with noise reduction filter (10Hz to 10MHz, RMS). A better solution for low noise applications would be an LDC2xxC, which can be found here: The LDC205C, for example, delivers 500mA laser current and the noise without ripple is <3µA (10Hz to 10MHz, RMS) and the ripple is <2µA (50/60Hz, RMS). I will contact you with more detailed information.

The rows shaded green below denote single-frequency lasers.

Item #WavelengthOutput
L375P70MLD375 nm70 mW110 mA5.4 V22.5°Single ModeØ5.6 mm
L404P400M404 nm400 mW370 mA4.9 V13° (1/e2)42° (1/e2)MultimodeØ5.6 mm
LP405-SF10405 nm10 mW50 mA5.0 V--Single ModeØ5.6 mm, SM Pigtail
L405P20405 nm20 mW38 mA4.8 V8.5°19°Single ModeØ5.6 mm
L405G2405 nm35 mW50 mA4.9 V10°21°Single ModeØ3.8 mm
DL5146-101S405 nm40 mW70 mA5.2 V19°Single ModeØ5.6 mm
L405P150405 nm150 mW138 mA4.9 VSingle ModeØ3.8 mm
LP405-MF300405 nm300 mW350 mA4.5 V--MultimodeØ5.6 mm, MM Pigtail
L405G1405 nm1000 mW900 mA5.0 V13°45°MultimodeØ9 mm
L450G1447 nm3000 mW2000 mA5.2 V30°MultimodeØ9 mm
LP450-SF15450 nm15 mW85 mA5.5 V--Single ModeØ9 mm, SM Pigtail
PL450B450 nm80 mW100 mA5.8 V4 - 11°18 - 25°Single ModeØ3.8 mm
L450P1600MM450 nm1600 mW1200 mA4.8 V19 - 27°MultimodeØ5.6 mm
L473P100473 nm100 mW120 mA5.7 V1024Single ModeØ5.6 mm
LP488-SF20488 nm20 mW70 mA6.0 V--Single ModeØ5.6 mm, SM Pigtail
L488P60488 nm60 mW75 mA6.8 V23°Single ModeØ5.6 mm
L515A1515 nm10 mW50 mA5.4 V6.5°21°Single ModeØ5.6 mm
LP520-SF15520 nm15 mW140 mA6.5 V--Single ModeØ9 mm, SM Pigtail
L520P50520 nm45 mW150 mA7.0 V22°Single ModeØ5.6 mm
PL520520 nm50 mW150 mA7.0 V22°Single ModeØ3.8 mm
DJ532-10532 nm10 mW220 mA1.9 V0.69°0.69°Single ModeØ9.5 mm (non-standard)
DJ532-40532 nm40 mW330 mA1.9 V0.69°0.69°Single ModeØ9.5 mm (non-standard)
LP633-SF50633 nm50 mW170 mA2.6 V--Single ModeØ5.6 mm, SM Pigtail
HL63163DG633 nm100 mW170 mA2.6 V8.5°18°Single ModeØ5.6 mm
LPS-635-FC635 nm2.5 mW70 mA2.2 V--Single ModeØ9.5 mm, SM Pigtail
LPS-PM635-FC635 nm2.5 mW70 mA2.2 V--Single ModeØ9.5 mm, PM Pigtail
L635P5635 nm5 mW30 mA<2.7 V32°Single ModeØ5.6 mm
HL6312G635 nm5 mW55 mA<2.7 V31°Single ModeØ9 mm
LPM-635-SMA635 nm8 mW50 mA2.2 V--MultimodeØ9 mm, MM Pigtail
LP635-SF8635 nm8 mW60 mA2.3 V--Single ModeØ5.6 mm, SM Pigtail
HL6320G635 nm10 mW70 mA<2.7 V31°Single ModeØ9 mm
HL6322G635 nm15 mW85 mA<2.7 V30°Single ModeØ9 mm
L637P5637 nm5 mW20 mA<2.4 V34°Single ModeØ5.6 mm
LP637-SF50637 nm50 mW140 mA2.6 V--Single ModeØ5.6 mm, SM Pigtail
LP637-SF70637 nm70 mW220 mA2.7 V--Single ModeØ5.6 mm, SM Pigtail
HL63142DG637 nm100 mW140 mA2.7 V18°Single ModeØ5.6 mm
HL63133DG637 nm170 mW250 mA2.8 V17°Single ModeØ5.6 mm
HL6388MG637 nm250 mW340 mA2.3 V10°40°MultimodeØ5.6 mm
L638P040638 nm40 mW92 mA2.4 V10°21°Single ModeØ5.6 mm
L638P150638 nm150 mW230 mA2.7 V918Single ModeØ3.8 mm
L638P200638 nm200 mW280 mA2.9 V814Single ModeØ5.6 mm
L638P700M638 nm700 mW820 mA2.2 V35°MultimodeØ5.6 mm
HL6358MG639 nm10 mW40 mA2.3 V21°Single ModeØ5.6 mm
HL6323MG639 nm30 mW95 mA2.3 V8.5°30°Single ModeØ5.6 mm
HL6362MG640 nm40 mW90 mA2.4 V10°21°Single ModeØ5.6 mm
LP642-SF20642 nm20 mW90 mA2.5 V--Single ModeØ5.6 mm, SM Pigtail
LP642-PF20642 nm20 mW90 mA2.5 V--Single ModeØ5.6 mm, PM Pigtail
HL6364DG642 nm60 mW125 mA2.5 V10°21°Single ModeØ5.6 mm
HL6366DG642 nm80 mW155 mA2.5 V10°21°Single ModeØ5.6 mm
HL6385DG642 nm150 mW280 mA2.6 V17°Single ModeØ5.6 mm
L650P007650 nm7 mW28 mA2.2 V28°Single ModeØ5.6 mm
LPS-660-FC658 nm7.5 mW65 mA2.6 V--Single ModeØ5.6 mm, SM Pigtail
LP660-SF20658 nm20 mW80 mA2.6 V--Single ModeØ5.6 mm, SM Pigtail
LPM-660-SMA658 nm22.5 mW65 mA2.6 V--MultimodeØ5.6 mm, MM Pigtail
HL6501MG658 nm30 mW65 mA2.6 V8.5°22°Single ModeØ5.6 mm
L658P040658 nm40 mW75 mA2.2 V10°20°Single ModeØ5.6 mm
LP660-SF40658 nm40 mW135 mA2.5 V--Single ModeØ5.6 mm, SM Pigtail
LP660-SF60658 nm60 mW210 mA2.4 V--Single ModeØ5.6 mm, SM Pigtail
HL6544FM660 nm50 mW115 mA2.3 V10°17°Single ModeØ5.6 mm
LP660-SF50660 nm50 mW140 mA2.3 V--Single ModeØ5.6 mm, SM Pigtail
HL6545MG660 nm120 mW170 mA2.45 V10°17°Single ModeØ5.6 mm
L660P120660 nm120 mW175 mA2.5 V10°17°Single ModeØ5.6 mm
LPS-675-FC670 nm2.5 mW55 mA2.2 V--Single ModeØ9 mm, SM Pigtail
HL6748MG670 nm10 mW30 mA2.2 V25°Single ModeØ5.6 mm
HL6714G670 nm10 mW55 mA<2.7 V22°Single ModeØ9 mm
HL6756MG670 nm15 mW35 mA2.3 V24°Single ModeØ5.6 mm
SLD1332V670 nm500 mW800 mA2.4 V23°MultimodeØ9 mm
LP685-SF15685 nm15 mW55 mA2.1 V--Single ModeØ5.6 mm, SM Pigtail
HL6750MG685 nm50 mW75 mA2.3 V21°Single ModeØ5.6 mm
HL6738MG690 nm30 mW90 mA2.5 V8.5°19°Single ModeØ5.6 mm
LP705-SF15705 nm15 mW55 mA2.3 V--Single ModeØ5.6 mm, SM Pigtail
HL7001MG705 nm40 mW75 mA2.5 V18°Single ModeØ5.6 mm
HL7302MG730 nm40 mW75 mA2.5 V18°Single ModeØ5.6 mm
DBR760PN761 nm9 mW125 mA2.0 V--Single FrequencyButterfly, PM Pigtail
L780P010780 nm10 mW24 mA1.8 V30°Single ModeØ5.6 mm
LP780-SAD15780 nm15 mW180 mA2.2 V--Single FrequencyØ9 mm, SM Pigtail
DBR780PN781 nm45 mW250 mA1.9 V--Single FrequencyButterfly, PM Pigtail
L785P5785 nm5 mW28 mA1.9 V10°29°Single ModeØ5.6 mm
LPS-PM785-FC785 nm6.25 mW65 mA---Single ModeØ5.6 mm, PM Pigtail
LPS-785-FC785 nm10 mW65 mA1.85 V--Single ModeØ5.6 mm, SM Pigtail
LP785-SF20785 nm20 mW85 mA1.9 V--Single ModeØ5.6 mm, SM Pigtail
DBR785S785 nm25 mW230 mA2.0 V--Single FrequencyButterfly, SM Pigtail
DBR785P785 nm25 mW230 mA2.0 V--Single FrequencyButterfly, PM Pigtail
L785P25785 nm25 mW45 mA1.9 V30°Single ModeØ5.6 mm
FPV785S785 nm50 mW410 mA2.2 V--Single FrequencyButterfly, SM Pigtail
LP785-SAV50785 nm50 mW500 mA2.2 V--Single FrequencyØ9 mm, SM Pigtail
L785P090785 nm90 mW120 mA2.0 V16°Single ModeØ5.6 mm
LP785-SF100785 nm100 mW300 mA2.0 V--Single ModeØ9 mm, SM Pigtail
L785H1785 nm200 mW220 mA2.5 V8.5°16°Single ModeØ5.6 mm
FPL785S-250785 nm250 mW (Min)500 mA2.0 V--Single ModeButterfly, SM Pigtail
LD785-SEV300785 nm300 mW500 mA (Max)2.0 V16°Single FrequencyØ9 mm
LD785-SH300785 nm300 mW400 mA2.0 V18°Single ModeØ9 mm
FPL785C785 nm300 mW400 mA2.0 V18°Single Mode3 mm x 5 mm Submount
LD785-SE400785 nm400 mW550 mA2.0 V16°Single ModeØ9 mm
ML620G40805 nm500 mW650 mA1.9 V34°MultimodeØ5.6 mm
L808P010808 nm10 mW50 mA2 V10°30°Single ModeØ5.6 mm
L808P030808 nm30 mW65 mA2 V10°30°Single ModeØ5.6 mm
M9-808-0150808 nm150 mW180 mA1.9 V17°Single ModeØ9 mm
L808P200808 nm200 mW260 mA2 V10°30°MultimodeØ5.6 mm
LD808-SEV500808 nm500 mW800 mA (Max)2.2 V14°Single FrequencyØ9 mm
FPL808S808 nm200 mW750 mA2.3 V--Single ModeButterfly, SM Pigtail
LD808-SE500808 nm500 mW750 mA2.2 V14°Single ModeØ9 mm
L808P500MM808 nm500 mW650 mA1.8 V12°30°MultimodeØ5.6 mm
L808P1000MM808 nm1000 mW1100 mA2 V30°MultimodeØ9 mm
LP820-SF80820 nm80 mW230 mA2.3 V--Single ModeØ5.6 mm, SM Pigtail
L820P100820 nm100 mW145 mA2.1 V17°Single ModeØ5.6 mm
L820P200820 nm200 mW250 mA2.4 V17°Single ModeØ5.6 mm
DBR828PN828 nm24 mW250 mA2.0 V--Single FrequencyButterfly, PM Pigtail
LPS-830-FC830 nm10 mW120 mA---Single ModeØ5.6 mm, SM Pigtail
LPS-PM830-FC830 nm10 mW120 mA---Single ModeØ5.6 mm, PM Pigtail
LP830-SF30830 nm30 mW115 mA1.9 V--Single ModeØ9 mm, SM Pigtail
HL8338MG830 nm50 mW75 mA1.9 V22°Single ModeØ5.6 mm
FPL830S830 nm350 mW900 mA2.5 V--Single ModeButterfly, SM Pigtail
LD830-SE650830 nm650 mW900 mA2.3 V13°Single ModeØ9 mm
LD830-MA1W830 nm1 W1.330 A2.1 V24°MultimodeØ9 mm
LD830-ME2W830 nm2 W3 A (Max)2.0 V21°MultimodeØ9 mm
L840P200840 nm200 mW255 mA2.4 V917Single ModeØ5.6 mm
L850P010850 nm10 mW50 mA2 V10°30°Single ModeØ5.6 mm
L850P030850 nm30 mW65 mA2 V8.5°30°Single ModeØ5.6 mm
LP850-SF80850 nm80 mW230 mA2.3 V--Single ModeØ5.6 mm, SM Pigtail
L850P200850 nm200 mW255 mA2.4 V917Single ModeØ5.6 mm
FPV852S852 nm20 mW400 mA2.2 V--Single FrequencyButterfly, SM Pigtail
DBR852PN852 nm24 mW300 mA2.0 V--Single FrequencyButterfly, PM Pigtail
LP852-SF30852 nm30 mW115 mA1.9 V--Single ModeØ9 mm, SM Pigtail
L852P50852 nm50 mW75 mA1.9 V22°Single ModeØ5.6 mm
L852P100852 nm100 mW120 mA1.9 V28°Single ModeØ9 mm
L852P150852 nm150 mW170 mA1.9 V18°Single ModeØ9 mm
FPL852S852 nm350 mW900 mA2.5 V--Single ModeButterfly, SM Pigtail
LD852-SE600852 nm600 mW950 mA2.3 V7° (1/e2)13° (1/e2)Single ModeØ9 mm
LD852-SEV600852 nm600 mW1050 mA (Max)2.2 V13° (1/e2)Single FrequencyØ9 mm
LP880-SF3880 nm3 mW25 mA2.2 V--Single ModeØ5.6 mm, SM Pigtail
L880P010880 nm10 mW30 mA2.0 V12°37°Single ModeØ5.6 mm
L904P010904 nm10 mW50 mA2 V10°30°Single ModeØ5.6 mm
LP915-SF40915 nm40 mW130 mA1.5 V--Single ModeØ9 mm, SM Pigtail
M9-915-0300915 nm300 mW370 mA1.9 V28°Single ModeØ9 mm
LP940-SF30940 nm30 mW90 mA1.5 V--Single ModeØ9 mm, SM Pigtail
M9-940-0200940 nm200 mW270 mA1.9 V28°Single ModeØ9 mm
FPV976S976 nm30 mW400 mA (Max)2.2 V--Single FrequencyButterfly, SM Pigtail
DBR976PN976 nm33 mW450 mA2.0 V--Single FrequencyButterfly, PM Pigtail
DBR976S976 nm50 mW150 mA2.0 V--Single FrequencyButterfly, SM Pigtail
BL976-SAG300976 nm300 mW470 mA2.0 V--Single ModeButterfly, SM Pigtail
BL976-PAG500976 nm500 mW830 mA2.0 V--Single ModeButterfly, PM Pigtail
BL976-PAG700976 nm700 mW1090 mA2.0 V--Single ModeButterfly, PM Pigtail
BL976-PAG900976 nm900 mW1480 mA2.5 V--Single ModeButterfly, PM Pigtail
L980P010980 nm10 mW25 mA2 V10°30°Single ModeØ5.6 mm
LP980-SF15980 nm15 mW70 mA1.5 V--Single ModeØ5.6 mm, SM Pigtail
L980P030980 nm30 mW100 mA1.5 V10°30°Single ModeØ5.6 mm
L9805E2P5980 nm50 mW95 mA1.5 V33°Single ModeØ5.6 mm
L980P100A980 nm100 mW150 mA1.6 V32°MultimodeØ5.6 mm
L980P200980 nm200 mW300 mA1.5 V30°MultimodeØ5.6 mm
L1060P200J1060 nm200 mW280 mA1.3 V32°Single ModeØ9 mm
DBR1064S1064 nm40 mW150 mA2.0 V--Single FrequencyButterfly, SM Pigtail
DBR1064P1064 nm40 mW150 mA2.0 V--Single FrequencyButterfly, PM Pigtail
DBR1064PN1064 nm110 mW550 mA2.0 V--Single FrequencyButterfly, PM Pigtail
LPS-1060-FC1064 nm50 mW220 mA1.4 V--Single ModeØ9 mm, SM Pigtail
M9-A64-02001064 nm200 mW280 mA1.7 V28°Single ModeØ9 mm
M9-A64-03001064 nm300 mW390 mA1.7 V28°Single ModeØ9 mm
LP1310-SAD21310 nm2.0 mW40 mA1.1 V--Single FrequencyØ5.6 mm, SM Pigtail
LPS-1310-FC1310 nm2.5 mW20 mA1.1 V--Single ModeØ5.6 mm, SM Pigtail
LPS-PM1310-FC1310 nm2.5 mW20 mA1.1 V--Single ModeØ5.6 mm, PM Pigtail
L1310P5DFB1310 nm5 mW20 mA1.1 VSingle FrequencyØ5.6 mm
ML725B8F1310 nm5 mW20 mA1.1 V25°30°Single ModeØ5.6 mm
LPSC-1310-FC1310 nm50 mW350 mA2 V--Single ModeØ5.6 mm, SM Pigtail
FPL1053S1310 nm130 mW400 mA1.7 V--Single ModeButterfly, SM Pigtail
FPL1053P1310 nm130 mW400 mA1.7 V--Single ModeButterfly, PM Pigtail
FPL1053T1310 nm300 mW (Pulsed)750 mA2 V15°28°Single ModeØ5.6 mm
FPL1053C1310 nm300 mW (Pulsed)750 mA2 V15°27°Single ModeChip on Submount
L1310G11310 nm2000 mW5 A1.5 V24°MultimodeØ9 mm
L1370G11370 nm2000 mW5 A1.4 V22°MultimodeØ9 mm
L1450G11450 nm2000 mW5 A1.4 V22°MultimodeØ9 mm
L1480G11480 nm2000 mW5 A1.6 V20°MultimodeØ9 mm
LPS-1550-FC1550 nm1.5 mW30 mA1.0 V--Single ModeØ5.6 mm, SM Pigtail
LPS-PM1550-FC1550 nm1.5 mW30 mA1.1 V--Single ModeØ5.6 mm, SM Pigtail
LP1550-SAD21550 nm2.0 mW40 mA1.0 V--Single FrequencyØ5.6 mm, SM Pigtail
L1550P5DFB1550 nm5 mW20 mA1.1 V10°Single FrequencyØ5.6 mm
ML925B45F1550 nm5 mW30 mA1.1 V25°30°Single ModeØ5.6 mm
SFL1550S1550 nm40 mW300 mA1.5 V--Single FrequencyButterfly, SM Pigtail
SFL1550P1550 nm40 mW300 mA1.5 V--Single FrequencyButterfly, PM Pigtail
LPSC-1550-FC1550 nm50 mW250 mA2 V--Single ModeØ5.6 mm, SM Pigtail
FPL1009S1550 nm100 mW400 mA1.4 V--Single ModeButterfly, SM Pigtail
FPL1009P1550 nm100 mW400 mA1.4 V--Single ModeButterfly, PM Pigtail
FPL1001C1550 nm150 mW400 mA1.4 V18°31°Single ModeChip on Submount
FPL1055T1550 nm300 mW (Pulsed)750 mA2 V15°28°Single ModeØ5.6 mm
FPL1055C1550 nm300 mW (Pulsed)750 mA2 V15°28°Single ModeChip on Submount
L1550G11550 nm1700 mW5 A1.5 V28°MultimodeØ9 mm
L1575G11575 nm1700 mW5 A1.5 V28°MultimodeØ9 mm
LPSC-1625-FC1625 nm50 mW350 mA1.5 V--Single ModeØ5.6 mm, SM Pigtail
FPL1054S1625 nm80 mW400 mA1.7 V--Single ModeButterfly, SM Pigtail
FPL1054P1625 nm80 mW400 mA1.7 V--Single ModeButterfly, PM Pigtail
FPL1054C1625 nm250 mW (Pulsed)750 mA2 V15°28°Single ModeChip on Submount
FPL1054T1625 nm250 mW (Pulsed)750 mA2 V15°28°Single ModeØ5.6 mm
FPL1059S1650 nm80 mW400 mA1.7 V--Single ModeButterfly, SM Pigtail
FPL1059P1650 nm80 mW400 mA1.7 V--Single ModeButterfly, PM Pigtail
FPL1059C1650 nm225 mW (Pulsed)750 mA2 V15°28°Single ModeChip on Submount
FPL1059T1650 nm225 mW (Pulsed)750 mA2 V15°28°Single ModeØ5.6 mm
FPL1940S1940 nm15 mW400 mA2 V--Single ModeButterfly, SM Pigtail
FPL2000S2 µm15 mW400 mA2 V--Single ModeButterfly, SM Pigtail
FPL2000C2 µm30 mW400 mA5.2 V19°Single ModeChip on Submount
QD4500CM14.00 - 5.00 µm (DFB)40 mW<500 mA10.5 V30°40°Single FrequencyTwo-Tab C-Mount
QF4050D24.05 µm (FP)800 mW750 mA13 V30°40°Single ModeD-Mount
QF4050D34.05 µm (FP)1200 mW1000 mA13 V30°40°Single ModeD-Mount
QF4400CM14.40 µm (FP)500 mW1020 mA10.7 V26°53°Single ModeTwo-Tab C-Mount
QD4580CM14.54 - 4.62 µm (DFB)40 mW<600 mA10.5 V50°30°Single FrequencyTwo-Tab C-Mount
QF4550CM14.55 µm (FP)450 mW900 mA10.5 V30°55°Single ModeTwo-Tab C-Mount
QF4600T14.60 µm (FP)400 mW800 mA12.0 V40°30°Single ModeØ9 mm
QF4800CM14.80 µm (FP)500 mW850 mA15.5 V33°53°Single ModeTwo-Tab C-Mount
QD5500CM15.00 - 8.00 µm (DFB)40 mW<700 mA9.5 V30 °45 °Single FrequencyTwo-Tab C-Mount
QD5250CM15.20 - 5.30 µm (DFB)120 mW<660 mA10.2 V41°52°Single FrequencyTwo-Tab C-Mount
QF5300CM15.30 µm (FP)150 mW1200 mA9.0 V30°55°Single ModeTwo-Tab C-Mount
QD6500CM16.00 - 7.00 µm (DFB)40 mW<650 mA10 V35 °50 °Single FrequencyTwo-Tab C-Mount
QF7200CM17.20 µm (FP)250 mW1300 mA8.5 V35°65°Single ModeTwo-Tab C-Mount
QD7500CM17.00 - 8.00 µm (DFB)40 mW<600 mA10 V40°50°Single FrequencyTwo-Tab C-Mount
QD7500DM17.00 - 8.00 µm (DFB)100 mW<600 mA11.5 V40°55°Single FrequencyD-Mount
QF7700CM17.70 µm (FP)250 mW1100 mA7.8 V37°65°Single ModeTwo-Tab C-Mount
QD7950CM17.90 - 8.00 µm (DFB)100 mW<1000 mA9.5 V55°70°Single FrequencyTwo-Tab C-Mount
QD8050CM18.00 - 8.10 µm (DFB)100 mW<1000 mA9.5 V55°70°Single FrequencyTwo-Tab C-Mount
QD8500CM18.00 - 9.00 µm (DFB)100 mW<900 mA9.5 V40 °55 °Single FrequencyTwo-Tab C-Mount
QD8500HHLH8.00 - 9.00 µm (DFB)100 mW<600 mA10.2 V--Single FrequencyHorizontal HHL
QF8350CM18.55 µm (FP)300 mW1750 mA8.5 V55°70°Single ModeTwo-Tab C-Mount
QD8650CM18.60 - 8.70 µm (DFB)50 mW<900 mA9.5 V55°70°Single FrequencyTwo-Tab C-Mount
QD9500CM19.00 - 10.00 µm (DFB)60 mW<800 mA9.5 V40°55°Single FrequencyTwo-Tab C-Mount
QD9500HHLH9.00 - 10.00 µm (DFB)100 mW<600 mA10.2 V--Single FrequencyHorizontal HHL
QF9550CM19.55 µm (FP)80 mW1500 mA7.8 V35°60°Single ModeTwo-Tab C-Mount
QD10500CM110.00 - 11.00 µm (DFB)40 mW<600 mA10 V40°55°Single FrequencyTwo-Tab C-Mount

The rows shaded green above denote single-frequency lasers.

1550 nm External Cavity Single-Frequency Laser Diodes

Item # Info Wavelength Power Typical Drive Current Package Pin Code Wavelength
Spatial Mode
SFL1550S info 1550 nm 40 mW 300 mA SM Butterfly 14-Pin Butterfly Yes Single Modeb
SFL1550P info 1550 nm 40 mW 300 mA PM Butterflyc 14-Pin Butterfly Yes Single Modeb
  • For the center wavelengths currently available or to place an order, please contact Technical Support.
  • The laser output is single mode in both transverse and longitudinal modes.
  • The slow axis is aligned to the connector key.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SFL1550S Support Documentation
SFL1550S1550 nm, 40 mW, Butterfly External Cavity Laser, SM Fiber, FC/APC
SFL1550P Support Documentation
SFL1550P1550 nm, 40 mW, Butterfly External Cavity Laser, PM Fiber, FC/APC
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