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High-Speed Optical Transmitters with Phase Modulators

  • Digital Operation up to 12.5 Gb/s or 40 Gb/s
  • Integrated Phase Modulator with RF Driver Amplifier
  • Integrated C-Band Tunable Laser and Automatic Power Control
  • Accepts External Lasers from 1250 to 1610 nm


Optical Transmitter with
12.5 Gb/s Phase Modulator

Touch-Panel Interface for Device Control

Related Items

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Optical Transmitter Block Diagram
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Block diagram showing the internal setup of the high-speed optical transmitters. Thorlabs also offers Reference Transmitters based on intensity modulators.


  • All-in-One High-Speed Optical Transmitters Include:
    • Mach-Zehnder Phase Modulator
    • RF Amplifier
    • C-Band Laser Tunable on ITU 50 GHz Grid (Contact Tech Support to Request L-Band)
    • Variable Optical Attenuator (VOA) for Automatic or Manual Power Control
  • Digital Operation
    • MX10C for Applications up to 12.5 Gb/s
    • MX40C for Applications up to 40 Gb/s
    • User-Adjustable RF Amplifier Output Swing
  • Integrated Telecom Grade Laser Tunable on ITU 50 GHz Grid
    • C-Band Available from Stock
    • L-Band Available upon Request (Contact Tech Support)
  • Operation from 1250 to 1610 nm using External Laser Source
  • RF Amplifier with Amplitude and Eye-Crossing Controls
  • External Loop-Back Cables Support Custom Configurations
  • Intuitive Touchscreen Interface to Control Signal Generation
  • Custom Configurations Available by Contacting Tech Support

Thorlabs' High-Speed Optical Transmitters provide fully integrated, user-configurable solutions for high-speed phase modulation of light. They are based on proven lithium niobate (LiNbO3) modulator technology driven by high-fidelity RF amplifiers. The MX10C and MX40C are both designed for digital applications, and the maximum voltage output swing of their limiting RF amplifiers is user-adjustable. Each optical transmitter has a built-in telecom-grade tunable laser. Variable optical attenuators (VOAs) and power monitors enable completely automatic output power control and stabilization. These instruments are ideal for use in either an R&D laboratory or in a manufacturing environment for creating optical links, performing experiments requiring fast optical modulation, or testing other components. Both optical transmitters are well suited to phase-shift keying binary modulation formats including BPSK and DPSK. 

The internal C-band laser is tunable over a range of 1527.6 nm - 1565.5 nm (191.50 THz - 196.25 THz) on the ITU 50 GHz grid. A dither feature is available to stabilize the wavelength (see the Operation tab for more information). Instruments with an integrated L-band tunable laser are also available upon request (contact Tech Support). For further flexibility, the laser source and modulator are connected with an external loop-back cable, which allows users to modulate their own 1250 to 1610 nm laser source. The laser input port uses PM fiber with light linearly polarized along the slow axis (aligned to the connector key) and can accept a maximum input power of 20 dBm (100 mW). Each fiber bulkhead accepts FC/PC connectors.

The MX10C includes an external loop-back cable for the driver RF output and modulator RF input ports, which provides the opportunity to use an external driver, if desired (see the Front & Back Panel tab for details). The RF port on the MX10C accepts SMA connectors, and the RF port on the MX40C accepts 2.92 mm (K™) connectors. Please see Thorlabs' complete selection of microwave cables and adapters. These instruments are operated using an intuitive touchscreen interface, which gives the user complete control over all instrument functionality. For more information on the touchscreen interface and user-customizable features, please see the Operation tab.

K™ is a trademark of Anritsu.

General System Specifications
Item # MX10C MX40C
Amplifier Type Digital (Limiting)
Bit Rate (Maximum) 12.5 Gb/s 40 Gb/s
Internal Laser Wavelength Rangea 1527.6 -1565.5 nm (C-Band)
Output Power (Maximum) 13.5 dBm (Typical)
External Laserb Wavelength Range 1250 nm - 1610 nm
Optical Input Power 20 dBm (Max)
22 dBm (Absolute Max)
Power Calibration Points 1310 nm, 1550 nm, and 1590 nm
Optical Extinction Ratio 13 dB (Typical Maximum)
Electrical Return Lossc -10 dB (Any RF Port, Typical)
Modulator Type Phase
Optical Insertion Loss (Typical)d 4.5 dB (1550 nm)
6.5 dB (1310 nm)
5.0 dB (1550 nm)
7.0 dB (1310 nm)
Internal Optical Fiber PM Ports: PM Panda-Style Fiber
SM Port: SMF-28-Compatible Fiber
Fiber Connectors FC/PC, 2.0 mm Narrow Key
  • Tunable in 50 GHz steps, L-band laser is available upon request.
  • User-Supplied
  • To the -3 dB Bandwidth
  • Laser IN to Optical OUT. Insertion Loss at 1310 nm is typically 2 dB higher than at 1550 nm.
Digital (Limiting) RF Amplifier Specifications
Item # MX10C MX40C
Bit Rate (Maximum) 12.5 Gb/s 40 Gb/s
Amplifier RF Inputa,b 400 mV (Typical)
3.5 V (Max)
4 V (Absolute Max)
400 mV (Typical)
4 V (Max)
6 V (Absolute Max)
Amplifier RF Output Swing (User-Adjustable)a 3 V - 7 V 
RF Amplifier Gain (Fixed) 34 dB 30 dB
Rise/Fall Timec 35 ps 8 ps
Low Frequency Cutoff 100 kHz
  • Peak to Peak
  • Input is AC-Coupled. Maximum DC input allowable is ±15 V for the MX10C and ±10 V for the MX40C.
  • Large Signal, Digital Response
Internal Laser Specifications (MX10C and MX40B)
Parameter Unit Min Typical Max
Wavelength Range (C-Band)a nm 1527.6 - 1565.5
Frequency Range (C-Band)a THz 191.50 - 196.25
Output Optical Power dBm 12.5 13.5 14.5
Frequency Accuracy GHz -1.5 - 1.5
Tuning Resolution GHz - 50 -
Tuning Speed
(Between Wavelengths)
secs - 10 -
SMSRb dB 40 55 -
OSNRc dB 40 60 -
Intrinsic Linewidth kHz - 10 15
RINd dB/Hz - - -145
Back Reflection dB - - -14
Polarization Extinction Ratio dB 18 - -
  • C-band laser included standard in all models. L-band version available upon request by contacting Tech Suppport.
  • Side Mode Suppression Ratio
  • Optical Signal Noise Ratio
  • Relative Intensity Noise, i.e., the noise in the optical power normalized to the average power level.
C-Band Laser Performance
Click to Enlarge

FM Noise Spectrum of the integrated tunable laser. The dither function helps stabilize the wavelength. Turning the dither off provides for lower noise.
Phase Modulator Specifications
Item # MX10C MX40C
Electro-optic Bandwidth (-3 dB) 10 GHz 35 GHz
RF Drive Voltage (Vπ)a 4.5 V 7.0 V
Modulator RF Inputb,c 5.5 V (Typical)
7 V (Max)
10 V (Absolute Max)
Insertion Lossd 3.5 dB (1550 nm)
5.5 dB (1310 nm)
4.0 dB (1550 nm)
6.0 dB (1310 nm)
  • Peak to Peak Voltage at 1 GHz
  • Peak to Peak Voltage
  • This specification is quoted only for the MX10B and MX10C. The external loop-back between the output of the RF amplifier and the internal modulator is accessible to the operator on these units, but the connection is made directly inside the housing on the MX40B and MX40C.
  • Laser IN to Optical OUT. Insertion Loss at 1310 nm is typically 2 dB higher than at 1550 nm.
Power Monitor and VOAa Specifications (MX10C and MX40C)
Power Monitor Accuracyb ±0.5 dBm at Power Calibration Points
Power Monitor Resolutionb 0.01 dBm
Power Monitor Insertion Loss 0.1 dB (Typical) per Monitor
VOA Insertion Loss 0.4 dB (Typical)
VOA Response Time 1 s
  • Variable Optical Attenuator
  • Applies to each of the three internal power monitors.
Power and Environmental Specifications (MX10C and MX40C)
Parameter Min Max
Main AC Voltage 100 VAC 250 VAC
Power Consumption - 60 VA
Line Frequency 50 Hz 60 Hz
Operating Temperature 10 °C 40 °C
Storage Temperature 0 °C 50 °C
Humiditya 5% Relative Humidity 85% Relative Humidity
  • Non-Condensing Environment

System Overview

These High-Speed Optical Transmitters are fully integrated and contain both the laser source and the lithium niobate Mach-Zehnder phase modulator; the only required external input is the signal source to the Amplifier RF In port. Either the internal laser or an external laser source may be coupled to the Laser In port, which is shown in the bottom-left corner of the diagram below. This port uses polarization maintaining (PM) fiber with light linearly polarized along the slow axis, as shown on the front panel of the instrument. Optical power is monitored in three places (Monitor 1, Monitor 2, and Monitor 3) for the purpose of enabling power control. These power values are also available at the I/O port. Monitor 1 is at the laser input, Monitor 2 is at the output of the modulator, and Monitor 3 is at the final optical output.

Optical Transmitter Block Diagram
A Block Diagram of the Internal Setup of the High-Speed Optical Transmitters

Instrument Control

The graphical user interface (GUI) gives the user complete control over all instrument functionality. It is a resistive touchscreen display sensitive to both finger pressure and taps from a plastic stylus. The knob on the front panel of the housing can be used in place of the on-screen arrow buttons for quickly changing set-point values. Pressing (clicking) the knob will confirm a new set-point value. Additionally, the instruments can be driven using serial commands delivered via connectors on the rear panel.

Optical Transmitter Main Menu
Click to Enlarge

Figure 1: Home Screen of the MX10C (Identical to the MX40C)

The Home Screen of the MX10C is shown in Figures 1. It is organized into three main sections.  

  • Left Column:
    • Buttons show the on/off status of the different instrument functions.
    • Tap a button to toggle the function on/off.
  • Middle Column:
    • Current operating parameters of each control function are shown.
    • Tap in this column to access the Settings page for each function.
  • Right Column:
    • Buttons provide access to various utility and help functions.
    • Tap to review and customize system settings.

The green dot that appears in the upper-right of the center column panels indicates that those functions are stable. The dot will blink if that function is still stabilizing. 

Functions and controls enabled by the GUI are further discussed in the following sections.

Laser and System Wavelength Settings

System Wavelength
Click to Enlarge

Figure 3: System Wavelength Selection Screen
Optical Transmitter Laser
Click to Enlarge

Figure 2: Laser Settings Screen

The laser setting screen shown in Figure 2 is accessed directly from the home screen. Each instrument includes a C-band telecom-style laser that is tunable on the ITU 50 GHz grid. (L-band telecom-style laser available upon request by contacting ITU Channel wavelengths are indexed for convenience; use the arrow buttons to step through the indices to select the desired wavelength. This screen also allows the user to control whether or not the dither feature is used to stabilize the wavelength. Turning dither off results in lower phase and intensity noise (see the Specs tab for a representative plot), but doing so may also result in the wavelength drifting slightly over time. If an external laser is used, the internal laser can be turned off by tapping the laser button on the home screen.

If an external laser is used, it may be necessary to change the power monitor calibration settings. These instruments can be used at wavelengths anywhere between 1250 nm and 1610 nm, and calibration settings are supplied for three wavelengths: 1310 nm, 1550 nm, and 1590 nm. These wavelengths represent the centers of the O-Band, C-Band, and L-Band. The default calibration setting corresponds to the wavelength range of the internal laser. If operating outside that wavelength range, change the power monitor calibration settings by tapping the Menu button on the home page. Select the System Wavelength setting, shown in Figure 4, to change the power monitor calibration wavelength to the value closest to the wavelength of the laser source being used.

Optical Transmitter Amplifier
Click to Enlarge

Figure 5: Limiting amplifiers in the MX10C and MX40C provide high gain and a user-adjustable output swing in 0.1 V increments.
Optical Transmitter Amplifier
Click to Enlarge

Figure 4: Digital RF Amplifier Settings Screen for the MX10C and MX40C

Limiting RF Amplifier

The amplifiers used in the MX10C and MX40C have “limiting” characteristics once a certain output voltage swing has been reached. This enables cleaner transmission of two-level digital signals. In addition, the peak-peak output swing can adjusted to control the extinction ratio (ER) of the output optical signal. These controls can be accessed from the Amplifier Settings page shown in Figure 4. The relationship between the input and output signals is shown in Figure 5. Small signals experience high gain, but as the signal level increases, the output signal swing is limited at the chosen set point.

For small input signals (before the amplifier limits), these instruments can actually be operated in analog mode. In this mode, the Output Swing is automatically set to its maximum value so that the linear gain region is maximized. Note that this only works if the input signal swing is kept small enough not to saturate the amplifier. See the manual for details.

The eye crossing point can be also adjusted during both digital and analog mode operation. A set point of 0 specifies a 50% crossing, which corresponds to the point midway between the signal's maximum and minimum values. Set points of -100 and +100 specify 35% and 65% crossings, respectively.

Variable Optical Attenuator

Click to Enlarge

Figure 6: VOA Settings Screen

The VOA provides the means for adjusting and stabilizing the modulated optical output power. The VOA settings screen, which is shown in Figure 6, allows the user to choose between and adjust the parameters of the two operational modes. In Constant Attenuation mode, the attenuation level between the Return from Modulator input port and the Final Optical Output port is fixed, which allows power fluctuations at the input of the power controller to be transferred to the output. In Constant Output Power Mode, the final optical output power is held constant independent of the input fluctuations. In this mode, the VOA is effectively used as a power stabilizer. Tap the Step function button at the right of the screen to change the step size by which the arrows increment or decrement the set point values.

The VOA settings screen also allows the user to select the units used to report the power readings and parameters on all pages. Use the Power Units field to choose whether power values are reported as mW or dBm.

Rear Panel

The rear panel provides additional safety and utility functions such as the laser safety interlock and the power monitor output, RS-232, and USB ports. The USB interface is currently used only for firmware upgrades that are made available on Thorlabs website. Future revisions of the firmware will provide for remote control of the instrument's functions.

All units are shipped from Thorlabs with a shorting device that is already installed in the interlock connector, thus allowing the instrument to be operated normally right out of the box. To make use of the interlock feature, a 2.5 mm plug can be wired to the remote interlock switch and plugged into the back-panel interlock jack in place of the shorting plug. Electrical specifications for this function are provided in the manuals, which can be accessed by clicking on the red document icons () below.

Front Panels

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MX10C Optical Transmitter Front Panel

Click to Enlarge

MX40C Optical Transmitter Front Panel
Callout Description
1 Touchscreen Display and Control
2 Value Adjustment Knob
3 Key Switch and Indicator Light for Internal Laser
4 Earth Ground Port for ESD Wrist Strap Banana Plug
5a Laser Out for Internal Laser Source,
Accepts PM Fiber with FC/PC Connector
6a Laser In to Modulator,
Accepts PM Fiber with FC/PC Connector
7b Optical Out: Final Output from Modulator
8 Amplifier Out: Signal from Internal Amplifier, SMA Female
9 Modulator RF In: Signal to Modulator, SMA Female
10 Amplifier RF In: Signal Input to Amplifier, SMA Female
11 On/Standby Button
  • Uses PM Panda Fiber for Internal Connection
  • Uses SMF-28-Compatible Fiber for Internal Connection
Callout Description
1 Touchscreen Display and Control
2 Value Adjustment Knob
3 Key Switch and Indicator Light for Internal Laser
4 Earth Ground Port for ESD Wrist Strap Banana Plug
5a Laser Out for Internal Laser Source,
Accepts PM Fiber with FC/PC Connector
6a Laser In to Modulator,
Accepts PM Fiber with FC/PC Connector
7b Optical Out: Final Output from Modulator
8 Amplifier RF In: Signal Input to Amplifier, K™ Female
9 On/Standby Button
  • Uses PM Panda Fiber for Internal Connection
  • Uses SMF-28-Compatible Fiber for Internal Connection

Back Panel

Click to Enlarge

The back panel format is the same for each of the high-speed optical transmitters.
Callout Description
1a I/O Control Port
Outputs from Three Integrated Power Monitors
2 Laser Interlock Jack
3a RS-232 Control Port
4 USB Port (Type B)
5 AC Power Cord Connector
6 Fuse Tray
7 AC Power Switch
  • See the Pin Diagrams tab for pin assignments.

 I/O DB15 Connector

The I/O connector provides analog outputs from the three power monitors.
Pin Description Pin Description
1 Power Monitor 1 9 Analog Ground
2 Power Monitor 2 10 Analog Ground
3 Power Monitor 3 11 Reserved for Future Use
4 Reserved for Future Use 12 Reserved for Future Use
5 Analog Ground 13 Monitor 1 Gain Indicator
6 Analog Ground 14 Monitor 2 Gain Indicator
7 Analog Ground 15 Monitor 3 Gain Indicator
8 Analog Ground - -

RS-232 Connector

The RS-232 connector is included to support future remote operation that will be enabled by future firmware upgrades.
Pin Description
1 Not Connected
2 RS232 Input
3 RS232 Output
4 Not Connected
5 Digital Ground
6 Not Connected
7 Not Connected
8 Not Connected
9 Not Connected

USB Type B Connector

USB type B
The USB connector is provided for firmware upgrades and future remote operation.

Each High-Speed Optical Transmitter Includes:

  • Optical Transmitter Main Unit
  • Power Cord According to Local Supply (Determined by Ordering Location)
  • PM Loop-Back Fiber Optic Cable
  • SMA Loop-Back RF Cable (MX10C Only)
  • Interlock Keys for Front Panel
  • 2.5 mm Interlock Pin (Pre-installed in Back Panel)
  • 1.25 A, 250 VAC Fuse
  • USB Type A to Type B Cable, 6' Long

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

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.
  • Laser Safety CurtainsLaser Barriers and 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 Laser Barrier or 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

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Posted Comments:
Posted Date:2017-01-25 05:10:19.753
Hi, I would like to use the MX10B or C for RF-over optical. Would the MX10B be suitable for a 2.4GHz RF carrier (say WiFi)? Thanks
Posted Date:2017-01-26 05:15:25.0
Hello, thank you for contacting Thorlabs. MX10B or MX10C should be suitable at 2.4GHz, and I will reach out to you directly to discuss your application.
Posted Date:2016-09-26 13:45:43.643
Hi, Can you make the MX40B @ 850 nm ?
Posted Date:2016-09-27 02:41:56.0
Response from Jeremy at Thorlabs: We will contact you directly to discuss about the 850nm modulator.
Posted Date:2016-08-10 02:41:07.97
Hi, We are interested in an analog version of the MX40 transmitter S Yu Advanced Electro-Optics Co Taiwan

Transmitters with Integrated Phase Modulators and Lasers

Selected Specificationsa
Item # MX10C MX40C
Max Bit Rate (Digital) 12.5 Gb/s 40 Gb/s
Analog Bandwidth (Small Signal) 7 GHz 20 GHz
Modulator Bandwidth (-3 dB) 10 GHz 35 GHz
Wavelength Range 1527.6 - 1565.5 nm (C-Band)
Frequency Range 191.50 - 196.25 THz
Intrinsic Linewidth 10 kHz (Typical)
15 kHz (Max)
External Laserc Wavelength Range 1250 nm - 1610 nm
Internal Power Monitor
Calibration Points
1310 nm, 1550 nm,
and 1590 nm
  • For complete specifications, see the Specs tab.
  • A C-band laser is included standard with all optical transmitters. Versions with internal L-band tunable lasers are available upon request. Please contact Tech Support for details.
  • User-provided.
  • High-Speed Phase Modulation
  • Digital Operation
    • MX10C: 12.5 Gb/s Maximum System Bit Rate
    • MX40C: 40 Gb/s Maximum System Bit Rate
  • Analog (Linear) Operation
    • MX10C: Up to 7 GHz Small Signal Bandwidth
    • MX40C: Up to 20 GHz Small Signal Bandwidth
  • LiNbO3 Phase Modulator Built Into the Package
  • Integrated C-Band* Laser is Tunable on ITU 50 GHz Grid

These all-in-one optical transmitters each integrate a high-speed phase modulator with a C-band* tunable laser source, bias control, RF driver amplifier, and variable optical attenuator. The MX10C phase modulator supports speeds of up to 12.5 Gb/s digital operation and up to 7 GHz when used in analog mode, while the MX40C includes a phase modulator that supports speeds of up to 40 Gb/s digital operation and up to 20 GHz when used in analog mode.

*Custom configurations, including versions of these optical transmitters with internal L-band tunable lasers, are also available upon request. Please contact Tech Support for more information.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
MX10C Support Documentation
MX10CHigh-Speed Optical Transmitter, Phase Modulator, 12.5 Gb/s Max
MX40C Support Documentation
MX40CHigh-Speed Optical Transmitter, Phase Modulator, 40 Gb/s Max
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