Create an Account  |   Log In

View All »Matching Part Numbers


Your Shopping Cart is Empty
         

Broadband Free-Space Isolators (650 - 1000 nm)


  • Operating Ranges as Broad as 330 nm
  • Fixed or Tunable Center Wavelengths
  • Isolation up to 40 dB and Powers up to 40 W
  • Custom Isolators Available Upon Request

IO-5-TIS2-HP

IO-5BB-800-HP

Removed
from Saddle

IO-5BB-800-HP

Shown in the Saddle (SM1RC) Mounted on an Optical Table
Using a BA1 Base with an SD1 1/4"-20 to 8-32 Counterbore Adapter

Related Items


Please Wait
Tunable Isolation Curves
Our Adjustable Broadband Isolators can be tuned to maximize the peak isolation for any wavelength within a broad spectral range.
Custom Isolators
  • Customizable Wavelength, Aperture, Max Power, Housing, Polarizers, and Operating Temperature
  • Pricing Similar to Stock Units
  • Wide Range of OEM Capabilities
  • Please Contact Tech Support or See Our Custom Isolators Page
Selection Guide for Isolators
(Click Here for Our Full Selection)
Free-Space Isolators
Spectral Region Wavelength Range
UV 365 - 385 nm
Visible 390 - 700 nm
NIR 690 - 1080 nm
Nd:YAG 1064 nm
IR 1110 - 2100 nm
MIR 2.20 - 4.55 µm
Broadband Free-Space Isolators
Fiber Isolators
Custom Isolators

Features

  • Minimize Feedback into Optical Systems
  • Free-Space Input and Output Ports
  • Fixed or Tunable Wavelength Ranges
  • At Least 30 dB Isolation Over a Broad Spectral Range
  • Ø4.5 mm Max Beam Diameter
  • Polarization-Dependent Input

Thorlabs is pleased to stock a variety of free-space optical isolators designed for broadband applications in the near infrared spectral range (650 - 1000 nm). Optical isolators, also known as Faraday isolators, are magneto-optic devices that preferentially transmit light along a single direction, shielding upstream optics from back reflections. Back reflections can create a number of instabilities in light sources, including intensity noise, frequency shifts, mode hopping, and loss of mode lock. In addition, intense back-reflected light can permanently damage optics. Please see the Isolator Tutorial tab for an explanation of the operating principles of a Faraday isolator.

For broadband applications in the near infrared range, we offer two types of isolators. The first type, Adjustable Broadband Isolators, offers the user the ability to adjust the alignment of the input and output polarizers, allowing tuning of the center wavelength over a range greater than 200 nm and operating ranges as broad as 330 nm. The second type, Fixed Broadband Isolators (IO-5BB-800-HP), offers a nearly flat isolation of 30 dB in the 748 - 851 nm wavelength range, helping to preserve the temporal profile of the input pulse. Please see the Isolator Types tab for additional design details and representative graphs of the wavelength-dependent isolation. Each isolator's housing is marked with an arrow that indicates the direction of forward propagation.

Each isolator's housing is marked with an arrow that indicates the direction of forward propagation. In addition, all isolators have engravings that indicate the alignment of the input and output polarizers.

Thorlabs also manufactures isolators for fiber optic systems and wavelengths from the visible to the infrared (see the Selection Guide table to the right). If Thorlabs does not stock an isolator suited for your application, please refer to the Custom Isolators tab for information on our build-to-order options, or contact Tech Support. Thorlabs' in-house manufacturing service has over 25 years of experience and can deliver a free-space isolator tuned to your center wavelength from 244 nm to 4.55 µm.

Shaded regions on a graph represent the center wavelength tuning range of the isolator. With these isolators, the isolation and transmission curves will shift as the center wavelength shifts. If the graph is not shaded, then the isolator is non-tunable. Please note that these curves were made from theoretical data and that isolation and transmission will vary from unit to unit.

Fixed Narrowband Isolation

Fixed Narrowband Isolator

The isolator is set for 45° of rotation at the design wavelength. The polarizers are non-adjustable and are set to provide maximum isolation at the design wavelength. As the wavelength changes the isolation will drop; the graph shows a representative profile.

  • Fixed Rotator Element, Fixed Polarizers
  • Polarization Dependent
  • Smallest and Least Expensive Isolator Type
  • No Tuning

Adjustable Narrowband Isolation

Adjustable Narrowband Isolator

The isolator is set for 45° of rotation at the design wavelength. If the usage wavelength changes, the Faraday rotation will change, thereby decreasing the isolation. To regain maximum isolation, the output polarizer can be rotated to "re-center" the Gaussian isolation curve. This rotation causes transmission losses in the forward direction that increase as the difference between the usage wavelength and the design wavelength grows.

  • Fixed Rotator Element, Adjustable Polarizers
  • Polarization Dependent
  • General-Purpose Isolator

Adjustable Broadband Isolation

Adjustable Broadband Isolator

The isolator is set for 45° of rotation at the design wavelength. There is a tuning ring on the isolator that adjusts the amount of Faraday rotator material that is inserted into the internal magnet. As your usage wavelength changes, the Faraday rotation will change, thereby decreasing the isolation. To regain maximum isolation, the tuning ring is adjusted to produce the 45° of rotation necessary for maximum isolation.

  • Adjustable Rotator Element, Fixed Polarizers
  • Polarization Dependent
  • Simple Tuning Procedure
  • Broader Tuning Range than Adjustable Narrowband Isolators

Fixed Broadband

Fixed Broadband Isolator

A 45° Faraday rotator is coupled with a 45° crystal quartz rotator to produce a combined 90° rotation on the output.  The wavelength dependences of the two rotator materials work together to produce a flat-top isolation profile. The isolator does not require any tuning or adjustment for operation within the designated design bandwidth.

  • Fixed Rotator Element, Fixed Polarizers
  • Polarization Dependent
  • Largest Isolation Bandwidth
  • No Tuning Required

Tandem Isolators

Tandem Isolators

Tandem isolators consist of two Faraday rotators in series, which share one central polarizer. Since the two rotators cancel each other, the net rotation at the output is 0°. Our tandem designs yield narrowband isolators that may be fixed or adjustable.

  • Up to 60 dB Isolation
  • Polarization Dependent
  • Highest Isolation
  • Fixed or Adjustable

Polarizer Types, Sizes, and Power Limits

Thorlabs designs and manufactures several types of polarizers that are used across our family of optical isolators. Their design characteristics are detailed below. The part number of given isolator has an identifier for the type of polarizer that isolator contains. For more details on how the part number describes each isolator, see the given isolator's manual. 

Polarizer Comparison
Type Schematic
(Click to Enlarge)
Maximum Power Density Description
Very Low Power 
(C)
VLP Polarizer 10 W/cm2 (CW, Blocking)
25 W/cm2 (CW, Transmission)
Our Very Low Power Absorptive Film Polarizers are compact options for isolating free-space beams. For light polarized perpendicular to the polarizer's transmission axis, the max power density is 10 W/cm2, while for light polarized parallel to the polarizer's transmission axis, the max power density is 25 W/cm2.
Very Low Power
(VLP)
VLP Polarizer 25 W/cm2 (CW, Blocking)
100 W/cm2 (CW, Transmission)
These polarizers are also for use with very low power sources but are made with a different material than the type C polarizers listed above. This gives these polarizers a higher maximum power density. For light polarized perpendicular to the polarizer's transmission axis, the max power density is 25 W/cm2, while for light polarized parallel to the polarizer's transmission axis, the max power density is 100 W/cm2.
Wire Grid
(WG)
VLP Polarizer 25 W/cm2 (CW) Wire Grid Polarizers are used in our mid-IR isolators. They consist of a linearly spaced wire grid pattern that is deposited onto an AR-coated silicon substrate.
Polarizing Beamsplitter
(PBS)
PBS Polarizer 13 - 50 W/cm2 (CW) Polarizing Beamsplitter Cubes are commonly used in low-power applications and feature an escape window useful for monitoring or injection locking.
α-BBO
Glan-Laser
(GLB)
GLB Polarizer 100 W/cm2 (CW) Thorlabs' α-BBO Glan-Laser polarizers are all based on high-grade, birefringent, α-BBO crystals with a wavelength range of 210 - 450 nm. Due to the birefringent structure of α-BBO, a phase delay is created between two orthogonally polarized waves traveling in the crystal. These are similar to the High Power (HP) polarizers, but have a different escape angle.
Low Power
(LP)
LP Polarizer 250 W/cm2 (CW)
25 MW/cm2 (Pulsed)
Our Low Power Polarizers are Glan-type, crystal polarizers, providing high transmission and power densities at the expense of a larger package than Very Low Power (VLP) and Polarizing Beamsplitter (PBS) polarizers.
Medium Power
(MP)
MP Polarizer 100 W/cm2 (CW)
50 MW/cm2 (Pulsed)
Medium Power Polarizers are Glan-type, crystal polarizers, capable of handling higher powers. The rejected beam is internally scattered, which reduces the maximum power density, but also eliminates a stray beam from the setup.
High Power
(HP)
HP Polarizer 500 W/cm2 (CW)
150 MW/cm2 (Pulsed)
High Power Polarizers are Glan-type, crystal polarizers, similar in size and transmission to Medium Power (MP) polarizers, but capable of handling higher powers. They feature an escape window suited for injection locking.
Yttrium Orthovanadate
(YV)
HP Polarizer 25 W/cm2 (CW) YV polarizers are similar to the Medium Power (MP) Glan-type crystal polarizers; however, by using yttrium orthovanadate (YVO4) rather than calcite, YV polarizers can accommodate wavelengths in the 2.0 - 3.4 µm range. The rejected beam is internally scattered, which reduces the maximum power density, but also eliminates a stray beam from the setup.
Very High Power
(VHP)
VHP Polarizer 20 kW/cm2 (CW)
2 GW/cm2 (Pulsed)
Our Very High Power Polarizers are based on Brewster windows and feature the highest power handling possible. These polarizers have larger packages than HP-based designs, but are also more economical. All VHP-based designs also feature escape windows.

Optical Isolator Tutorial

Function
An optical isolator is a passive magneto-optic device that only allows light to travel in one direction. Isolators are used to protect a source from back reflections or signals that may occur after the isolator. Back reflections can damage a laser source or cause it to mode hop, amplitude modulate, or frequency shift. In high-power applications, back reflections can cause instabilities and power spikes.

An isolator's function is based on the Faraday Effect. In 1842, Michael Faraday discovered that the plane of polarized light rotates while transmitting through glass (or other materials) that is exposed to a magnetic field. The direction of rotation is dependent on the direction of the magnetic field and not on the direction of light propagation; thus, the rotation is non-reciprocal. The amount of rotation Q equals V x L x H, where V, L, and H are as defined below.

 

Faraday Effect in an Isolator Drawing
Figure 1. Faraday Rotator's Effect on Linearly Polarized Light

Faraday Rotation

Q = V x L x H

V: the Verdet Constant, a property of the optical material, in minutes/Oersted-cm.

L: the path length through the optical material in cm.

H: the magnetic field strength in Oersted.

An optical isolator consists of an input polarizer, a Faraday rotator with magnet, and an output polarizer. The input polarizer works as a filter to allow only linearly polarized light into the Faraday rotator. The Faraday element rotates the input light's polarization by 45°, after which it exits through another linear polarizer. The output light is now rotated by 45° with respect to the input signal. In the reverse direction, the Faraday rotator continues to rotate the light's polarization in the same direction that it did in the forward direction so that the polarization of the light is now rotated 90° with respect to the input signal. This light's polarization is now perpendicular to the transmission axis of the input polarizer, and as a result, the energy is either reflected or absorbed depending on the type of polarizer.

 

Drawing of Light Propagation Through an Isolator
Figure 2. A polarization-dependent isolator. Light propagating in the reverse direction is rejected by the input polarizer.

Polarization-Dependent Isolators

The Forward Mode
In this example, we will assume that the input polarizer's axis is vertical (0° in Figure 2). Laser light, either polarized or unpolarized, enters the input polarizer and becomes vertically polarized. The Faraday rotator will rotate the plane of polarization (POP) by 45° in the positive direction. Finally, the light exits through the output polarizer which has its axis at 45°. Therefore, the light leaves the isolator with a POP of 45°.

The Reverse Mode
Light traveling backwards through the isolator will first enter the output polarizer, which polarizes the light at 45° with respect to the input polarizer. It then passes through the Faraday rotator rod, and the POP is rotated another 45° in the positive direction. This results in a net rotation of 90° with respect to the input polarizer, and thus, the POP is now perpendicular to the transmission axis of the input polarizer. Hence, the light will either be reflected or absorbed.

 

Light Propagation Through a Polarization-Independent IsolatorClick for Details
Figure 3. A polarization independent isolator. Light is deflected away from the input path and stopped by the housing.

Polarization-Independent Fiber Isolators

The Forward Mode
In a polarization independent fiber isolator, the incoming light is split into two branches by a birefringent crystal (see Figure 3). A Faraday rotator and a half-wave plate rotate the polarization of each branch before they encounter a second birefringent crystal aligned to recombine the two beams.

The Reverse Mode
Back-reflected light will encounter the second birefringent crystal and be split into two beams with their polarizations aligned with the forward mode light. The faraday rotator is a non-reciprocal rotator, so it will cancel out the rotation introduced by the half wave plate for the reverse mode light. When the light encounters the input birefringent beam displacer, it will be deflected away from the collimating lens and into the walls of the isolator housing, preventing the reverse mode from entering the input fiber.

 

General Information

Damage Threshold
With 25 years of experience and 5 U.S. patents, our isolators typically have higher transmission and isolation than other isolators, and are smaller than other units of equivalent aperture. For visible to YAG laser Isolators, Thorlabs' Faraday Rotator crystal of choice is TGG (terbium-gallium-garnet), which is unsurpassed in terms of optical quality, Verdet constant, and resistance to high laser power. Thorlabs' TGG Isolator rods have been damage tested to 22.5 J/cm2 at 1064 nm in 15 ns pulses (1.5 GW/cm2), and to 20 kW/cm2 CW. However, Thorlabs does not bear responsibility for laser power damage that is attributed to hot spots in the beam.

Dispersion Measurement of Isolator IO-5-780-HP
Figure 4. Pulse Dispersion Measurements Before and After an IO-5-780-HP Isolator

Magnet
The magnet is a major factor in determining the size and performance of an isolator. The ultimate size of the magnet is not simply determined by magnetic field strength but is also influenced by the mechanical design. Many Thorlabs magnets are not simple one piece magnets but are complex assemblies. Thorlabs' modeling systems allow optimization of the many parameters that affect size, optical path length, total rotation, and field uniformity. Thorlabs' US Patent 4,856,878 describes one such design that is used in several of the larger aperture isolators for YAG lasers. Thorlabs emphasizes that a powerful magnetic field exists around these Isolators, and thus, steel or magnetic objects should not be brought closer than 5 cm.

Temperature
The magnets and the Faraday rotator materials both exhibit a temperature dependence. Both the magnetic field strength and the Verdet Constant decrease with increased temperature. For operation greater than ±10 °C beyond room temperature, please contact Technical Support.

Pulse Dispersion
Pulse broadening occurs anytime a pulse propagates through a material with an index of refraction greater than 1. This dispersion increases inversely with the pulse width and therefore can become significant in ultrafast lasers.

τ: Pulse Width Before Isolator

τ(z): Pulse Width After Isolator

Example:
t = 197 fs results in t(z) = 306 fs (pictured to the right)
t = 120 fs results in t(z) = 186 fs

Optical Isolator in FiberBench Mount
Click to Enlarge

Custom Isolator Example
Custom Adjustable Narrowband Isolator with Different Input and Output Polarizers Optimized for 650 nm Wavelength and 40 °C Temperature.

OEM Application Services

  • Direct Integration to Laser Head Assemblies
  • Combination Isolator and Fiber Coupling Units
  • Minimum Footprint Packages
  • Filter Integration
  • Active Temperature Control and Monitoring
  • Feedback Monitoring
  • Environmental Qualification
  • Private Labeling
  • ITAR-Compliant Assembly

OEM and Non-Standard Isolators

In an effort to provide the best possible service to our customers, Thorlabs has made a commitment to ship our most popular free-space and fiber isolator models from stock. We currently offer same-day shipping on more than 90 isolator models. In addition to these stock models, non-stock isolators with differing aperture sizes, wavelength ranges, package sizes, and polarizers are available. In addition, we can create isolators tuned for specific operating temperatures and isolators that incorporate thermistors with heating or cooling elements for active temperature control and monitoring. These generally have the same price as a similar stock unit. If you would like a quote on a non-stock isolator, please fill out the form below and a member of our staff will be in contact with you.

Thorlabs has many years of experience working with OEM, government, and research customers, allowing us to tailor your isolator to specific design requirements. In addition to customizing our isolators (see the OEM Application Services list to the right), we also offer various application services.

 

Parameter Range
Wavelength Range From 244 - 4550 nma
Aperture Sizes  Up to Ø15 mm
Polarization Dependence Dependent or Independent
Max Powerb Up to 2 GW/cm²
Isolation Up to 60 dB (Tandem Units)
Operating Temperature 10 - 70 °C
  • Custom Faraday rotators, for use in the 244 to 5000 nm range, are also available.
  • The maximum power specification represents the maximum power for the combined forward and reverse directions. Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.

Free-Space Isolators

We are able to provide a wide range of flexibility in manufacturing non-stock, free-space isolators. Almost any selection of specifications from our standard product line can be combined to suit a particular need. The table to the right shows the range of specifications that we can meet.

We offer isolators suitable for both narrowband and broadband applications. The size of the housing is very dependent on the desired maximum power and aperture size, so please include a note in the quote form below if you have special requirements.

 

Faraday Rotators

We can also offer Faraday rotators which rotate the polarization of incoming light by 45° ± 3°. These are similar to our isolators but with the polarizers at each end removed. They are available with center wavelengths from 244 to 5000 nm.

 

Parameter Range
Wavelength Range From 633 - 2050 nma
Polarization Dependence Dependent or Independent
Max Powerb (Fiber to Free-Space) 30 W
Max Powerb (Fiber to Fiber) 20 W
Operating Temperature 10 - 70 °C
  • For wavelengths shorter than 633 nm, we recommend using our free-space isolators in conjunction with our modular FiberBench accessories. Please contact Technical Support for more information.
  • The maximum power specification represents the maximum power for the combined forward and reverse directions. Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.

Fiber Isolators

Thorlabs is uniquely positioned to draw on experience in classical optics, fiber coupling, and isolators to provide flexible designs for a wide range of fiber optic specifications. Current design efforts are focused on increasing the Maximum power of our fiber isolators at and near the 1064 nm wavelength. We offer models with integrated ASE filters and taps. The table to the right highlights the range of specifications that we can meet.

The fiber used is often the limiting factor in determining the Maximum power the isolator can handle. We have experience working with single mode (SM) and polarization-maintaining fibers (PM); single-, double- and triple-clad fibers; and specialty fibers like 10-to-30 µm LMA fibers and PM LMA fibers. For more information about the fiber options available with our custom isolators, please see the expandable tables below.

In the spectral region below 633 nm, we recommend mounting one of our free-space isolators in a FiberBench system. A FiberBench system consists of pre-designed modules that make it easy to use free-space optical elements with a fiber optic system while maintaining excellent coupling efficiency. Upon request, we can provide select stock isolators in an optic mount with twin steel dowel pins for our FiberBench systems, as shown to the left.

We are also in the process of extending our fiber isolator capabilities down into the visible region. For more information, please contact Technical Support.

Custom Fiber Isolator

Custom Free-Space Isolator for Wavelengths Below 633 nm

Optical Isolator in FiberBench Mount
Click to Enlarge

Twin Steel Pins Insert into FiberBench
Optical Isolator in FiberBench Mount
Click to Enlarge

Mounted Isolator
Polarization Independent Fiber
Polarization Maintaining Fiber

 

Make to Order Options

The expandable tables below provide information on some common isolator and rotator specials we have manufactured in the past. We keep the majority of the components for these custom isolators in stock to ensure quick builds, so these specials are available with an average lead time of only 2-4 weeks.  Please use the Non-Stock Isolator Worksheet below for a quote.

Adjustable Narrowband Isolators
Faraday Rotators
Fixed Narrowband Isolators
Fixed Broadband Isolators

 

Custom Request Form

Request a custom isolator quote using the form below or by contacting us for more information at (973) 300-3000.

Non-Stock Isolator Worksheet:
Please select your input type:   Free-Space Input  |    Fiber Input
Is this an ITAR request?:   Yes  |    No     Not sure?
Close [X]

ITAR (International Traffic in Arms Regulation) is a United States Government regulation controlling the import and export of defense-related articles on the United States Munitions List (USML). Information and material pertaining to military and defense related technology may only be shared with U.S. Persons unless authorization from the Department of State is received or a special exemption is used.
Free-Space Input
Wavelength or Wavelength Range (nm):
Power (W):
Max 1/e2 Beam Diameter (mm):
Isolation (dB):
% Transmission:
Notes:
Fiber Input
Wavelength or Wavelength Range (nm):
Power (W):
Polarization Sensitivity:  Dependent   |     Indepentent
Isolation (dB):
% Transmission:
Fiber:
Fiber Connector:   FC/PC   |     FC/APC   |     Other
Output:   Fiber   |     Free-Space
Notes:

Customer Information:
First Name*:
Last Name*:
Company:
Address*:
Country*:
Zip/Postal Code*:
County:
City*:
State/Province*:
Phone:
Fax:
Email*:

Characters are Case-Sensitive



Posted Comments:
No Comments Posted

The following selection guide contains all of Thorlabs' Free-Space Optical Isolators. Click the colored bars below to to see specifications and options for each wavelength range and isolator type. Please note that Thorlabs also offers fiber optical isolators and custom optical isolators.

Optical_Isolator

Adjustable Broadband NIR Polarization-Dependent Isolators

Click Image for Details IO-5-NIR-LP IO-5-TIS2-HP
Item # IO-5-NIR-LPa IO-5-TIS2-HPa,b
Type Adjustable Broadband Adjustable Broadband
Center Wavelength N/A N/A
Tuning Range 700 - 925 nm 780 - 1000 nm
Operating Range 650 - 980 nm 780 - 1000 nm
Transmission 93% 91%
Isolation 36 dB (Min)
40 dB (Typ.)
33 dB (Min)
39 dB (Typ.)
Performance Graph
(Click for Details)
Click to View Isolator Performance Graph
Max Beam Diameterc 4.5 mm 4.5 mm
Max Powerd 7 W 40 W
Max Power Density 250 W/cm2 500 W/cm2
Compatible Mounting
Adapterse
SM3B2
C2RC (C2RC/M)
  • Center Wavelength Adjustable Across >200 nm Wavelength Range
  • Greater Isolation and Transmission than Fixed Broadband Isolators

Thorlabs' Adjustable Broadband Isolators offer the ability to tune the center wavelength of the instruments for peak isolation over a very broad range of over 200 nm. They offer higher isolation and transmission than fixed broadband isolators (sold below), but they have a narrower operating wavelength range once the center wavelength is set. Custom adjustable broadband isolators are available by contacting Tech Support.

  • The housing of this isolator cannot be freely rotated in its saddle. However, tapped holes in the housing allow the isolator to be mounted with the polarization axis either parallel or perpendicular to the base of the mount. If you require free rotation for your setup, consider using an SM3B2 or C2RC (C2RC/M) adapter (see below for details).
  • This isolator has two exit ports for rejected beams. Adequate beam traps should be selected and positioned to ensure safety.
  • Defined as containing 100% of the beam energy.
  • The maximum power specification represents the maximum power for the combined forward and reverse directions. Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.
  • Please see below for further details.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
IO-5-NIR-LP Support Documentation
IO-5-NIR-LPFree-Space Isolator, 700 - 925 nm, Ø4.5 mm Max Beam, 7 W Max
$2,847.84
Today
IO-5-TIS2-HP Support Documentation
IO-5-TIS2-HPFree-Space Isolator, 780 - 1000 nm, Ø4.5 mm Max Beam, 40 W Max
$3,348.66
Today

Fixed Broadband NIR Polarization-Dependent Isolator

Click Image for Details IO-5BB-800-HP
Item # IO-5BB-800-HPa
Type Fixed Broadband
Center Wavelength 800 nm
Tuning Range N/A
Operating Range 748 - 851 nm
Transmission 88%
Isolation 30 dB (Min)
Performance Graph
(Click for Details)
Isolator Performance Graph
Max Beam Diameterb 4.5 mm
Max Powerc 35 W
Max Power Density 500 W/cm2
Compatible Mounting
Adaptersd
CP12
SM1RCe (SM1RC/M)
SM1TC
SM2A21
  • Flat Isolation and Transmission over Broad ~100 nm Wavelength Range
  • Hands-Off Operation; No Adjustment Required

Thorlabs' Fixed Broadband Isolator offers a very broad ~100 nm operating wavelength range centered at 800 nm. The flat isolation and transmission of this isolator across this broad range helps to preserve the temporal shape of short laser pulses. The center wavelength of this isolator is fixed for simple operation with no required tuning or adjustments. Custom fixed broadband isolators are available by contacting Tech Support.

  • This isolator has two exit ports for rejected beams. Adequate beam traps should be selected and positioned to ensure safety.
  • Defined as containing 100% of the beam energy.
  • The maximum power specification represents the maximum power for the combined forward and reverse directions. Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.
  • Please see below for further details.
  • One SM1RC with an 8-32 tap is included with each of these isolators. For an isolator that includes an SM1RC/M with an M4 tap, please contact Tech Support prior to ordering.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
IO-5BB-800-HP Support Documentation
IO-5BB-800-HPFree-Space Isolator, 748 - 851 nm, Ø4.5 mm Max Beam, 35 W Max
$2,514.30
Today

Isolator Mounting Adapters

Limited Stock Icon

The SM3B2 will be retired without replacement when stock is depleted. If you require this part for line production, please contact our OEM Team.

These adapters provide mechanical compatibility between our isolator bodies and SM2 (2.035"-40) lens tubes, SM3 (3.035"-40) lens tubes, 30 mm cage systemsØ1/2" posts, or Ø1" posts.

Click Image to Enlarge CP12 SM1RC SM1TC SM2A21 SM3B2 C2RC
Item # CP12 SM1RC(/M) SM1TC SM2A21 SM3B2 C2RC(/M)
Isolator Diameter 1.2" 1.2" 1.2" 1.2" 2.0" 2.0"
Mounting Options 30 mm Cage Systems Ø1/2" Posts Ø1/2" Posts SM2 Lens Tubes or Mechanics with Ø2" Bore SM3 Lens Tubes Ø1/2" Posts or
Ø1" Posts
Compatible Isolators IO-5BB-800-HP IO-5-NIR-LP
IO-5-TIS2-HP
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
SM1RC Support Documentation
SM1RCØ1.20" Slip Ring for SM1 Lens Tubes and C-Mount Extension Tubes, 8-32 Tap
$23.66
Today
C2RC Support Documentation
C2RCØ2" Slip Ring, 8-32 Tap
$38.51
Today
+1 Qty Docs Part Number - Universal Price Available / Ships
CP12 Support Documentation
CP12Customer Inspired! 30 mm Cage Plate, Ø1.2" Double Bore for SM1 and C-Mount Lens Tubes
$20.81
Today
SM1TC Support Documentation
SM1TCØ1.20" Clamp for SM1 Lens Tubes and C-Mount Extension Tubes
$43.10
Today
SM2A21 Support Documentation
SM2A21Externally SM2-Threaded Mounting Adapter with Ø1.20" Bore and 2" Outer Diameter
$46.16
Today
SM3B2 Support Documentation
SM3B2Ø2.0" Isolator to SM3 Adapter
$36.72
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
C2RC/M Support Documentation
C2RC/MØ2" Slip Ring, M4 Tap
$38.51
Today
SM1RC/M Support Documentation
SM1RC/MØ1.20" Slip Ring for SM1 Lens Tubes and C-Mount Extension Tubes, M4 Tap
$23.66
Today
Log In  |   My Account  |   Contact Us  |   Careers  |   Privacy Policy  |   Home  |   FAQ  |   Site Index
Regional Websites: West Coast US | Europe | Asia | China | Japan
Copyright 1999-2018 Thorlabs, Inc.
Sales: 1-973-300-3000
Technical Support: 1-973-300-3000


High Quality Thorlabs Logo 1000px:Save this Image