Isolators for OEM

Customizable Wavelength, Aperture, Power, Housing, Polarizers, and Operating Temperature
Customized Isolators at Close to Standard Version Prices
Wide Range of Application Services Available

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Custom Isolators
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Figure 32A 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), we also offer various application services.

Table 32B Specifications
Parameter	Range
Wavelength Range	From 365 - 4550 nm^a
Aperture Sizes	Up to Ø15 mm
Polarization Dependence	Dependent or Independent
Max Power^b	Up to 2 GW/cm²
Isolation	Up to 60 dB (Tandem Units)
Operating Temperature	10 - 70 °C

Custom Faraday rotators, for use in the 365 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. Table 32B 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 offer Faraday rotators center wavelengths from 532 nm to 1550 nm. These are the same components used to make our isolators and rotate the polarization of incoming light by 45°. Please contact Tech Support if you require a Faraday rotator with a rotation angle or center wavelength outside of the aforementioned specifications.

Table 32C Specifications
Parameter	Range
Wavelength Range	From 633 - 2050 nm^a
Polarization Dependence	Dependent or Independent
Max Power^b (Fiber to Free-Space)	30 W
Max Power^b (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. Table 32C 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 Tables 32D and 32E.

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

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Custom Free-Space Isolator for Wavelengths Below 633 nm

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Twin Steel Pins Insert into FiberBench

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Mounted Isolator

Table 32D Polarization Independent Fiber

Table 32E Polarization Maintaining Fiber

Make to Order Options

Tables 32F, 32G, 32H, and 32J 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.

Table 32F Adjustable Narrowband Isolators

Table 32G Faraday Rotators

Table 32H Fixed Narrowband Isolators

Center Wavelength	Isolation, Beam Diameter (Max), Power (Max)	Item Number
543 nm	≥30 dB, Ø2.7 mm Beam, 0.7 W	IO-3D-543-PBS
594 nm	IO-3D-594-PBS
810 nm	≥34 dB, Ø2.7 mm Beam, 0.7 W	IO-3D-810-PBS
1310 nm	≥36 dB, Ø1.6 mm Beam, 0.2 W	IO-D-1310-VLP
Tandem Isolators
Center Wavelength	Isolation, Beam Diameter (Max), Power (Max)
1150 nm	≥60 dB, Ø3.6 mm Beam, 1.2 W	IOT-4-1150-VLP
1220 nm	IOT-4-1220-VLP
1310 nm	IOT-4-1310-VLP
1390 nm	IOT-4-1390-VLP
1480 nm	IOT-4-1480-VLP
1650 nm	IOT-4-1650-VLP

Table 32J 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

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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 \| Independent
Isolation (dB):
% Transmission:
Fiber:
Fiber Connector:	FC/PC \| FC/APC \| Other
Output:	Fiber \| Free-Space
Notes:

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Posted Comments:

satheesh k (posted 2023-10-09 12:44:07.477)

I had mailed techsupport@thorlabs requesting details for custom isolators. Haven't heard from them yet. Is there an alternate contact id?

ksosnowski (posted 2023-10-13 05:06:05.0)

Hello Satheesh, thanks for reaching out to us. We have received your request I have reached out directly to discuss this further and arrange a quote.

jens (posted 2009-09-18 12:29:09.0)

A reply from Jens at Thorlabs: please let me reply in english to make the reply useful to as many users as possible. Below you asked for a solution to avoid a backreflection effect between your fiber and your laser. You mentioned that currently you are using an FC/PC connector, therefore I would highly recommend to switch over to FC/APC in the first step to reduce any backreflection signal. We can also offer a custom fiber isolator for your wavelength range of 633nm. In addition an antireflective coating on the fiber tip may also be an option. We will contact you directly to discuss which of the options is the best for your particular application.

s.griesing (posted 2009-09-18 08:00:34.0)

Fiber-optical insulator Guten Tag, ich baue ein Faserinterferometer für 633nm Wellenlänge auf; die Laserleistung liegt um 5mW. In Vorversuchen konnte ich ein langperiodisches (ca. 0,2Hz) Signal erkennen, das von der (unerwünschten) Interferenz zwischen emittierenden und vom Ende der Einkopplel-Faser (FC/PC Anschluß) rückreflektierten Licht herrühren könnte. Von daher denke ich über einen entsprechenden Faserisolator nach- wie hoch wäre da der Preis? Vielen Dank. Mit freundlichen Grüßen, Stefan Griesing

klee (posted 2009-06-25 11:33:26.0)

A response from Ken at Thorlabs to hxzou: We can quote these but we will need more information. A sales representative from OFR will contact you directly.

hxzou (posted 2009-06-25 08:32:11.0)

Dear, We need two Isolator at 532nm, tow isolator at 266nm and one isolator at 718nm. Can you make them? If you can, would you please send me a quotation? Hongxin

Wavelength Range	Mode Field Diameter	Numerical Aperture	Fiber Type
633 - 780 nm	3.6 - 5.3 µm @ 633 nm	0.10 - 0.14	SM600
780 - 970 nm	5.0 ± 0.5 µm @ 850 nm	0.13	780HP
830 - 980 nm	4.7 - 6.9 µm @ 830 nm	0.10 - 0.14	SM800-5.6-125
900 - 1600 nm	23 - 27 µm	0.05 - 0.07	LMA-GDF-25/250
960 - 1040 nm	9 - 13 µm @ 1060 nm	0.075	SM-GSF-10/125
980 - 1064 nm	5.9 ± 0.3 µm @ 980 nm 6.2 ± 0.3 µm @ 1060 nm	0.14	HI1060-J9
1060 - 1600 nm	8 - 13 µm @ 1060 nm	0.075	SM-GDF-10/125
1060 - 1600 nm	23 - 27 µm	0.11	MM-GDF-25/250-11FA
1060 - 1600 nm	25.0 ± 1.5 µm	0.065 ± 0.005	LMA-GDF-25/400-M
1260 - 1625 nm	9.2 ± 0.4 µm @ 1310 nm 10.4 ± 0.5 µm @ 1550 nm	0.14	SMF-28-J9
1530 - 1800 nm	25 ± 2.0 µm	0.09	LMA-GDF-25/300

Wavelength Range	Mode Field Diameter	Numerical Aperture	Fiber Type
620 - 850 nm	4.5 ± 0.5 µm @ 630 nm	0.12	PM630-HP
770 - 1100 nm	5.3 ± 1.0 µm @ 850 nm	0.12	PM780-HP
900 - 980 nm	10 - 11 µm @ 1060 nm	0.085	PM085 LNA
970 - 1550 nm	6.6 ± 0.5 µm @ 980 nm	0.12	PM980-XP
1060 - 1600 nm	8.7 - 11.3 µm	0.15	PM-GDF-10/130-15FA
1060 - 1600 nm	11.0 ± 1.0 µm	0.075 ± 0.005	PLMA-GDF-10/125-M
1060 - 1600 nm	25.0 ± 1.5 µm	0.065 ± 0.005	PLMA-GDF-25/250-M
1270 - 1625 nm	9.3 ± 0.5 µm @ 1300 nm	0.12	PM1300-XP
1440 - 1625 nm	10.1 ± 0.4 µm @ 1550 nm	0.125	PM1550-XP
1850 - 2200 nm	8.0 µm @ 1950 nm	0.20	PM2000

Center Wavelength	Isolation, Beam Diameter (Max), Power (Max)	Item Number
405 nm	≥32 dB, Ø2.7 mm Beam, 3.5 W	IO-3-405-GLB
405 nm	≥32 dB, Ø4.7 mm Beam, 1.5 W	IO-5-405-GLB
633 nm	≥35 dB, Ø4.7 mm Beam, 40 W	IO-5-633-HP
750 nm	≥38 dB, Ø4.7 mm Beam, 40 W	IO-5-750-HP
810 nm	≥38 dB, Ø4.7 mm Beam, 40 W	IO-5-810-HP
810 nm	≥35 dB, Ø4.7 mm Beam, 1.7 W	IO-5-810-VLP
915 nm	≥35 dB, Ø4.7 mm Beam, 40 W	IO-5-915-HP
980 nm	≥35 dB, Ø2.7 mm Beam, 0.7 W	IO-3-980-VLP
980 nm	≥35 dB, Ø2.7 mm Beam, 15 W	IO-3-980-HP
1030 nm	≥35 dB, Ø2.7 mm Beam, 15 W	IO-3-1030-HP
1150 nm	≥38 dB, Ø4.7 mm Beam, 1.7 W	IO-5-1150-VLP
1220 nm	≥38 dB, Ø4.7 mm Beam, 1.7 W	IO-5-1220-VLP
1310 nm	≥36 dB, Ø4.7 mm Beam, 1.7 W	IO-5-1310-VLP
1480 nm	≥38 dB, Ø4.7 mm Beam, 1.7 W	IO-5-1480-VLP
1550 nm		IO-5-1550-VLP
1650 nm		IO-5-1650-VLP
1950 nm	≥28 dB, Ø4.7 mm Beam, 1.7 W	IO-5-1950-VLP
1950 nm	≥28 dB, Ø4.7 mm Beam, 20 W	IO-5-1950-HP
2050 nm	≥28 dB, Ø4.7 mm Beam, 1.7 W	IO-5-2050-VLP
2050 nm	≥28 dB, Ø4.7 mm Beam, 20 W	IO-5-2050-HP

Rotation: 45° ±3°
Center Wavelength	Isolation, Beam Diameter (Max), Power (Max)	Item Number
405 nm	Ø2.7 mm Beam, 3.5 W	IO-3D-405-I
532 nm	Ø2.7 mm Beam, 15 W	IO-3D-532-I
543 nm	Ø2.7 mm Beam, 15 W	IO-3D-543-I
633 nm	Ø2.3 mm Beam, 8.0 W	IO-2.5D-633-I
633 nm	Ø2.7 mm Beam, 12 W	IO-3D-633-I
660 nm	Ø2.7 mm Beam, 12 W	IO-3D-660-I
670 nm	Ø4.7 mm Beam, 40 W	IO-5-670-I
780 nm	Ø2.7 mm Beam,15 W	IO-3D-780-I
810 nm	Ø2.7 mm Beam, 15 W	IO-3D-810-I
810 nm	Ø4.7 mm Beam, 40 W	IO-5-810-I
830 nm	Ø2.7 mm Beam, 15 W	IO-3D-830-I
830 nm	Ø4.7 mm Beam, 40 W	IO-5-830-I
850 nm	Ø2.7 mm Beam, 15 W	IO-3D-850-I
850 nm	Ø4.7 mm Beam, 40 W	IO-5-850-I
980 nm	Ø2.7 mm Beam, 15 W	IO-3D-980-I
1030 nm	Ø2.7 mm Beam, 15 W	IO-3-1030-I
1030 nm	Ø4.7 mm Beam, 40 W	IO-5-1030-I
1150 nm	Ø3.6 mm Beam, 1.2 W	IO-4-1150-I
1310 nm	Ø1.6 mm Beam, 0.2 W	IO-D-1310-I
	Ø2.3 mm Beam, 0.4 W	IO-2.5-1310-I
	Ø3.6 mm Beam, 4.0 W	IO-4-1310-I
1390 nm	Ø3.6 mm Beam, 1.2 W	IO-4-1390-I
1480 nm	Ø3.6 mm Beam, 1.2 W	IO-4-1480-I
1550 nm	Ø1.6 mm Beam, 0.2 W	IO-D-1550-I
	Ø2.3 mm Beam, 0.5 W	IO-2.5-1550-I
	Ø3.6 mm Beam, 1.2 W	IO-4-1550-I
1650 nm	Ø3.6 mm Beam, 1.2 W	IO-4-1650-I
2050 nm	Ø3.6 mm Beam, 1.2 W (Rotation for 2050 nm Isolators is 45° ±4°.)	IO-4-2050-I

Center Wavelength	Isolation, Beam Diameter (Max), Power (Max)	Item Number
532 nm	Ø4.5 mm Beam, 35 W	IO-5BB-532-HP
633 nm	Ø4.5 mm Beam, 35 W	IO-5BB-633-HP
840 nm	Ø4.5 mm Beam, 1.7 W	IO-5BB-840-VLP
840 nm	Ø4.5 mm Beam, 35 W	IO-5BB-840-HP
895 nm	Ø4.5 mm Beam, 1.7 W	IO-5BB-895-VLP
895 nm	Ø4.5 mm Beam, 35 W	IO-5BB-895-HP
950 nm	Ø4.5 mm Beam, 1.7 W	IO-5BB-950-VLP
950 nm	Ø4.5 mm Beam, 35 W	IO-5BB-950-HP
1064 nm	Ø4.5 mm Beam, 1.7 W	IO-5BB-1064-VLP
1064 nm	Ø4.5 mm Beam, 35 W	IO-5BB-1064-HP