Faraday isolator is a kind of magneto-optical device based on Faraday magneto-optical effect. It can rotate the polarization direction of the polarized light into a certain angle, and the rotation direction is only related to the internal magnetic field, and has nothing to do with the light direction. The rotation angle of common Faraday isolator is designed as 45˚ or 90˚. A 45˚ polarizer is placed between two polarizers in a 45˚ configuration to form an faraday optical isolator. Faraday optical isolator is a kind of magneto-optical device with unidirectional light transmission, which is widely used in laser amplification system, film-locked laser and laser measurement equipment.
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Faraday isolator is optical component that allows light to pass through in only one direction. They are used, for example, to efficiently protect against back reflections in laser systems. To protect a laser source from destabilizing feedback or actual damage from back-reflected light, a Faraday optical isolator works as a uni-directional light valve.
In a Faraday isolator the rotator is inserted between two Glan Taylor prisms which are usually arranged at an angle of 45°. A Faraday Isolator is a device that isolates the laser source from an optical system, to protect the laser source from reflections. It uses the magneto-optic rotation phenomenon to protect the laser source from reflections that can damage the operation of the laser system.
A Faraday Isolator basically acts as an optical diode allowing the propagation of light in only one direction. A typical Faraday isolator is made up of a Faraday rotator, two polarizers, and a body to house the parts.
A Faraday isolator is a kind of optical isolator, i.e., a device which transmits light in a certain direction while blocking light in the opposite direction. Faraday isolators are based on Faraday rotators and constitute the technologically most important type of optical isolators. The simplest type of Faraday isolator is polarization-sensitive in the sense that it works only when the input beam has a prescribed direction of linear polarization. Here, a properly polarized and collimated input beam passes a first polarizer (pol 1 in Figure 1) with minimum loss, then a 45° Faraday rotator, and finally another polarizer (pol 2) with its transmitting axis being rotated by 45°, such that the transmission losses are small.
Parameter
| Center wavelength(nm) | Model | Product type | Clear aperture (mm) | Rotation angle | Extinction Ratio @25℃ | Isolation @25℃ | Damage threshold @10ns | Transmittance | Polarizer | Package form |
| 405 | CL405-FP001 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞90% | NA | 1# |
| CL405-OI001 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞85% | PBS Cube | 1# | |
| 515 | CL515-FP002 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL515-OI002 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 532 | CL532-FP003 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL532-OI003 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 564 | CL564-FP004 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL564-FP004 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 633 | CL633-FP005 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL633-OI005 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 660 | CL660-FP006 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL660-OI006 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 730 | CL730-FP007 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL730-OI007 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 780 | CL780-FP008 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL780-FP008 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 808 | CL808-FP009 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL808-FP009 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 830 | CL830-FP010 | Polarimeter | 2 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL830-FP010 | Isolator | 2 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 850 | CL850-FP011 | Polarimeter | 2 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 1# |
| CL850-FP011 | Isolator | 2 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 1# | |
| 895 | CL895-FP012 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 3# |
| CL895-OI012 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 3# | |
| 940 | CL940-FP013 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 3# |
| CL940-OI013 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 3# | |
| 980 | CL980-FP014 | Polarimeter | 2.5 | 45˚±1˚ | ＞30dB | NA | 3.5J/cm2 | ＞95% | NA | 3# |
| CL980-FP014 | Isolator | 2.5 | NA | NA | ＞30dB | 3.5J/cm2 | ＞90% | PBS Cube | 3# | |
| 1030 | CL1030-FP015 | Polarimeter | 10 | 45˚±1˚ | ＞30dB | NA | 5J/cm2 | ＞95% | NA | 4# |
| 8 | 4# | |||||||||
| 5 | 3# | |||||||||
| 2.5 | 3# | |||||||||
| CL1030-OI015 | Isolator | 10 | NA | NA | ＞30dB | 5J/cm2 | ＞90% | PBS Cube | 4# | |
| 8 | 4# | |||||||||
| 5 | 3# | |||||||||
| 2.5 | 3# | |||||||||
| 1060 | CL1060-FP016 | Polarimeter | 10 | 45˚±1˚ | ＞30dB | NA | 5J/cm2 | ＞95% | NA | 4# |
| 8 | 4# | |||||||||
| 5 | 3# | |||||||||
| 2.5 | 3# | |||||||||
| CL1060-OI016 | Isolator | 10 | NA | NA | ＞30dB | 5J/cm2 | ＞90% | PBS Cube | 4# | |
| 8 | 4# | |||||||||
| 5 | 3# | |||||||||
| 2.5 | 3# |
Mechanical dimension drawing
- High isolation
- Low insertion loss
- Multiple clear apertures
- Double escape windows at both ends
- Multiple wavelengths available
- Practicality of a certain wavelength bandwidth
- Output polarization controllable
- Seed light amplifying laser
- Lock film laser
- A semiconductor laser
- Optical measuring equipment
- Optical parametric oscillator
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