High Power PM Isolator

>High Power PM Isolator
High Power PM Isolator 2019-06-23T01:17:51+00:00
The high power PM isolator (1064/1030/980 nm polarization-maintaining optical fiber isolator) is one of the most important passive components. The function of a PM optical isolator is to let a light beam pass through in one direction, that is, the forward direction only, like a one-way traffic. At the same time, the PM optical isolator is able to maintain a well-defined state of polarization (SOP) of the light. The high power PM Isolator (polarization maintaining isolator) is used to prevent reflected light that causes undesirable effects such as frequency instability in laser sources and parasitic oscillation in optical amplifiers. Related Products

Applications of High Power PM Isolator (Polarization Maintaining Isolator) 

The PM isolator (polarization maintaining isolator) plays an important role in fiber-optic systems. It is known that back-reflected and scattered light reaching the sensitive cavity of transmitter lasers might strongly affect the performance of lasers. For reliable, high-power operation, the fiber laser cavity should be isolated from the backward light generated from the various parallel optical surfaces and the end faces of the connectors, splices and other optical components. In such cases, a high power PM isolator (polarization maintaining isolator) may be used to reduce the amount of light reaching back to the laser.


High Power PM Isolator (1064nm, 1030nm, 980nm; 20W)


High Power PM Isolator
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  • Polarization Maintaining
  • Low Insertion Loss
  • High Isolation and Return Loss
  • High Reliability and Stability


  • PM Fiber Amplifier
  • Fiber Laser
  • Testing Instruments
  • Mopa Fiber Laser


Specifications of High Power PM Isolator (Polarization Maintaining Isolator)
Center Wavelength (nm)1064 or 1030 or 980
Operating Wavelength Range (nm)±5
Typ. Peak Isolation at 23 ℃ (dB)30
Min. Isolation at 23 ℃ (dB)25
Typ. Insertion Loss at 23 ℃ (dB)0.8
Max. Insertion Loss at 23 ℃ (dB)1
Min. Extinction Ratio at 23 ℃20
Min. Return Loss (Input /Output) (dB)45
Max. Average Optical Power (W)20 or Specified
Max. Peak Power for ns Pulse (kW)10 or Specified
Max. Tensile Load (N)5
Package Dimension (nm)58x28x26
Operating Temperature ( ℃ )+10 to +50
Storage Temperature ( ℃ )0 to +60


  • The high power PM isolator (polarization maintaining isolator) is customizable, and the above specifications are subject to change without notice.
  • For CW high-power optical interconnection, we recommend fusion splice without connectors.
  • For device with connectors, IL is 0.3dB higher, RL is 5.0dB lower, ER is 2.0dB lower.
  • Operating on both slow axis and fast axis as standard, slow axis working and fast axis blocked available on request.
  • Bare fiber should not support the weight of the connector. So that if any connectors needed, for the pigtail type it’s better to choose the 900μm loose tube jacket instead of the 250μm bare fiber.
  • For product customization or special requirements, please contact Lfiber’s sales department for availability.


Package Dimensions


High Power Polarization-Maintaining PM Isolator 1064nm 1030nm 980nm
Maximum Optical Power Handling: 10W
High Power PM Isolator Polarization Maintaining Isolator 1064nm 1030nm 980nm
Maximum Optical Power Handling: 20W

Ordering Information for High Power PM Isolator (Polarization Maintaining Isolator)
Center WavelengthAxis AlignmentFiber TypePackage DimensionsPigtail TypeFiber LengthConnectorAverage PowerPeak Power
1064nmBoth axis workingPM155058x28x26 mm250μm bare fiber0.5 meterNone500mW10kW
1030nmSlow axis working and fast axis blockedPM1310Specified900μm loose tube0.8 meterFC/UPC1W20kW
980nmPM9801.0 meterFC/APC2W