Nd:YAG Fiber Isolators (PM Fiber)


Nd:YAG Fiber Optic Isolators with PM Fiber (1064 nm)

  • Center Wavelength at 1064 nm
  • Isolation up to 47 dB
  • FC/APC Connectorized o Unconnectorized PM Fiber
  • OEM and Build-to-Order Fiber Isolators Available


  • Minimize Feedback into Optical Systems
  • Operating Ranges of 1054 - 1074 nm, 1059 - 1069 nm, or 1060 - 1068 nm
  • At Least 0.8 m of Panda-Style PM Fiber on Both Sides
  • Available with 2.0 mm Narrow Key FC/APC Connectors or Bare Ends
  • Designed for CW Applications
  • Each Unit is Individually Tested
  • Custom Isolators Available

Fiber isolators protect light sources from back reflections and signals that can cause intensity noise and optical damage. Optical isolators, also known as Faraday isolators, are magneto-optic devices that preferentially transmit light in the forward direction while absorbing or displacing light propagating in the reverse direction (see the schematic below). Please see the Isolator Tutorial tab for an explanation of the operating principles of a Faraday isolator.

Isolator Schematic. Light propagating in the reverse direction is rejected by the input polarizer.

Thorlabs' polarization-dependent Nd:YAG isolators, sold on this page, are compatible with polarization-maintaining (PM) fibers. In contrast, our polarization-independent Nd:YAG isolators are designed to connect to single mode (SM) fibers. Our high-power units are built using a specialized fiber end face process that increases the maximum power. A length of 0.8 m of fiber is built in to each side of the isolator, and an arrow on the body indicates the transmission direction. In addition, each unit is tested before shipment to ensure compliance with our specifications and a complete test report comes with every serialized part.



1064 nm Polarization-Dependent Fiber Optic Isolators

Item # IO-G-1064
Polarization Dependent Dependent Dependent
Fiber Type PM PM PM
Center Wavelength 1064 nm 1064 nm 1064 nm
Operating Range 1059 - 1069 nm 1054 - 1074 nm 1060 - 1068 nm
Max Powera 300 mW (CW) 3 W (CW) 3 W (CW)
Isolation ≥35 dB 32 - 38 dB 42 - 47 dB
Performance Graph
(Click for Details)
Insertion Loss ≤1.8 dB (IO-G-1064)
≤2.1 dB (IO-G-1064-APC)
0.6 - 1.3 dBb 1.0 - 1.7 dB
Polarization Extinction Ratio (PER) ≥20 dB (IO-G-1064)
≥18 dB (IO-G-1064-APC)
>20 dBb >20 dB
Return Loss ≥50 dB (IO-G-1064)
≥45 dB (IO-G-1064-APC)
>50 dBb >55 dB
Fiber Fujikura SM98-PS-U25A PM 980/1064 SM98-PS-U40A-H
  • Not recommended for high-power pulsed applications.
  • Applies to IO-J-1064 only.



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