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NIR Fiber Isolators (PM Fiber)

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NIR Fiber Optic Isolators with PM Fiber (770 - 990 nm)




  • Center Wavelengths: 780 or 980 nm
  • Isolation up to 38 dB
  • OEM and Build-to-Order Fiber Isolators Available

Features

  • Minimize Feedback into Optical Systems
  • Operating Ranges of 770 - 790 nm or 970 - 990 nm
  • At Least 0.8 m of Panda-Style PM Fiber on Both Sides
  • 980 nm Version Available with 2.0 mm Narrow Key FC/APC Connectors or Bare Ends
  • 780 nm Version Available with 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).


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

Thorlabs' polarization-dependent NIR isolators, sold on this page, are compatible with polarization-maintaining (PM) fibers. In contrast, our polarization-independent NIR 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.

 

780 nm Polarization-Dependent Isolator



IO-J-780 Simplified Mechanical Drawing

 

 
Item # IO-J-780
Polarization Dependent
Fiber Type PM
Center Wavelength 780 nm
Operating Range 770 - 790 nm
Max Powera 3 W (CW)
Isolation 25 - 34 dB
Performance Graph
(Click for Details)
Insertion Loss 1.0 - 1.6 dB
Polarization Extinction Ratio (PER) ≥18 dB (Typ.)
Return Loss >50 dB
Fiber PM780-HP
  • Not recommended for high-power pulsed applications. The maximum power handling of this isolator is reduced with the addition of connectors.

 

980 nm Polarization-Dependent Isolators


IO-J-980(APC) Simplified Mechanical Drawing
 
Item # IO-J-980
IO-J-980APC
Polarization Dependent
Fiber Type PM
Center Wavelength 980 nm
Operating Range 970 - 990 nm
Max Powera 3 W (CW)
Isolation 30 - 38 dB
Performance Graph
(Click for Details)
Insertion Loss (Without Connectors) 0.8 - 1.4 dB
Polarization Extinction Ratio (PER) >20 dB
Return Loss >50 dB
Fiber PM980-XP
  • Not recommended for high-power pulsed applications. The maximum power handling of this isolator is reduced with the addition of connectors.

 

ABOUT US

Our Mission is to accelerate the advancement of optical technology for precision measurements and their applications from the table tops of research laboratories to standard use in communication and high technology industries. Our aim is to serve our customers. Our hope is to create a place for highly skilled people in an open environment

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