Free-Space Optical Isolators

Thorlabs offers a wide selection of free-space optical isolators. These isolators typically have higher transmittance and isolation compared to all other isolators on the market. Furthermore, because of certain proprietary features (covered by 25 years of experience and 5 US patents), OFR Isolators are smaller and have higher performance than any units of equivalent aperture available anywhere.

An optical isolator is a passive magneto-optic device that only allows light to travel in one direction. Isolators are used to protect a source from back reflections or signals that may occur after the isolator. Back reflections can damage a laser source or cause it to mode hop, amplitude modulate, or frequency shift. In high power applications, back reflections can cause instabilities and power spikes.

Thorlabs offers adapters to mount OFR isolator bodies into SM series components. Please see below for more information.





OFR, a company with a 35-year history, became a division of Thorlabs in January 2007. Shortly afterwards, the OFR group began a rapid expansion of its optical isolator production facilities with support from a team of Thorlabs lean manufacturing experts. Driven in large part by the growing demand created by the rapid expansion of the fiber laser market, we are now producing significant volumes of optical isolators.

To further develop our capabilities, in June 2008 we completed the installations of precision thin film coating facilities. OFR’s new coating facility will support the expansion of its world-class line of optical isolators and provide the flexibility needed to expand its on-demand production capabilities of custom or OEM optical isolators.

1064 nm Polarization-Dependent Isolators, High Power

IO-3-1064-HP

Isolator Type: Adjustable Narrowband
Polarizer Type: Glan-Type Crystal Polarizer
Wavelength Tuning Range: 1029 - 1099 nm
Max Beam Power: 30 W
Max Power Density: 600 W/cm2
Aperture/Max Beam Dia: 2.8 mm/1.8 mm

IO-3-1064-VHP

Isolator Type: Adjustable Narrowband
Polarizer Type: Brewster Window Polarizer
Wavelength Tuning Range: 1058 - 1070 nm
Max Beam Power: 50 W
Max Power Density: 1 kW/cm2
Aperture/Max Beam Dia: 2.8 mm/1.8 mm 

IO-5-1064-HP
Isolator Type: Adjustable Narrowband
Polarizer Type: Glan-Type Crystal Polarizer
Wavelength Tuning Range: 1029 - 1099 nm
Max Beam Power: 60 W
Max Power Density: 410 W/cm2
Aperture/Max Beam Dia: 4.8 mm/3.1 mm

IO-5-1064-VHP
Isolator Type: Adjustable Narrowband
Polarizer Type: Brewster Window Polarizer
Wavelength Tuning Range: 1058 - 1070 nm
Max Beam Power: 100 W
Max Power Density: 680 W/cm2
Aperture/Max Beam Dia: 4.8 mm/3.1 mm

IO-8-1064-HP
Isolator Type: Adjustable Narrowband
Polarizer Type: Glan-Type Crystal Polarizer
Wavelength Tuning Range: 1029 - 1099 nm
Max Beam Power: 75 W
Max Power Density: 190 W/cm2
Aperture/Max Beam Dia: 7.8 mm/5 mm

IO-10-1064-VHP
Isolator Type: Adjustable Narrowband
Polarizer Type: Brewster Window Polarizer
Wavelength Tuning Range: 1058 - 1070 nm
Max Beam Power: 200 W
Max Power Density: 330 W/cm2
Aperture/Max Beam Dia: 9.8 mm/6.2 mm

Features
Free-Space Operation
Fixed and Adjustable Narrowband and Fixed and Adjustable Broadband Versions Available
Isolation up to 44 dB
High Power Safe, Some Units up to 20 kW/cm2 CW (1 GW/cm2 Pulsed)
Manufactured by OFR, a Division of Thorlabs