New! The new broadband optical isolator Model ISO-05-800-BB replaces the obsolete ISO-05-800-BB-G and ISO-05-800-BB-P.
A Faraday Optical Isolator is essentially a magneto-optic device working like a uni-directional light valve. Use it to protect a laser source from destabilizing feedback or actual damage from back-reflected light. Newport offers free space optical isolators packaged in a compact cylinder with a base plate for ease of mounting into an optical train. Our optical isolator offering includes:
• LP Series low-power (630 - 1030 nm)
• MP Series medium-power (500 - 1030 nm)
• ISO-FRDY Series high power (wavelength range 1013 - 1077 nm)
• Broadband (720 - 950 nm) for Ti:Sapphire tuning range
The -W suffix in each model indicates an added 1/2 wave plate at the output stage so that the direction of the output beam polarization can be rotated to a desired direction.
The LP Series utilizes field proven, high efficiency Corning Polarcor™ polarizers ideal for laser diode applications. The MP Series uses a higher damage threshold BK-7 polarizing beamsplitter (PBS) and provides double escape ports for applications where rejected power exceeds 0.5 W. The ISO-FRDY Series offers high pulse damage thresholds in the NIR range.
The broadband Faraday isolator is ideal for individual amplifier isolation in a Ti:Sapphire chain while maintaining the ability to tune rapidly over the amplifier bandwidth or isolating a femtosecond oscillator from a Ti:Sapphire regenerative amplifier. It provides the advantage of operating over a wide spectral range without requiring manual adjustments.
Wavelength Tunable LP Series Specifications
|
Model |
ISO-04-650-LP
|
ISO-04-780-LP
|
ISO-04-850-LP
|
ISO-04-980-LP
|
| Clear Aperture (mm) |
4 |
| Center Wavelength (nm) |
650 |
780 |
850 |
980 |
| Spectral Range (nm) |
630–700 |
720–840 |
840–960 |
960–1030 |
| Isolation (dB) @ 25°C |
30-35 |
30–38 |
30–38 |
30–38 |
| Transmission (%) @ 25°C |
>75 |
>82 |
>88 |
>90 |
| CW Damage Threshold (W/cm2) |
25 |
| Polarizer Type |
Dichroic Glass Polarizer |
1. LP series optical isolators utilize Corning PolarcorTM and there is no escape port.
2. LP series optical isolators have a temperature dependence. Specifications quoted above are for 25°C ±8°C.
3. Storage temperature for these isolators should not exceed 70°C
4. Wavelength tuning: Please consult Users Guide for instruction for tuning of these isolators for a specific wavelength.
5. These devices contain strong magnets. Do not attempt to disassemble your Faraday isolator.
6. To order with a 1/2 waveplate use -W extension.
Wavelength Tunable MP Series Specifications
|
Model |
ISO-04-532-MP
|
ISO-04-650-MP
|
ISO-04-780-MP
|
ISO-04-850-MP
|
ISO-04-980-MP
|
| Clear Aperture (mm) |
4 |
| Center Wavelength (nm) |
532 |
650 |
780 |
850 |
980 |
| Spectral Range (nm) |
500–600 |
600–680 |
720–830 |
800–900 |
900–1030 |
| Isolation (dB) @ 25°C |
27–32 |
27–32 |
27–35 |
27–35 |
27–35 |
| Transmission (%) @ 25°C |
>88 |
| CW Damage Threshold (kW/cm2) |
2 |
Pulse Damage Threshold (J/cm2), for 10ns pulses
|
1 |
| Polarizer Type |
PBS Cube Polarizer |
1. Escape Ports: MP Isolators contain PBS cubes with double escape ports on the input and output of the isolator. For rejected powers exceeding 0.5 W the escape ports should be used. Please make sure beams exiting the escape ports are properly terminated.
2. MP series isolators have a temperature dependence. Specifications quoted above are for 25°C ±8°C.
3. Storage temperature for MP series isolators should not exceed 70°C.
4. Wavelength tuning: Please consult the Users Guide for instructions on wavelength tuning of these isolators.
5. These devices contain strong magnets. Do not attempt to disassemble your Faraday isolator.
6. To order with a 1/2 waveplate use -W extension.
Broadband Isolator Specifications
|
Model |
ISO-05-800-BB
|
ISO-05-800-BB-P
(Obsolete) |
ISO-05-800-BB-G
(Obsolete) |
| Polarization Direction of Input Beam |
Horizontal Polarization |
Horizontal Polarization |
Horizontal Polarization |
| Clear Aperture (mm) |
5 |
5 |
5 |
| Center Wavelength (nm) |
800 |
800 |
800 |
| Spectral Range (nm) |
720–950 |
720–950 |
720–950 |
| Isolation (dB) @ 25°C |
≥30 |
≥30 |
≥30 |
| Operating Temperature () |
10-50 |
|
|
| Storage Temperature () |
10-60 °C |
|
|
| Transmission (%) @ 25°C |
≥90 |
≥88 |
≥92 |
| Pulse Damage Threshold (MW/cm2) For a 10 ns pulse |
100 |
100 |
300 |
| Polarizer Type |
PBS Cube |
PBS Cube |
Glan Laser Calcite |
| Rotating Medium |
Terbium Gallium Granet |
Terbium Gallium Granet |
Terbium Gallium Granet |
1. Polarization Orientation: Please note that the broadband rotators and isolators utilize a 45° crystal quartz rotator. At the center wavelength there will be ≈ 90° polarization rotation in the forward direction. In the reverse direction, there will be ≈ 0° polarization rotation across the entire spectral bandwidth of the device.
2. Dispersion: Some pulse broadening does occur when using Newport's broadband isolator. Use the following Sellmeier Equation to calculate the dispersion in the Terbium Gallium Garnet material:
3. Operating and Storage Temperature: Performance of Newport's broadband rotators/isolators is related to operating temperature.
High-Power 1030 nm –1064 nm Isolators Specifications
|
Model |
ISO-FRDY-04 |
ISO-FRDY-08 |
| Clear Aperture (mm) |
4 |
8 |
| Center Wavelength (nm) |
1030, 1050, and 1064 nm |
| Spectral Range (nm) |
+/-13 nm of specified wavelength |
| Isolation (dB) @ 25°C, 1064nm |
≥30 |
| Transmission (%) @ 25°C, 1064nm |
≥92 |
| CW Damge Threshold (MW/cm2) |
1 |
| Pulse Damage Threshold (J/cm2) for 10 ns pulse |
5 |
| Rotating Medium |
Terbium Gallium Granet |
1. Operating Temperature: Performance of Newport's Faraday isolators is related to operating temperature. For information on the effect of operating temperature, please refer to the product support tab at Newport's website or contact us directly.
2. Escape Ports: All high power 1030–1080 nm isolators come standard with double escape ports on both the input and output polarizer assemblies. These escape ports can be adjusted by the customer to be either open or closed. If rejected average power exceeds 0.5 W or rejected energy exceeds 50 mJ (10 ns pulse), Newport recommends the escape ports be used. Failure to use the escape ports under these conditions could result in optical damage or degrade the performance of your isolator. Please consult User’s Guide on how to use the escape ports.
3. Newport's Faraday isolators provide ≥30 dB isolation for beams having a 1/e2 beam diameter ≤2/3 of the clear aperture.
4. To order with a 1/2 waveplate use -W extension.
