Magneto-Optical Crystal Film Faraday Isolators, 4SL Series
The LINOS® 4SL Series Faraday Isolators are engineered for peak performance in the near-infrared (NIR) range. They feature an ultra-compact footprint, making them ideal for space-constrained optical systems. At the core is a magneto-optical crystal film operating in magnetic saturation, ensuring high isolation and low insertion loss. They are particularly well-suited for precision NIR applications where size, stability, and efficiency matter most.
This ultra-compact 4SL Series Faraday Isolators use a specialized Faraday material for enhanced performance. They guarantee ≥35 dB isolation, supports a maximum of 8W CW power, and allows for 360° rotation of the output polarizer.
| Product | FI-1250-4SL | FI-1310-4SL | FI-1550-4SL |
| Aperture Diameter | 4.0 mm | 4.0 mm | 4.0 mm |
| Design Wavelength | 1250.0 nm | 1310.0 nm | 1550.0 nm |
| Isolation value (dB) | > 35 | > 35 | > 35 |
| Transmission at design wavelength | > 85.0 % | > 90.0 % | > 90.0 % |
| Transmission at boundary wavelength | > 80.0 % | > 85.0 % | > 85.0 % |
| Wavelength Range | 1200.0 - 1300.0 nm | 1260.0 - 1360.0 nm | 1485.0 - 1615.0 nm |
| Damage Threshold @ 8.0 ns pulses (J/cm²) | 1.0 @ 1250.0 nm | 1.0 @ 1310.0 nm | 1.3 @ 1550.0 nm |
| Part Number | 845110200004 | 84501071000 | 84501072000 |
- Compact Design: Simplifies OEM integration, shortens optical paths and provides flexible mounting options without compromising performance.
- High isolation: ≥35dB guaranteed, for use in challenging setups, reducing laser interference and crosstalk.
- Faraday material: magneto-optical crystal film in saturation (rare earth magnet), reducing thermal sensitivity.
- Polarizers: easy access to blocked beam and 360° rotation for output polarizer, to find perfect balance between insertion loss and isolation.
FI-x-4SL (x = 1250, 1310, 1550 nm)
| Product | FI-1250-4SL | FI-1310-4SL | FI-1550-4SL |
| Aperture Diameter | 4.0 mm | 4.0 mm | 4.0 mm |
| Design Wavelength | 1250.0 nm | 1310.0 nm | 1550.0 nm |
| Isolation value (dB) | > 35 | > 35 | > 35 |
| Transmission at design wavelength | > 85.0 % | > 90.0 % | > 90.0 % |
| Transmission at boundary wavelength | > 80.0 % | > 85.0 % | > 85.0 % |
| Wavelength Range | 1200.0 - 1300.0 nm | 1260.0 - 1360.0 nm | 1485.0 - 1615.0 nm |
| Damage Threshold @ 8.0 ns pulses (J/cm²) | 1.0 @ 1250.0 nm | 1.0 @ 1310.0 nm | 1.3 @ 1550.0 nm |
| Part Number | 845110200004 | 84501071000 | 84501072000 |
- Compact Design: Simplifies OEM integration, shortens optical paths and provides flexible mounting options without compromising performance.
- High isolation: ≥35dB guaranteed, for use in challenging setups, reducing laser interference and crosstalk.
- Faraday material: magneto-optical crystal film in saturation (rare earth magnet), reducing thermal sensitivity.
- Polarizers: easy access to blocked beam and 360° rotation for output polarizer, to find perfect balance between insertion loss and isolation.
FI-x-4SL (x = 1250, 1310, 1550 nm)