1550nm Dual Stage PM Fiber Isolator 500mW Corning PM1550 Slow Axis High Isolation Low Loss FC APC Steel Tube，Passive Optical Components

The 1550 nm dual-stage polarization-maintaining optical isolator is designed to protect polarization-sensitive lasers and optical systems from backward-propagating light. Its dual-stage configuration provides isolation of ≥45 dB while maintaining insertion loss of ≤0.9 dB across the specified 1550 ±15 nm operating wavelength range.

• Dual-stage PM optical isolator
• Operating wavelength of 1550 ±15 nm
• Insertion loss ≤0.9 dB
• Isolation ≥45 dB
• Extinction ratio ≥21 dB
• Return loss ≥55 dB
• Optical power handling up to 0.5 W
• Corning PM1550 fiber
• Slow-axis operation
• Fast-axis blocking
• Senko FC/APC connectors
• 0.9 mm blue fiber protection tubing
• Overall length of 100 ±10 cm, including connectors
• Compact Ø5.5 * 38 mm steel-tube package
• Direction arrow marked on the housing
• Identification tubing
• Neutral English test report
• Blister packaging
• Operating temperature from −5°C to +70°C

• Polarization-maintaining laser systems
• Fiber laser protection
• Optical amplifiers
• Polarization-sensitive optical modules
• Coherent optical systems
• Optical sensing equipment
• Interferometric systems
• Laboratory test and measurement setups
• PM fiber component assemblies
• Systems requiring suppression of backward reflections

An optical isolator is a directional component. The arrow indicates the permitted forward transmission direction. Installing the device in the reverse direction can result in high optical loss because backward-propagating light is intentionally blocked.

The isolator is configured to transmit light aligned with the slow axis of the PM1550 fiber while attenuating the orthogonal fast-axis polarization. This configuration helps maintain the required polarization state and supports an extinction ratio of at least 21 dB.