Polarisation Stabilizer

Polarisation Stabilizer from General Photonics

The POS-202, POS-203 and POS-204 polarization stabilizers maintain stable output states of polarization (SOP) against rapid input SOP fluctuations, compensating for an input polarization discontinuity in as fast as 5 ms, or tracking without resets against a continuous input SOP rotation of up to 32?/s. The POS-20X architecture includes a polarization controller, in-line polarization monitor, and proprietary algorithms.

The POS-203 has optical ports for signal input and output and a third port for an optical feedback signal. It automatically optimizes the output SOP to either maximize or minimize and optical or electrical feedback signal. It also allows the operator to control the step size, feedback delay, activation threshold, and search algorithm (maximum or minimum) from the front panel as well as remotely via one of the digital interfaces.

Features of the Polarisation Stabilizer 

• Reset free operation
• External feedback ports
• Tunable operation parameters
• Low insertion loss

Applications of the Polarisation Stabilizer 

• Eliminate polarization fluctuations in fiber systems
• Suppress noise figure in optical amplifiers
• Reduce PDL effects
• Demultiplex polarization division multiplexed channels
• Stabilize output SOP of high power laser amplifiers

Specifications of the Polarisation Stabilizer 

• Wavelengths: 1550 nm, 1310 nm, or 1060 nm
• Bandwidth¹: ± 50 nm
• SOP Recovery Time:< 5 ms (1.5 ms typical)
• SOP Rotation Tracking Speed²: 32 ?/s (endless tracking, reset free)
• SOP Accuracy³: < 0.1 dB (PM output fiber)
• Repeatability: < 0.1 dB
• Isolation in Orthogonal Polarization: 20 dB
• Insertion Loss: < 0.5 dB with connectors (0.1 dB intrinsic, polarization controller optical path)
• Return Loss: > 50 dB
• Operating Power Range: 
• Up to +30 dBm (POS-203 polarization controller optical path)
• -35 to +6 dBm (POS-203 optical feedback input)
• Front Panel Display: OLED graphic display
• Electrical Feedback: 0 -4.5V (BNC connector)
• Communication Interfaces: USB, Ethernet, RS-232, and GPIB
• Operating Temperature: 0 °C to 50 °C
• Storage Temperature: -20 °C to 70 °C
• Power Supply: 100 – 240 VAC, 50 – 60 Hz
• Dimensions: 2U, 19” half rack width 3.5”(H) x 8.5” (W) x 14” (L)

Notes: 

Specifications listed in table apply for standard 1310 or 1550nm operation at 23±5 °C

¹For standard versions with PM outputs.

²For input power >-25 dBm for POS-202.

³The output power fluctuation caused by SOP fluctuation after passing through a polarizer.