PolaStay POS-203 Reset-Free Polarization Stabilizer
Polarization stabilizer that holds a stable output SOP by maximizing or minimizing an optical or electrical feedback signal, with reset-free tracking.
- Wavelength range
- 1550, 1310, or 1060±50nm
- Calibrated Wavelengths
- 1550, 1310, 1060nm
- Operating Wavelength Range
- calibrated wavelength ± 50nm standard
- Insertion Loss
- 0.1 dB intrinsic, < 0.5 dB with connectors
Overview
The POS-203 Polarization Stabilizer keeps the output state of polarization (SOP) stable even when the feedback signal fluctuates. An algorithm changes the SOP dynamically to drive the supplied feedback signal to either its maximum or its minimum.
The instrument combines a fiber squeezer polarization controller with proprietary control algorithms. It can compensate for an input polarization discontinuity in as little as 5 ms. It can also track a continuous input SOP rotation of up to 32π/s without resets.
The POS-203 accepts either an optical or an electrical feedback signal. The user can adjust the step size, feedback delay, activation threshold and search mode (maximum or minimum) to tune the control cycle for a given application. These parameters are set up on the front panel.
Optical configuration
The POS-203 has three optical ports on the front panel: input, output and external optical feedback. A rear-panel BNC connector accepts an external electrical feedback signal. For a minimum search, a polarization beam splitter can monitor the output polarization of the user's device. For a maximum search, a polarizer followed by a PM coupler can do the same job. In both cases the monitor signal goes back to the stabilizer's feedback port. The POS-203 can hold any target polarization state, provided the user can generate a feedback signal whose maximum or minimum corresponds to that state.
Key Features
- Reset-free operation
- Maximum or minimum search, tunable control parameters
- Fast recovery time and tracking speed
- Front panel control parameter setup
- Low insertion loss
Specifications
| Wavelength range | 1550, 1310, or 1060±50nm |
|---|---|
| Calibrated Wavelengths | 1550, 1310, 1060nm |
| Operating Wavelength Range |
calibrated wavelength ± 50nm standard
For standard versions with PM outputs; other wavelength ranges are available
|
| Insertion Loss |
0.1 dB intrinsic, < 0.5 dB with connectors
POS-203 polarization controller optical path
|
| Return Loss | > 50 dB |
| Isolation in Orthogonal Polarization | 20 dB |
| Minimum Optical Input |
-35 dBm
POS-203 optical feedback
|
| Optical Power Handling (polarization controller input) |
30 dBm
Standard version. Higher power ranges may be possible by special request.
|
| Optical Power Handling (optical feedback input) |
6 dBm
Standard version. Higher power ranges may be possible by special request.
|
| Optical ports |
3
Input, output, and external optical feedback
|
| Connector Type |
FC/PC, FC/APC, Others Specify
Ordering option
|
| SOP recovery time | < 5 ms (1.5 ms typical) |
|---|---|
| SOP rotation tracking speed |
32π/s
For optical feedback signal >-35 dBm
|
| SOP accuracy |
<0.1 dB
PM output fiber, after polarizer
|
| Repeatability |
< 0.1 dB
Output power fluctuation caused by SOP fluctuation after passing through a polarizer
|
| Front Panel Display | OLED graphic display |
|---|---|
| Electrical Feedback | BNC connector to accept 0 – 4.5 V analog voltage |
| Communication Interfaces | USB, Ethernet, RS-232, and GPIB |
| Operating Temperature | 0 to 50 °C |
|---|---|
| Power Supply | 100 – 240 VAC, 50 – 60 Hz |
| Dimensions | 2U 19 inch half rack width 14" (L) x 8.5" (W) x 3.5" (H) |
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Polarization performance testing of coherent receivers
- Polarization demultiplexing
- Elimination of polarization fading
- Coherent communication
Documents & Resources
Related Products
Reset-free polarization tracker module that holds a stable output SOP against input fluctuations, with internal or external feedback.
Benchtop polarization stabilizer that holds a stable linear output SOP and recovers from input polarization changes in under 5 ms.
Deterministic polarization controller and polarimeter that generates, maintains, scrambles and analyzes any state of polarization regardless of input SOP.