Luna PSW-003/PSW-003-M High-Speed Self-Latching Polarization Switch and Switch Module
Solid-state, self-latching fiber polarization switch that rotates the SOP by 45° or 90° or converts linear to circular, with 45 µs typical switching
- Wavelength range
- 1550±30 nm or 1310 ±30nm
- Operation wavelength, C band
- 1550 nm (center wavelength λc) ±30nm
- Operation wavelength, O band
- 1310 nm (center wavelength λc) ±30nm
- Insertion loss
- 0.5 dB
Overview
The Luna PSW-003 is an all solid-state, self-latching polarization switch that switches between two output states of polarization (SOPs). Depending on the version, it rotates the SOP of incoming light by a fixed angle of 45° or 90°, or operates as a linear-to-circular converter, with a typical switching time of 45 µs.
The switch is driven by current pulses. Because it is self-latching, the output polarization state is maintained after each pulse with no holding current, so static power dissipation is zero and heat generation is minimal. Luna recommends a current-limited MOSFET H-bridge driver for the bare PSW-003 and does not permit DC drive.
The PSW-003-M module integrates the PSW-003 switch with a compact driver board powered from +12 VDC. The switch state is controlled with TTL logic levels on two input pins, so the user does not need to build a high-current driver circuit.
Both versions are available for the 1550 nm or 1310 nm band with SM or PM fiber pigtails and an optional input polarizer. The compact module is intended for OEM integration in polarization diversified detectors and sensors, polarization-sensitive OCT, OTDR and OFDR, polarization metrology and PMD monitoring.
Models in this series
| Model | Description | |
|---|---|---|
| PSW-003 |
Luna PSW-003 High-Speed Self-Latching Polarization Switch
Solid-state self-latching polarization switch that rotates the SOP by 45° or 90° or converts linear to circular, with 45 µs typical switching time. |
Details → |
| PSW-003-M |
Luna PSW-003-M High-Speed Polarization Switch Module with TTL Driver Board
Self-latching polarization switch module with integrated driver board, TTL logic control and 45 µs typical SOP switching time. |
Details → |
Key Features
- Digitally switched SOP
- Fast switching time 45 μs (typical)
- SOP repeatability 0.1°
- Self-latching
- Zero static power dissipation
- Compact
- Minimal heat generation
- 45° or 90° SOP rotation or linear-to-circular (LCP) conversion
- PSW-003-M module controlled by TTL logic levels from a +12 VDC supply
Specifications
Optical
| Wavelength range | 1550±30 nm or 1310 ±30nm |
|---|---|
| Operation wavelength, C band |
1550 nm (center wavelength λc) ±30nm
Wavelength ranges are center wavelength (λc)±30nm; rotation angles closest to ideal at center wavelength and room temperature |
| Operation wavelength, O band |
1310 nm (center wavelength λc) ±30nm
Wavelength ranges are center wavelength (λc)±30nm; rotation angles closest to ideal at center wavelength and room temperature |
| Insertion loss |
0.5 dB
Max; values referenced without connectors |
| State dependent loss | 0.05 dB |
| Wavelength dependent loss | 0.1 dB |
| Return loss | -55 dB |
| SOP repeatability (on Poincaré sphere) |
±0.1°
PSW-003-M datasheet gives ±0.1 deg; PSW-003 datasheet prints the unit as dB |
| SOP rotation angle (center wavelength and 25°C) |
45±0.5 or 90±1 deg
Datasheet value; the web page lists 45±0.5° or 90±0.5° at λc, 23°C |
| SOP rotation angle (all wavelengths and temperatures) |
45 or 90±5 deg
Over all wavelengths and temperatures in the operational ranges |
| Rotation angle wavelength dependence, 45° 1550nm PSW | -0.065 deg/nm |
| Rotation angle wavelength dependence, 90° 1550nm PSW | -0.13 deg/nm |
| Rotation angle wavelength dependence, 45° 1310nm PSW | -0.085 deg/nm |
| Rotation angle wavelength dependence, 90° 1310nm PSW | -0.17 deg/nm |
| Rotation angle temperature dependence, 45° PSW |
-0.07 deg/°C
Same for 1310 and 1550nm PSWs |
| Rotation angle temperature dependence, 90° PSW |
-0.14 deg/°C
Same for 1310 and 1550nm PSWs |
| Optical power handling | 300 mW |
|
Input / output fiber
PSW-003 |
SM or PM
Polarizer is standard for PM input devices; SM input devices have no polarizer |
Switching Time
| SOP switching time | 45 µs typical (@10 V bias) |
|---|---|
|
SOP switching time at bias voltage 10V
PSW-003 |
40 / 45 / 50 µs (min / typ / max) |
|
SOP switching time at bias voltage 5V
PSW-003 |
70 / 80 / 100 µs (min / typ / max) |
|
SOP switching time at bias voltage 3.3V
PSW-003 |
90 / 120 / 150 µs (min / typ / max) |
|
SOP switch time
PSW-003-M |
40 / 45 / 50 µs (min / typ / max)
Power supply 12V |
|
SOP switch delay time
PSW-003-M |
20 / 25 µs (min / typ)
Power supply 12V |
Electrical (PSW-003)
|
Drive signal pulse width at bias voltage 10V
PSW-003 |
50 to 130 µs
Pulse width required to switch and latch the SOP |
|---|---|
|
Drive signal pulse width at bias voltage 5V
PSW-003 |
110 to 550 µs |
|
Drive signal pulse width at bias voltage 3.3V
PSW-003 |
170 to 1000 µs |
|
Peak pulsed drive current at bias voltage 10V
PSW-003 |
65 to 150 mA |
|
Peak pulsed drive current at bias voltage 5V
PSW-003 |
60 to 150 mA |
|
Peak pulsed drive current at bias voltage 3.3V
PSW-003 |
55 to 110 mA |
|
Self-latching current
PSW-003 |
0 mA
No current required to maintain SOP after latching |
Electrical (PSW-003-M)
|
Power supply voltage
PSW-003-M |
11 / 12 / 15 V (min / typ / max)
Pin definition: +12V± 1.0V power supply input |
|---|---|
|
Logic pin signal pulse width
PSW-003-M |
50 / 80 / 1000 µs (min / typ / max) |
|
Signal input resistance
PSW-003-M |
50K
Drive logic inputs A_IN and B_IN |
|
Average current, 1KHz switch frequency
PSW-003-M |
5.7mA
Power supply +12VDC |
|
Average current, 1Hz switch frequency
PSW-003-M |
2.1mA
Power supply +12VDC |
|
Electrical connector
PSW-003-M |
Harwin M50-3530442 or equivalent (4-pin, 1.27mm pitch) |
Absolute Maximum Ratings
| Optical input power | 300 mW |
|---|---|
|
Power dissipation
PSW-003 |
1 W |
|
Peak drive current
PSW-003 |
150 mA
Maximum allowed instantaneous current during a drive pulse |
|
Pulse width at bias voltage 10V
PSW-003 |
130 µs
Pulse width at which the maximum instantaneous current may reach 150 mA |
|
Pulse width at bias voltage 5V
PSW-003 |
550 µs |
|
Pulse width at bias voltage 3.3V
PSW-003 |
1000 µs |
|
Power supply voltage (DC)
PSW-003-M |
11 to 13 V |
|
Quiescent current
PSW-003-M |
2.0 mA |
|
Operating current
PSW-003-M |
45 mA
Alternating switching frequency 8KHz |
|
Maximum transient current
PSW-003-M |
160 mA
<1µ |
|
Pulse width at power supply voltage 12V
PSW-003-M |
50 to 1000 µs |
Environmental and Physical
| Operating temperature | 0 to 50 °C |
|---|---|
| Storage temperature | -40 to 85 °C |
| Operational temperature elevation (worst case) |
5 °C
Switched continuously with 50 μs drive pulse width and interval |
|
Dimensions
PSW-003-M |
42(L) x 20.5(W) x 17.5(H) mm |
Applications
- Polarization diversified detectors and sensors
- Polarization sensitive OCT
- Polarization metrology
- Polarization sensitive OTDR and OFDR
- PMD monitoring
- Polarization modulation
- Polarization detection
- Fiber optic sensing
- Optical device test and characterization
- Manufacturing test of fiber optic assemblies
- OEM modules for fiber optic sensing
Options & Accessories
| Option | Description |
|---|---|
| 15 | Wavelength: 1550 nm |
| 13 | Wavelength: 1310 nm |
| 90 | SOP rotation: 90° |
| 45 | SOP rotation: 45° |
| LCL | Linear to LCP converter |
| SS | Fiber type: SM to SM |
| PP | Fiber type: PM to PM |
| PS | Fiber type: PM to SM |
| P | Input polarizer (slow axis) — For PM input |
| 0 | No polarizer — PSW-003-M ordering option |
| 1.0 | Pigtail length: 1.0 m |
| FC/APC | Connector type: FC/APC |
| NC | No connector — PSW-003-M ordering option |