Polarization Maintaining (PM) Optical Switch
FEATURES OF POLARIZATION MAINTAINING OPTICAL SWITCH (PM FIBER SWITCHES)
- Low Insertion Loss and High Reliability
- Parallel Interface (TTL)
- Modularized Design
- Functions of Breakdown Self-checking and Alarm Warning (TTL)
APPLICATIONS OF POLARIZATION MAINTAINING (PM) OPTICAL SWITCH
- Optical Signal Switching and Routing
- Optical Network Monitoring
- Testing of Fiber Optic Component
- Military Communications
Specifications of the Polarization Maintaining (PM) Optical Switch
Channel Number (N) 1×N (N ≤ 16)
Fiber Type Panda PM fibers
Insertion Loss (dB) Typ: 0.5; Max: 0.8
Extinction Ratio (dB) ≥ 20
Operating Wavelength (nm) 1310-1550
Testing Wavelength (nm) 1310 or 1550
Return Loss (dB) ≥ 50
Crosstalk (dB) ≥ 70
Wavelength-Dependent Loss (dB) ≤ 0.25
Temperature-Dependent Loss (dB) ≤ 0.25
Repeatability (dB) ≤ 0.02
Lifetime (cycles) ≥ 10 million
Switching Time (ms) ≤ 8 (adjacent channel)
Power Handling (mW) ≤ 500
Power Supply 5V / 500mA
Control Mode TTL
Connector FC, LC, SC, ST, MPO, etc.
Operating Temperature (℃) -20 to +70
Storage Temperature (℃) -40 to +85
Dimension (mm) 80 × 40 × 32 mm (channel amount ≤ 8)
135 × 64 × 32 mm (channel amount ≤ 16)
- For requests please see the ordering information section and specify the number of channels, operating wavelengths, control mode, connector types, etc.
- Unless otherwise specified, the slow axis of the fiber is aligned with the key of the PM fiber connector.
- The polarization maintaining (PM) optical switch can be installed in 1U units on standard 19-inch racks. We offer customization upon request if needed.
- The above data are test results with connectors assembled.
- Lfiber’s polarization maintaining fiber optical switch (PM fiber switches) is customizable and the specifications are subject to change without notice.
- For product customization or special requirements, please contact our sales representative.
| Pin Configurations of the Polarization Maintaining (PM) Optical Switch |
|---|
ZH 1.5mm 9P or DB-9 Male Connector
| Pin No. | I / O | Signal | Descriptions |
| 1 | Input | D0 | D0-D3 represent channel selection Bit0-Bit3; D0 is low; D3 is high. |
| 2 | Input | D1 | |
| 3 | Input | D2 | |
| 4 | Input | D3 | |
| 5 | Input | RESET | TTL, Low level reset to channel 0. High level means channel selection bits are effective. |
| 6 | Out | READY | TTL, Ready (High = not ready, Low = ready) |
| 7 | Out | ERROR | TTL, Error OR Failure , (High = error, Low = no error) |
| 8 | Power | GND | Ground |
| 9 | Power | VCC | 5.0±5% VDC Power Supply (Max. 500mA) |
| Channel Selection Table of the Polarization Maintaining (PM) Optical Switch | |||||
|---|---|---|---|---|---|
| Channel | D0 | D1 | D2 | D3 | RESET |
| COM-0 | x | x | x | x | 0 |
| COM-1 | 0 | 0 | 0 | 0 | 1 |
| COM-2 | 1 | 0 | 0 | 0 | 1 |
| COM-3 | 0 | 1 | 0 | 0 | 1 |
| ... | ... | ... | ... | ... | 1 |
| COM-14 | 1 | 0 | 1 | 1 | 1 |
| COM-15 | 0 | 1 | 1 | 1 | 1 |
| COM-16 | 1 | 1 | 1 | 1 | 1 |
| Dimensions of the Polarization Maintaining (PM) Optical Switch |
|---|
Channel Amount (N) ≤ 8
PM Fiber Optical Switch with ZH connector (1.5mm Pitch, 9 Pin)
Channel Amount (N) ≤ 12
PM Fiber Optical Switch with DB-9 Male Connector
| Optical Route of the Polarization Maintaining Fiber Optical Switch |
|---|
| Control Chart of the Polarization Maintaining (PM) Optical Switch |
|---|
| Timing Diagram of the Polarization Maintaining (PM) Optical Switch |
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Operating Instructions
(1) The polarization maintaining (PM) optical switch has TTL/CMOS parallel interface. To distinguish from each other, there is a mark of a number for each of the connectors. The switch is bidirectional in operation.
(2) The PM fiber switches can be controlled via TTL/CMOS parallel interface with a DB-9 connector. See the Pin Specifications and Control Chart to set the connection correctly before operations.
(3) When supply power to the PM fiber switch, it will reset the 0 channel. When /READY and ERROR signals become low, the switch is ready for the data or the reset signal.
(4) Channel Selection: Set /READY signal high and then connect the data lines to select the channel. Whenever the data exceed N (the max channel of the switch), the ERROR signal becomes high, until a correct data occurred or RESET signal is given. The switch will monitor the data lines, and switch to the position specified by the data lines.
(5) Reset Operation: Set /RESET signal low, and the device will switch to the open position. /READY and ERROR signals become low after reset operation. Never try to keep /RESET signal low all the time otherwise the polarization maintaining (PM) optical switch will repeat the reset operation until the signal goes high. The low level on the /RESET pin should not exceed 20ms.
(6) The /READY signal keeps high when the polarization maintaining fiber optical switch is in operation (switching) and it becomes low after operations. The ERROR signal keeps high when an invalid data appears on the data line and it becomes low after reset operation or input a valid data. To understand the device’s operation situation, the /READY and ERROR signal should be monitored although D0~D3 data lines are enough for the simplest application.
Ordering Information for the Polarization Maintaining (PM) Optical Switch
Polarization Maintaining Fiber Optical Switch Port/Channel Number Test Wavelength Fiber Type Control Mode Fiber Length Connector
1×N (N ≤ 16) 1310 nm Panda PM fibers TTL 0.50 m None
Custom … 1550 nm 1.00 m LC/UPC
Custom … 1.50 m LC/APC
Custom … SC/UPC
SC/APC
FC/UPC
FC/APC
MPO Male
MPO Female
Custom …
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