WHAT IS PM OPTICAL SWITCH AND WHAT CAN WE DO BY UTILIZING THEM?

What is PM Optical Switch and what can we do by utilizing them?

What is PM Optical Switch and what can we do by utilizing them?

Blog Article

Polarization Maintaining Optical Switch (PM Fiber Switches) is a passive component possessing two or more ports that selectively transmits, redirects or blocks optical signals from a given input port to a given output port in an optical fiber transmission line. Fiber-Mart’s polarization maintaining (PM) fiber switches are fabricated from PM panda fibers and high-quality connectors that are compatible with industry standards. They are able to maintain a well-defined state of polarization (SOP) of the light.

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)
Notes:



      • 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




 

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.

Fibermart (Fiber-MART.COM), based in Hong Kong & United States, a global leading manufacturer and supplier in fiber optics, optical network, fiber cables solutions; also dedicates to fiber optic manufacturing, fiber processing and integrated fiber optic systems. Devoting on the research & development, design, manufacture fiber connectivity network solutions for private, company, carriers, ISPs, content providers and networks, has always engaged in high-performance and innovation.

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