Polarization maintaining fiber switches (PM fiber optical switches) are passive optical devices that open or close an optical circuit, or switch the light beam from one fiber to another one. By utilizing high-precision optics and mechanical technology, LFIBER designs and manufactures polarization maintaining fiber optical switches that can operate over the visible VIS spectrum and NIR (or IR) spectrum. Within these polarization maintaining fiber switches, panda PM fibers are used for maintaining a well-defined state of polarization (SOP) of the light. 
 
This page is to introduce the polarization maintaining fiber switches controlled by TTL communication protocol. For the RS-232 or USB control version, click PM Fiber Optical Switch (RS232/USB).
 

Polarization Maintaining Fiber Switches, VIS-NIR Light Switching for PM Fiber Optical Systems

Typically, the NIR operating wavelengths of the polarization maintaining (PM) fiber optical switches include 2000nm, 1990nm, 1950nm, 1940nm, 1920nm, 1910nm, 1900nm, 1870nm, 1850nm, 1750nm, 1720nm, 1710nm, 1700nm, 1645nm, 1625nm, 1610nm, 1605nm, 1600nm, 1590nm, 1573nm, 1570nm, 1565nm, 1560nm, 1558nm, 1550nm, 1540nm, 1532nm, 1528nm, 1490nm, 1480nm, 1475nm, 1470nm, 1450nm, 1444nm, 1413nm, 1410nm, 1392nm, 1380nm, 1342nm, 1320nm, 1319nm, 1313nm,1310nm, 1300nm, 1275nm, 1268nm, 1208nm, 1177nm, 1122nm, 1120nm, 1112nm, 1105nm, 1085nm, 1080nm, 1064nm, 1060nm, 1055nm, 1053nm, 1047nm, 1040nm, 1035nm, 1030nm, 980nm, 976nm, 975nm, 965nm, 960nm, 946nm, 940nm, 938nm, 935nm, 930nm, 915nm, 914nm, 905nm, 885nm, 880nm, 879nm, 860nm, 852nm, 850nm, 845nm, 835nm, 830nm, 825nm, 810nm, 808nm, 800nm, 795nm, 793nm, 790nm, 786nm, 785nm, 780nm, etc.
 
Typical VIS wavelengths of the polarization maintaining fiber switches include 770nm, 760nm, 750nm, 730nm, 721nm, 705nm, 698nm, 690nm, 689nm, 688nm, 685nm, 680nm, 671nm, 670nm, 666nm, 665nm, 660nm, 656nm, 655nm, 650nm, 647nm, 642nm, 640nm, 638nm, 637nm, 635nm, 633nm, 632nm, 630nm, 627nm, 622nm, 612nm, 607nm, 604nm, 600nm, 594nm, 593.5nm, 589nm, 588nm, 577nm, 561nm, 556nm, 555nm, 552nm, 550nm, 543nm, 540nm, 532nm, 530nm, 526nm, 523nm, 522nm, 520nm, 515nm, 514nm, 510nm, 509nm, 505nm, 501nm, 491nm, 490nm, 488nm, 484nm, 480nm, 473nm, 470nm, 465nm, 462nm, 460nm, 457nm, 454nm, 450nm, 447nm, 445nm, 444nm, 405nm, etc.
 

 

Polarization Maintaining Fiber Optical Switches

Panda PM Fiber, VIS-NIR Spectrum, TTL Version

Polarization Maintaining Fiber Switches
USER MANUAL

FEATURES OF POLARIZATION MAINTAINING FIBER SWITCHES (PM OPTICAL SWITCH)

  • Low Insertion Loss and High Reliability
  • Parallel Interface (TTL)
  • Modularized Design
  • Functions of Breakdown Self-checking and Alarm Warning (TTL)

APPLICATIONS OF POLARIZATION MAINTAINING FIBER OPTICAL SWITCHES

  • Optical Signal Switching and Routing
  • Optical Network Monitoring
  • Testing of Fiber Optic Component
  • OTDR Testing

Specifications of the Polarization Maintaining Fiber Switches
Number of Channels (N)1×N (N ≤ 16) or other channel counts on request
Fiber TypePanda PM fibers
Insertion Loss (dB)≤ 2.0 dB @ 430-670 nm
≤ 1.5 dB @ 780-1250 nm
≤ 1.0 dB @ 1260-1590 nm
≤ 1.5 dB @ 1600-2000 nm
Extinction Ratio (dB)≥ 20 dB @ 1260-1590 nm
Operating Wavelength Range (nm)430-2000 nm on request
Testing Wavelength (nm)405, 450, 480, 532, 650, 780, 850, 980, 1310, 1490, 1550, 1625, 1650, etc.
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 Supply5V / 500mA
Control ModeTTL
ConnectorFC, 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 wavelength range, control mode, etc.
  • Typically, the operating wavelengths of the polarization maintaining fiber switches include, but are not limited to, 405nm, 444nm, 445nm, 447nm, 450nm, 454nm, 457nm, 460nm, 462nm, 465nm, 470nm, 473nm, 480nm, 484nm, 488nm, 490nm, 491nm, 501nm, 505nm, 509nm, 510nm, 514nm, 515nm, 520nm, 522nm, 523nm, 526nm, 530nm, 532nm, 540nm, 543nm, 550nm, 552nm, 555nm, 556nm, 561nm, 577nm, 588nm, 589nm, 593.5nm, 594nm, 600nm, 604nm, 607nm, 612nm, 622nm, 627nm, 630nm, 632nm, 633nm, 635nm, 637nm, 638nm, 640nm, 642nm, 647nm, 650nm, 655nm, 656nm, 660nm, 665nm, 666nm, 670nm, 671nm, 680nm, 685nm, 688nm, 689nm, 690nm, 698nm, 705nm, 721nm, 730nm, 750nm, 760nm, 770nm, 780nm, 785nm, 786nm, 790nm, 793nm, 795nm, 800nm, 808nm, 810nm, 825nm, 830nm, 835nm, 845nm, 850nm, 852nm, 860nm, 879nm, 880nm, 885nm, 905nm, 914nm, 915nm, 930nm, 935nm, 938nm, 940nm, 946nm, 960nm, 965nm, 975nm, 976nm, 980nm, 1030nm, 1035nm, 1040nm, 1047nm, 1053nm, 1055nm, 1060nm, 1064nm, 1080nm, 1085nm, 1105nm, 1112nm, 1120nm, 1122nm, 1177nm, 1208nm, 1268nm, 1275nm, 1300nm, 1310nm, 1313nm, 1319nm, 1320nm, 1342nm, 1380nm, 1392nm, 1410nm, 1413nm, 1444nm, 1450nm, 1470nm, 1475nm, 1480nm, 1490nm, 1528nm, 1532nm, 1540nm, 1550nm, 1558nm, 1560nm, 1565nm, 1570nm, 1573nm, 1590nm, 1600nm, 1605nm, 1610nm, 1625nm, 1645nm, 1700nm, 1710nm, 1720nm, 1750nm, 1850nm, 1870nm, 1900nm, 1910nm, 1920nm, 1940nm, 1950nm, 1990nm, 2000nm, etc. Other operating wavelength requirements are also available on request.
  • Unless otherwise specified, the slow axis of the fiber is aligned with the key of the fiber connector.
  • Standard port/channel counts of the polarization maintaining fiber switches: 1×2, 1×4, 1×8, 1×16, 1×24, 1×32, 1×48, 1×64, 1×128, etc. Other channel counts are available upon request.
  • Lfiber’s polarization maintaining fiber switches are 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 Fiber Switches

ZH 1.5mm 9P or DB-9 Male Connector

Pin No.I / OSignalDescriptions
1InputD0D0-D3 represent channel selection Bit0-Bit3; D0 is low; D3 is high.
2InputD1
3InputD2
4InputD3
5InputRESETTTL, Low level reset to channel 0.
High level means channel selection bits are effective.
6OutREADYTTL, Ready (High = not ready, Low = ready)
7OutERRORTTL, Error OR Failure , (High = error, Low = no error)
8PowerGNDGround
9PowerVCC5.0±5% VDC Power Supply (Max. 500mA)

 

Channel Selection Table of the Polarization Maintaining Fiber Switches
ChannelD0D1D2D3RESET
COM-0xxxx0
COM-100001
COM-210001
COM-301001
... ............1
COM-1410111
COM-1501111
COM-1611111

 

Dimensions of the Polarization Maintaining Fiber Switches

 

Port/Channel Amount (N) ≤ 8

Low-Loss Fiber-Optic Switch PM Polarization Maintaining Switches Bidirectional Optical Switch

Optical Switch PM Fiber Optical Switches Polarization-Maintaining Light Switching

Polarization Maintaining (PM) Fiber Switches with ZH connector (1.5mm Pitch, 9 Pin)

 

 

Port/Channel Amount (N) ≤ 12

Polarization Maintaining PM Fiber Optical Switches Fiber Channel Optical Switcher VIS-NIR PM Fiber Switches for Optical Systems

 

Fiber Optical Switches PM Fiber Switch Polarization Maintaining Light Switching

Polarization Maintaining (PM) Fiber Optical Switches with DB-9 Male Connector

 

 

Optical Route of the Polarization Maintaining Fiber Switches

Polarization Maintaining Fiber Switches PM Fiber Optical Fiber Switcher PMF Channel Light Switching

 

Control Chart of the Polarization Maintaining Fiber Switches

PM Fiber Switches 405 444 450 460 490 532 630 632 633 635 637 650 nm 688 780 793 808 830 835 850 905 915 935 940 976 980 nm Polarization Maintaining PM Fiber Optical Switch 1030 1040 1064 1080 1300 1310 1450 1490 1550 1590 1625 1950 2000 nm

 

Timing Diagram of Polarization Maintaining Fiber Switches

Polarization Maintaining Fiber Switches Optical Switcher PM Fiber Switching VIS NIR 405nm 444nm 450nm 460nm 490nm 532nm 630nm 632nm 633nm 635nm 637nm 650nm 688nm 780nm 793nm 808nm 830nm 835nm 850nm 905nm 915nm 935nm 940nm 976nm 980nm 1030nm 1040nm 1064nm 1080nm 1300nm 1310nm 1450nm 1490nm 1550nm 1590nm 1625nm 1950nm 2000nm

 

Operating Instructions

(1) The polarization maintaining fiber switches have TTL/CMOS parallel interface. To distinguish from each other, there is a mark of a number for each of the connectors. The switches are bidirectional in operation.

(2) The polarization maintaining 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 fiber switches 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 switches are 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 Fiber Switches
Number of ChannelsOperating WavelengthFiber TypeControl ModeFiber Pigtail LengthConnector
1x2444 nmPanda PM fibersTTL0.50 mNone
1x4450 nm1.00 mLC/UPC
1x8460 nm1.50 mLC/APC
1x16532 nmCustom …SC/UPC
Custom …630 / 632 / 633 nmSC/APC
635 / 637 nmFC/UPC
650 nmFC/APC
780 nmMPO Male
793 nmMPO Female
830 nmCustom …
835 nm
850 nm
905 nm
915 nm
935 nm
940 nm
980 nm
1064 nm
1080 nm
1300 nm
1310 nm
…
2000 nm
Custom …

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