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    • MEMS Optical Switch Module

    This model of optical switch module (hereinafter referred to as MEMS optical switch) is a module product with multi-channel optical path switching function. The MEMS optical switch product is an optical switch manufactured using the electrostatically driven micro-mirror scheme, featuring small size, fast response speed and stable performance, and can be widely used in various optical communication and testing systems.

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    • Optical Schematic Diagram

    图片2.png

     Figuer1. Optical Schematic Diagram

     

     

    Performance Parameters

    Parameters

    Unit

    SM

    MM

    Number of Channels

    CH

    2

    4

    8

    12

    16

    24

    36

    48

    64

    2

    4

    8

    12

    16

    Wavelength Range

    nm

    1260-1650

    850 ±30 / 1310 ±30

    Test Wavelength

    nm

    1310 or 1550

    850 or 1310

    Loss (Max)

    dB

    0.6

    0.8

    1.2

    1.2

    1.2

    1.6

    2.0

    2.5

    2.8

    0.6

    0.8

    1.2

    1.2

    1.2

    Temperature-Dependent Loss

    dB

    ≤0.3

    Polarization-Dependent Loss

    dB

    ≤0.2

    Return Loss

    dB

    ≥50

    ≥30

    Crosstalk

    dB

    ≥45

    ≥30

    Repeatability

    dB

    ≤0.05

    Switching Time

    ms

    ≤15

    Service Life

    Cycle

    ≥109

    Input Optical Power

    mW

    ≤500

    Drive Voltage

    V

    5

    Power Consumption

    mW

    ≤350

    Operating Temperature

    ℃

    -5~70

    Storage Temperature

    ℃

    -40~85

    Dimensions

    mm

    68x30x14±0.2

    Working Mode


    TTL/UART

    Note:

    1 Test at room temperature and SOP.

    2 Excluding connectors, 0.2dB for one pair connectors.

    3 IL is for single-band, Dual-band adds 0.3dB

    Table 1. Performance Specification Parameters

     


    Electrical Characteristics

    Serial Number

    Parameter

    Unit

    Min

    Typ

    Max

    1

    Supply Voltage

    V

    3

    /

    13

    2

    Digital I/O Logic High Level

    V

    2.0

    3.3

    3.6

    3

    Digital I/O Logic Low Level

    V

    0

    0.5

    0.8

     

     

    Mechanical Dimensions (Unit: mm)

     4 ≤ N ≤ 16 (0.9mm fiber optic protective sleeve):

    图片3.png

    Figure 2 Mechanical Dimensions Drawing (4 ≤ N ≤ 16)

     

     

     

    16 < N ≤ 24 (0.9mm fiber optic protective sleeve) or N ≤ 64 (bare fiber):

    图片4.png

    Figure 3. Mechanical Dimensions Drawing (16 ≤ N ≤ 24)

     


    24 < N ≤ 48 (0.9mm fiber optic protective sleeve):

    图片5.png

    Figure 4. Mechanical Dimensions Drawing (24 < N ≤ 48)

     

     

    Pin Definition

     

    Pin Number

    Pin Definition

    Pin Type

    Level Standard

    Function Description

    1

    VCC

    Power IN

    /

    DC 5V, positive power input

    2

    /RESET

    IN

    LVTTL

    Reset, active low, pulse width ≥ 0.5ms

    3

    /STROBE1

    IN

    LVTTL

    TTL strobe: active on falling edge

    4

    RX

    IN

    LVTTL

    Serial port receive

    5

    TX

    OUT

    LVTTL

    Serial port transmit

    6

    GND

    /

    /

    Signal ground

    7

    AGND

    Power IN

    /

    Power ground/analog ground

    8

    NC

    /

    /

    Forbidden electrical connection

    9

    D02

    IN

    LVTTL

    TTL input: data bit D0 input

    10

    D12

    IN

    LVTTL

    TTL input: data bit D1 input

    11

    D22

    IN

    LVTTL

    TTL input: data bit D2 input

    12

    D32

    IN

    LVTTL

    TTL input: data bit D3 input

    13

    D42

    IN

    LVTTL

    TTL input: data bit D4 input

    14

    D52

    IN

    LVTTL

    TTL input: data bit D5 input

    1.LVTTL strobe signal/STROBE: Defaults to high level; the falling edge triggers the parallel input data of LVTTL

    inputs D0~D5.

    2.LVTTL input signals/D0-D5: Default to low level; the corresponding relationship between pins and channels is

    detailed in Table 4.

    Table 3. Module Pin Definitions

     


    Data Bit Switching Logic Table

    Channel1

    D5

    D4

    D3

    D2

    D1

    D0

    COM1

    0

    0

    0

    0

    0

    0

    COM2

    0

    0

    0

    0

    0

    1

    COM3

    0

    0

    0

    0

    1

    0

    COM4

    0

    0

    0

    0

    1

    1

    COM5

    0

    0

    0

    1

    0

    0

    COM6

    0

    0

    0

    1

    0

    1

    COM7

    0

    0

    0

    1

    1

    0

    COM8

    0

    0

    0

    1

    1

    1

    COM9

    0

    0

    1

    0

    0

    0

    COM10

    0

    0

    1

    0

    0

    1

    ...

    ...

    ...

    ...

    ...

    ...

    ...

    COM64

    1

    1

    1

    1

    1

    1

    During use, the TTL control pins should be configured according to the actual number of optical paths.

    Table 4. Correspondence Table between TTL Control Pins and Channels

     


    Description of Communication Methods

    Communication Mode

    UART

    Baud Rate

    115200bps, 8 data bits, 1 stop bit, no parity bit.

    Command Encoding Format

    ASCII

    Table 5. Description of Communication Methods

     


    Overview of User Communication Command Set

    Command 1

    Function Description

    Return Information after Success 2

    Remark Description

    3

    Switch to channel x

    x is the channel number (0 ≤ x ≤ chnNum4)

    Query current channel

    x is the channel number (0 ≤ x ≤ chnNum4)

    Query number of channels

    x is the number of module channels (0 ≤ x ≤ chnNum4)

    Query module SN

    "a…z" is the module SN number

    Query module PN

    "a…z" is the module PN number

    1.All communication commands contain no space symbols, and all symbols are English symbols; please use uppercase letters.

    2.For more "return information" and operation examples, see Tables 8 to 10.

    3.Both the "CHN:x" command and LVTTL parallel port triggering can independently control channel switching. When x is 0, the module optical path resets.

    4."chnNum" is the maximum number of channels of the optical switch module.

    Table 6. Communication Command Set



    Operation Instructions

    LVTTL Parallel Digital I/O Control
    The corresponding relationship between the level of LVTTL control pins and channels is shown in Table 4. During use, the LVTTL control pins should be configured according to the actual number of optical paths of the optical switch.

    Time Characteristics:

    Parameter

    Minimum Value

    Unit

    Description

    T1

    1

    ms

    Minimum / GATE high time

    T2

    15

    ms

    Optical path switching time

    T3

    100

    us

    TTL_DATA setup time

    T4

    2

    ms

    TTL_DATA hold time

    Table 7. LVTTL Control Time Characteristics


    The logic control diagram is as follows:

    图片6.png

    Figure 5. TTL Control Timing Diagram



    1. Serial Port Control

    1.1. For the definition of each pin of the module, see Table 3.

    1.2. Connect the power cord. After power-on, the module is in a reset state with no output.

    1.3. Control method:

    1.3.1. Connect the serial communication line:

    1.3.2. Serial port settings: 115200 baud rate, 8 data bits, 1 stop bit, no parity.

    1.3.3. Input module commands as needed, and the commands will return information.



    Detailed Explanation of Command Set


    1.Detailed Explanation of User Communication

    Command Set Switching and Querying Channel Commands

    Command

    Return Information

    Explanation

     

     

    The module has been switched to channel x. (0 < x ≤ chnNum)

    Information returned when x is 0: the module stops outputting.

    The optical switch module initialization is not ready.

    The input channel number exceeds the range of the number of channels.

    The command is incorrect.

     

    The module returns the number of the current working channel.

    The module has no output.

    The command is incorrect.

    Note：

    1.    chnNumis the maximum number of channels of the mod

    Eg：

    1.The user enters "CHN:15" in the serial port assistant, the module switches to COM15 channel, and the serial port assistant returns "CHN:15".

    2.The user enters "" in the serial port assistant. Assuming that the module is conducting COM7 channel at this time, the serial port assistant returns "CHN:7".

     


    Command for querying the number of channels:

    Command

    Return Information

    Description

    The module returns the number of channels, where x is the number of channels.

    The command is incorrect.

    Eg：

    1. Assuming it is a 1x16 module, when the user enters "" in the serial port assistant, the serial port assistant will return "NUM:16".



    Query the SN number of the module:

    Command

    Return Information

    Description

    "a…z" is the SN number of the module.

    The command is incorrect.

    Eg：

    1.Assuming the SN number of the module is "2024111", when the user enters "" in the serial port assistant, the serial port assistant will return "MSN:2024111".



    Query the PN number of the module: 

    Command

    Return Information

    Description

    "a…z" is the PN number of the module.

    The command is incorrect.

    Eg：

    1.Assuming the PN number of the module is "2024111", when the user enters "PN?>" in the serial port assistant, the serial port assistant will return "MPN:2024111".

    Note: This module can only execute one command at a time. Usually, you need to wait for the module to return the corresponding information before entering the next command.

     

     

     

    Ordering info

    YFMS-A-B-C-D-E-F

    A

    B

    C

    D

    E

    F

    Channel

    Fiber Type

    Test Wavelength

    Tube Type

    Fiber Length

    Connector

    1x4：1x4

    1x8：1x8

    1x12：1x12

    1x16：1x16

    1x24：1x24

    1x36：1x36

    1x48：1x48

    1x64：1x64

    SM:G657A2

    M5：MM ，50/125

    M6：MM ，62.5/125

    X：Others

    850：850nm

    1310：1310nm

    1550：1550nm

    1315：1310nm&1550nm

    X：Others

    250: 250um

    900: 900um

    X: Others

    05：0.5±5cm 

    10：1.0m±5cm

     X：Others

    OO：None

    FC：FC/PC

    FA：FC/APC

    SC：SC/PC

    SA：SC/APC

    LC：LC/PC

    LA：LC/APC

    X：Others

     

     

     


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