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    • Modulator Bias Control Module     


    The WPCT-0030 Modulator Bias Control Module is specifically designed for lithium niobate modulators, providing stable control of the modulator's NULL point, PEAK point, and ±Quad points. Utilizing digital signal processing technology, this module features rapid locking speed, high precision, and a compact size ideal for integration, fully meeting the bias control requirements of microwave photonic modules.



    Product model


    Name Model Price

    Parameter


    Features

    ● Automatically and quickly lock the modulator bias voltage, stabilizing it at NULL, PEAK, or ±Quad points.

    ● Input voltage range: ±5 V to ±12 V

    ● Small size: 10.8 × 10 × 3.8 mm

    ● Equipped with serial communication and easy-to-set bias point

    Modulator Bias Control Module1.png

    Key Parameter

    Product Parameters (TA = 25°C)

    parameter

    symbol

    test condition

    least value

    representative value

    crest value

    unit

    input voltage

    ±Vin


    ±5

    ±10

    ±12

    V

    output

    IB


    30



    mA

    output voltage

    VB


    0


    Vin-1.5

    V

    Pilot   amplitude

    VSIN



    ±100


    mV

    Bias control accuracy

    σB



    ±1


    %

    Control   Loop



    P

    PI

    PID



    Maximum Absolute Rating Value

    Parameter Name

    symbol

    Rated Value

    unit

    DC Voltage

    Vin

    ±20

    V

    working temperature

    TA

    -55 ~ +125

    ℃

    storage   temperature

    Tstg

    -65 ~ +150

    ℃




    Dimensions and Pin definitions


    Modulator Bias Control Module2.png

    Figure 1: Simplified principle block diagram


    Pin Description

    pin

    Definition

    pin

    Definition

    1

    Vin/Input: Positive Voltage

    7

    MPD1-/Modulator input   backlight detection negative electrode

    2

    GND/Input   Ground

    8

    MPD2+/Modulator output backlight detection positive   electrode

    3

    -Vin/Input Negative Voltage

    9

    MPD2-/Modulator output   backlight detection negative electrode

    4

    Positive   terminal of the Bias+/Modulator Bias Voltage

    10

    DGND/Communication Location

    5

    Bias/Modulator Bias Voltage Negative Pole

    11

    TX/Communication Sender

    6

    MPD1+/Modulator input backlight detection positive   terminal

    12

    RX/Communication   Receiver


    Usage Instructions

    During welding, carefully refer to the pin definitions to avoid incorrect connections. When in use, both input and output terminals must be connected to nearby filter capacitors, with capacities no less than 10 μF.

    Be careful not to connect the power supply in reverse or cause a short circuit between the input/output terminals, as this may damage the circuit.

    Necessary ESD protection measures should be implemented to prevent electrostatic damage.



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