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    • DTS uses a dual-channel APD photodetector

    The DTS-APD2 module integrates two sets of single-mode/multi-mode WDM and APD photodetectors, widely used in distributed optical fiber temperature sensing to detect Stokes and Anti- Stokes signal light respectively.

    Product features：Proprietary dual-channel design; optimized for Raman signals; high gain and low noise; built-in temperature compensation; wide bandwidth and low NEP

    Part Number：MP-DTS-APD2-I-SM-M

    Application area：Distributed Fiber Temperature Measurement (DTS) | Fiber Optic Vibration/Acoustic Monitoring (DVS/DAS) | Optical Communication and OTDR | Optical Communication and OTDR

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    Main parameters
  • Core parameters

  • Operating wavelength Tape width

    900-1700nm 150MHz

  • Dimension Drawing
    • General Parameters

    The module incorporates an integrated temperature and pressure control module, ensuring that the APD photodetector chip remains in a constant operating state with minimal temperature drift and low noise levels. To handle weak signals, the module employs multi-stage amplification and noise suppression techniques, delivering high-quality output signals and enhancing the system's signal-to-noise ratio.

    The detector module operates on a single DC+5V power supply and incorporates high-precision drive circuits and logic control circuits, allowing work parameters to be configured via the serial port and host computer.

     

    1778291930289399.png 

    Figure1 : Principle Block Diagram ofthe DTS-APD2 Photodetector

    As shown in Figure 1, this module integrates functional modules including 1450 nm

    and 1650 nm WDMs,low-noise APD multi-stage amplification circuits, and control circuits


    Parameter:

    Parameter

    Unit

    Least value

    Representative value

    Crest value

    APD Photodetector Specifications

    Operating wavelength

    nm

    00

    -

    1700

    Responsiveness

    A/W

    -

    8.5

    20

    Snow avalanche voltage VBR

    V

    40

    -

    60

    Dark current

    nA

    -

    2

    10

    Tape width

    MHz

    -

    150

    -

    Photoelectric current responsivity

    mV/nA

    -

    100

    -

    WDM optical index

    Operating wavelength

    nm

    1450 & 1550 & 1660

    Band range

    nm

    1443-1457 & 1553-1557 & 1645-1685

    Insertion loss

    dB

    -

    -

    1.2

    1460/1550+1660 Isolation degree

    dB

    60

    -

    -

    1660/1550 + 1450 Isolation degree

    dB

    60

    -

    -

    Stability of insertion loss temperature

    dB/℃

    -

    -

    0.005

    Wavelength Stability

    nm/℃

    -

    -

    0.003

    Return loss

    dB

    45

    -

    -

    Power Carrier

    mW

    -

    -

    500

     

    Work Environment

    Parameter

    Unit

    Least value

    Representative value

    Crest value

    Operating temperature range

    ℃

    -10

    +25

    +60

    Storage temperature range

    ℃

    -40

    +25

    +85

    Relative humidity

    %

    5

    40

    90

     

    Power Specification

    Parameter

    Unit

    Least value

    Representative value

    Crest value

    Service voltage

    V

    4.75

    5

    5.25

    Current

    A

    -

    0.8

    -

    Power dissipation

    W

    ≤20


    Interface Definition

    Interface type

    Label

    Explain

    Interface type

    Source

    DC+5V/GND

    Module Power Supply

    AFR-250 Silver-plated Copper Wire

    Pilot lamp

    LED (green)

    Work Indicator Light

    Normal: periodic flickering

    LED（ red ）

    Alarm indicator

    The red light is always on as an alarm.

     

    Fiber Optic Interface

    IN

    Laser input port

    900 μm  sleeve  single-mode fiber, FC/APC connector

    OUT

    End sensing optical fiber

    900 μm  sheathed multimode fiber, FC/APC connector

     

    Signal output port

    S+

    Stokes optical signal differential +

    SMA Template

    S-

    Stokes optical signal differential-

    SMA Template

    AS+

    Anti-Stokes optical signal differential +

    SMA Template

    AS-

    Anti-Stokes optical signal differential  -

    SMA Template

     

    Tail Fiber Specifications

    Project

    Explain

    Fiber Optic Type

    SMF 900μm sleeve (laser input end)   MMF

    900μm sleeve (sensor fiber end)

    Tail fiber length (mm)

    500±20 (customizable)

    Connection type

    FC/APC


    Optical Interface Tag

    Optical Interface

    Tag Text

    Tag Format

    Laser input port

    IN

    Casing

    Sensor optical fiber end

    OUT

    Casing


    Warning Label

    Warning Label

    Warning Content

    Tag format and position

    Laser safety warning label

    		图片4.png图片6.png

    Anti-static warning label

    		图片5.png

     

     

    Order Information:

    MP-DTS-APD2-I-SM-M

    SM = single-mode; MM = multimode 62.5/125; others are customized


    Optional Configurations

    --

    Downloads

    No resources available

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  • Product title: DTS uses a dual-channel APD photodetector
  • Product link: https://www.idealphotonics.com/product/detail/1321.html

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    • 10+ 10 Years of Experience
    • 50 50 + Countries Bussiness
    • 10000 10k + Diodes sold worldwide
    • 30 30+ Invention patent
    • 10 10+ Advanced Optical Solutions

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