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    • 20m long pathlength gas compact absorption cell (1310-1670nm)

    The long optical path gas absorption cell can be used for spectral analysis and detection. It mainly adopts the Herriot gas cell structure and a stable optical packaging structure, which mainly includes the gas chamber cavity, concave reflector, standard optical fiber connector, shockproof base and gas inlet and outlet. The unique suspension path design can ensure the vibration and temperature stability of the gas chamber, and can monitor the gas absorption line in real time in various complex environments. It has ultra-low system noise and is convenient for trace gas analysis

    Product features：Optical fiber signal input, detector RF output、 The gas chamber has a stable structure, which can effectively prevent vibration and temperature effects、 The fiber collimator and detector are directly integrated into the gas chamber, without the need for optical path adjustment, and the operation is simple、 The gas structure is compact and small in size, which is easy to carry、 The structure is small in size, low noise、

    Part Number：--

    Application area：TDLAS extractive analysis、 Ultra-high precision gas detection instrument

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    Main parameters
  • Core parameters

  • Dimension Drawing
    • General Parameters

    Parameter

    Technical indicator

    Value

    Effective optical path

    20 meters

    Maximum beam diameter

    1.48mm

    Gas volume

    571mL

    Wavelength range

    1510~1650mn

    Lens coating

    AR dielectric film (>99.8%)

    Main material

    304 stainless steel and high borosilicate glass

    Gas interface

    Φ6 quick plug

    Insertion loss

    ＜2dB

    Return loss

    >60dB

    Outer dimensions

    295.4mm*82.9mm*92.53mm

    Total product weight

    2688g

     

    Built-in photodetector parameters

    Parameter

    Symbol

    Value

    Unit

    Forward current

    If

    10

    mA

    Backward voltage

    Vr

    30

    V

    Backward current

    Ir

    1

    mA

    Responsivity

    Re(VR=5V,入=1550nm)

    0.9

    mA/mW

    Dark current

    ID(Vr=5V)

    1

    nA

    Response time

    Tr(RL=50Ω, 0V)

    0.5

    ns

    Reverse breakdown voltage

    Vbr(Ir = 10 μA)

    30

    V

    Saturated optical power

    Ps(Vr=5V)

    6

    mW

    Operating voltage

    Vr

    0-10

    V

     


    Methods used

    Used with our voltage conversion module, the connection is as follows:

    The voltage conversion module needs to be loaded with ±12V DC voltage at the same time to work.

    60487b8e149d0(2).jpeg

     

    Laboratory testing of methane concentration

    60487b3ad557b.jpeg


    Line connection:

    (1) Connect the power cord and USB cable to the TDLAS control box

    (2) Connect the photodetector to the +-12V power supply

    (3) Connect the LASER OUT end of the control box to the optical path cell input fiber port

    (4) Connect the optical path cell output end to the photodetector input end

    (5) Connect the photodetector output end to the control box PREAMP end, i.e. the preamplifier end

    (6) Connect TRIG OUT to oscilloscope channel 1

    (7) Connect DAC OUT to oscilloscope channel 2

    (8) Pass a certain concentration of CH4 gas into the optical path cell


    60487b7747174.jpeg

    (Second harmonic)

     


    Optional Configurations

    --

    Downloads

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