• Oxygen 20m long path gas compact absorption cell 700-800nm

    The oxygen gas long optical path gas absorption cell is used for spectral analysis and detection of oxygen gas. The main body adopts the Herriot Gas Cell with excellent optical stability, and the auxiliary and high-stability optical packaging structure is mainly composed of the gas chamber cavity, concave reflector, standard optical fiber connector, optical detector, gas inlet and outlet, and shockproof base. The unique suspension circuit design has excellent vibration and temperature stability, can work in various complex environments, and is very suitable for real-time detection of gas lines. It has ultra-low system noise and can be used for trace gas analysis.

    产品特点Optical fiber signal input, optical detector electrical signal output、 The gas chamber structure is stable and resistant to vibration, external extrusion, and insensitive to ambient temperature changes、 The optical fiber collimator and detector are directly integrated in the gas chamber, no optical path adjustment is required, and the operation is simple、 The gas chamber is small in size and compact in structure, easy to carry、 Long effective optical path and low noise

    产品货号H80060007

    应用领域Ultra-high precision gas detection instrument 、 TDLAS extraction analysis

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    Daisy

    电话:18602170419

    邮箱:moli@microphotons.com

    主要参数
  • 核心参数
  • 尺寸图
  • Parameter

    Parameter

    Technical specification

    Effective optical path

    20 meters

    Gas volume

    571ml

    Wavelength range

    700-800nm

    Lens coating

    AR dielectric film (>99.8%)

    Optical interface

    FC/APC

    Gas interface

    Φ6 quick plug

    Insertion loss

    ≤3dB@760nm 22℃

    Maximum input optical power

    500mW@760nm

    Operating temperature

    -10℃-﹢85℃

    Dimensions

    339mm*89mm*104mm

    Total product weight

    2700g

    Storage temperature

    -40℃-﹢85℃

    Pressure resistance

    0.7MPa

     


    Built-in photodetector parameters

    Parameter

    Symbol

    Condition

    Indicator

    Unit

    Cut-off frequency

    Fc

    VR=10V

    25

    MHz

    Reverse voltage

    Vr

    -

    ≤20

    V

    Responsivity

    S

    750nm 22℃

    0.5

    A/W

    Dark current

    ID

    Tc=22℃,VR=10V

    ≤2

    nA

    Junction capacitance

    Ct

    VR=10V,f=1MHz

    3

    pF

     


    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

    60487c2aa724a.jpeg


    Line connection:

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

    (2) Connect the voltage conversion module 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 output end of the optical path cell to the input end of the voltage conversion module

    (5) Connect the output end of the voltage conversion module to the PREAMP end of the control box (i.e., the  preamplifier end)

    (6) Connect TRIG OUT to oscilloscope channel 1

    (7) Connect DAC OUT to oscilloscope channel 2

    (8) Turn on the laser and observe the second harmonic signal of oxygen absorption on the oscilloscope

     


    Ordering Information

    PL-20-760-AR6-SA-SMA Effective optical path: 20: 20 meters

    Working wavelength: 760: 700-800nm,

    Lens coating: AR: AR dielectric film (>99.8%), Fiber type and interface: SA: HP780, FC/APC Export: SMA

     

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