Gas chamber parameter

Detector parameter

Example of using a gas chamber to measure CO₂  gas

I. Test instrument connection and steps

Steps:

1. Install a 2004nm laser, and connect the laser output fiber to one end of the 20-meter optical path gas chamber. 

2. Connect the other end of the 20-meter gas chamber to the detector.

3.Use a BNC to SMA cable to connect the detector and the oscilloscope.

Turn on the laser, adjust the current and temperature, and view the second harmonic absorption spectrum of the CO₂ molecule on the oscilloscope.

2. Test results and analysis verification:

We adjusted the current and temperature of the laser to make the laser wavelength sweep across the absorption peak of the CO₂ molecule at around 2004nm, and measured the second harmonic absorption spectrum as shown in the figure below:

In order to verify that it is the absorption of CO₂ molecules, we queried the parameters of the Hritral database as follows:

We can see that the absorption peak in the database corresponds exactly to the absorption peak measured on the oscilloscope, which also verifies that the absorption spectrum on our oscilloscope is the absorption of CO₂ molecules.

Ordering Information

PL-20-S3-AR6-FSA 

Optical path: 20:20 meters

Material: S3:SUS304

Gas port diameter: AR6:6mm

Fiber optic and connector: FSA:SM2000, FC/APC