Method and device for detecting laser wavelength based on Rayleigh Brillouin scattering
A technology of laser wavelength and Brillouin frequency shift, which is applied in the field of laser spectroscopy to achieve the effect of broadening the measurable band range, improving signal strength and reducing requirements
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[0014] as attached figure 1 As shown, the device includes a laser light source (1) with a wavelength to be measured, a digital pressure gauge (2), a reflector (3), a visible light laser (4) for calibrating the optical path, convex lenses (5, 9, 10, 12, 13, 15, 23), scattering cell (6), extinction (7), diaphragm (8), pinhole filter (11), F-P scanning interferometer array (14), fiber coupler (16), detection device (17), data acquisition card (18), temperature control system (19), F-P scanning controller (20), oscilloscope (21), computer (22); The visible light emitted by the laser (4) is reflected by the reflector (3) and focused on the center of the scattering cell by the convex lens (5), and then the measurement optical path is adjusted and the instrument is calibrated, and the laser (4) is turned off after completion; ) The laser light emitted by the convex lens (23) is focused on the scattering cell (6) and then interacts with the gas in the cell (with a large scattering cr...
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