A New Two-color Laser

Abstract

The invention discloses a new dual color laser device which helps overcome a problem that rotation speed of an optical grating in a laser device of the prior art is not uniform enough for ensuring stability of laser device modulation frequency. The new dual color laser device comprises two discharge glass tubes each including a discharge cathode, a discharge anode, an air inlet opening, an extraction opening, a cathode harmonic resonance cavity adjusting device, an anode output adjusting device and working gas; the cathode harmonic resonance cavity adjusting device comprising: a cathode cavity head inner ring, a cathode cavity head outer ring, a cathode cavity head sealing gland, a directional guide tube, a corrugated tube, a stepped shaft and a reflecting mirror device positioned on an end, close to the cathode cavity head inner ring, of the stepped shaft. According to the new dual color laser device, via an adjusting structure designed at a reflecting mirror end of the laser device, resonance of a laser device harmonic resonance cavity can be caused, power of the laser device can be enabled to reach an ideal value to ensure that frequency change of two laser devices which run synchronously can generate a difference frequency signal of a controlled MHz, and a rotating optical grating can be replaced.

Description

technical field [0001] The invention relates to a laser, in particular to a novel two-color laser. Background technique [0002] Most of the interferometers currently used are Mach-Zehnder type heterodyne interferometers. For heterodyne type interferometers, there must be phase modulation to generate the beat frequency required for heterodyne detection. Generally speaking, the typical technology is to use the method of rotating the grating. This method essentially uses the different angular speeds of a moving blazed grating to generate the Doppler effect, thereby causing a frequency shift of the reference track signal. This method is cheap, simple and reliable in structure, and the corresponding modulation frequency can be obtained only by changing the rotational speed of the rotating grating. However, due to the limitation of mechanical processing technology, the surface quality of the groove of the rotating grating is not fine enough, and the stability of the grating rota...

AI Technical Summary

Problems solved by technology

[0003] The invention overcomes the problem in the prior art that the rotation speed of the grating in the laser is not uniform to the stability of the modulation frequency of the laser, and provides a method that can replace the rotating grating and can generate megahertz frequency shifts, while ensuring large output power and a structural Relatively Simple DC CW Glow Discharge Novel Two-Color Laser

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