A prism-type resonant cavity intermode gain-loss ratio detection system and detection method

Abstract

The invention discloses a prism type detection system for loss and gain ratios between resonator modes and a detection method. The detection system comprises a prism type laser connected with a resonator mode state servo controller. Outgoing laser beams are projected to a double-light window photoelectric detector through a coupling output lens, the double-light window photoelectric detector is arranged on an open servo base which is respectively connected with an oscilloscope and a computer, and the open servo base is also connected with the resonator mode state servo controller. The method includes the steps that 1) the outgoing laser beams of the prism type laser are projected to the double-light window photoelectric detector; 2) the servo base exerts mechanical dithering; 3) dithering optical signals of the double-light window photoelectric detector are modulated and read through the oscilloscope; 4) the position, where the prism type laser outputs light, relative to the double-light window photoelectric detector is adjusted until two paths of signal amplitudes are the same; 5) the double-light window photoelectric detector collects light intensity signals, and the light intensity signals are input into the servo base; 6) the result is transmitted to the computer. The system is simple in visualization operation, convenient and fast to process and accurate in detection result.

Description

technical field [0001] The invention relates to the technical field of precision assembly, in particular to a detection system and detection method for the gain-loss ratio between modes of a prism-type resonant cavity. Background technique [0002] For the coherent detection laser light source with high performance and stability requirements - prism ring laser, whether the assembly position of each optical component is appropriate and consistent is directly related to the stability of the laser's performance during operation. This kind of laser has high requirements on the accuracy of the assembly position of key components. Generally, a deviation of tens of nanometers is enough to cause poor effects. Due to the small deviation, direct detection is very difficult. For this reason, the present invention designs a new detection scheme according to the working principle of the laser, that is, by detecting the gain-loss ratio of each oscillation mode (longitudinal mode) of the r...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a prism-type resonant cavity intermode gain-loss ratio detection system and detection method to solve the technical problem that the accuracy of the assembly position of each optical component is difficult to measure in the laser assembly process, so as to realize the detection of this high Effective control of laser assembly quality required for stable work