Externally controlled UV laser power stabilization system

Abstract

The invention discloses an outer control ultraviolet laser power stabilizing system, mainly for solving the problem that the existing laser power stabilizing system is low in stability. The outer control ultraviolet laser power stabilizing system comprises an ultraviolet laser light source system (1), an ultraviolet environment control room (2), an electrooptical modulator (22), a sampler (26), an optical chopper (3), an optical filter (4), a photoelectric preamplifying module (5), a feedback control module (6), an electrooptical modulation driver (7) and a laser power detector (8), wherein the ultraviolet laser light source system outputs ultraviolet laser power of which needs to be stabilized, the ultraviolet laser the power of which needs to be stabilized passes through the electrooptical modulator (22), the ampler (26), the optical chopper (3) and the optical filter (4) and vertically reaches an photoelectric detector to generate electric signals; the electric signals generate feedback signals through the feedback control module, to control the electrooptical modulation driver to adjust the electrooptical modulator to stabilize the ultraviolet laser power. The outer control ultraviolet laser power stabilizing system is high in stability, and is suitable for stabilizing the ultraviolet laser power with wave bands of 250-400nm.

Description

technical field [0001] The invention belongs to the field of laser technology, and specifically relates to a photoelectric system for realizing stable control of ultraviolet laser power by using a signal feedback mechanism, and is mainly used for realizing high-precision stabilization of the output optical power of ultraviolet lasers. [0002] technical background [0003] Ultraviolet lasers are widely used in scientific research, industry, military, medical and many other fields, and the stability of ultraviolet laser power is a key factor in these applications. In actual use, when the ultraviolet laser is affected by factors such as power supply current fluctuations, cavity mirrors, laser mode hopping, and environmental temperature changes, it will cause fluctuations in the output power of the laser, that is, the instability of the output power of the laser. No matter what the reason is, the laser power change is reflected in the output beam as a synthetic effect, that is, ...

AI Technical Summary

Problems solved by technology

However, the common shortcomings are that it is stable for 632.8nm visible laser, and it is not suitable for ultraviolet laser; the details of the optical path are not rigorous enough. When the laser is transmitted in space, it is often caused by defects on the optical components or air Scattering due to dust, failure to effectively deal with the scattering; failure to effectively control the photoelectric detection environment, making the measurement inaccurate, dark current, noise, etc. are greatly affected by the environment; the electrical signal processing process is cumbersome and noisy

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