Method for reducing etalon effect of laser device system

Abstract

The invention discloses a method for reducing the etalon effect of a laser device system. The method comprises the steps as follows: a DC bias circuit and a modulation signal generator are connected with an electrode of a laser device separately; the DC bias circuit is used for driving the laser device and provides the laser device with current carriers for pumping; a resonant cavity is arranged in the laser device, converts the current carriers for pumping into photons and carries out stimulated radiation to form stable laser output; the DC bias circuit and a modulation signal are injected into the laser device; the modulation signal generator outputs the modulation signal; and the modulation signal is matched with a parasitic parameter of the laser device to change the distribution state of the photons in the resonant cavity of the laser device. According to the method, power fluctuation of the laser device within a short period of time due to the etalon effect is reduced from the space and time; the stability of the overall laser device system is ensured; and the method has the advantages of being low in cost, easy to assemble and adjust, stable in performance and the like.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a method for reducing the etalon effect of a laser system. Background technique [0002] Due to its high brightness, high coherence and high collimation, laser has played a unique and vital role in the fields of industry, communication, medicine, scientific research and social life. However, in some situations where the stability of the laser is relatively high, the laser window or the optical path shaping element will produce an etalon effect that affects the stability of the laser output beam. [0003] Single-mode laser diodes, for example, a DFB (distributed feedback laser) or VCSEL (vertical-cavity surface-emitting laser) utilizing diode tunability in emission wavelength. The laser oscillator part is susceptible to reflections due to the etalon effect The influence of light; and further, the fluctuation of the refractive index of the active region caused by the carrier fluctu...

AI Technical Summary

Problems solved by technology

This method can reduce the instability of the output beam of the laser system caused by the etalon effect, but the implementation process is complicated, because there are dynamically moving components in the system, and it is easy to cause system instability caused by the existence of dynamic components in the process. Instability factors, and the drive circuit that powers the dynamic components in the process, also cause redundancy and uncertainty in the system

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