An optical resonant cavity composed of non-parallel mirrors and a method for generating optical resonance

Abstract

The invention provides an optical resonant cavity formed by non-parallel reflecting mirrors and a method for generating optical resonance. The optical resonant cavity comprises a top reflecting mirror and a bottom reflecting mirror, and is characterized in that a cavity is formed between the top reflecting mirror and the bottom reflecting mirror, and the cavity is filled with a medium; the top reflecting mirror comprises two oppositely arranged plane reflecting mirrors, and the two plane reflecting mirrors have the same inclination angle relative to the bottom reflecting mirror; and the bottom reflecting mirror is a plane reflecting mirror. According to the invention, the resonant cavity is provided with the inclined top reflecting mirror, so that an incident beam perpendicular to the bottom reflecting mirror is enabled to be increased in optical path during reproduction in the process of advancing in the resonant cavity. The optical resonant cavity provided by the invention has different resonance conditions from a parallel plane resonant cavity, and can acquire small linewidth and a greater Q-value. In addition, the optical field energy can be effectively controlled within a certain area, and the diffraction loss is reduced.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an optical resonant cavity composed of non-parallel mirrors that can be used in optoelectronic devices such as lasers or filters, and a method for generating optical resonance. Background technique [0002] Since the advent of laser technology, the research on optical resonators has attracted much attention, and its theory and application have greatly promoted the development of modern optical technology. The optical resonator is an important part of the laser, and its main function is to provide optical positive feedback and control the oscillating beam. In addition, optical resonators are also widely used, designed and improved in photodetectors, filters, and photosensors. Resonators that meet various needs and have excellent performance have always been a research hotspot. [0003] In the prior art, common resonators include parallel plane optical resonators and spher...

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Problems solved by technology

[0003] In the prior art, common resonators include parallel plane optical resonators and spherical optical resonators. Parallel plane optical resonators are simple to manufacture, have good beam directionality, and relatively uniform light field distribution in the cavity. The loss and geometric loss are relatively large; the spherical optical resonator has a small diffraction loss compared to the parallel plane resonator, and it is easy to obtain a single-ended output and collimated parallel beam, but the beam intensity distribution is not uniform, and the manufacturing process is more complicated

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