Resonant cavity and thermal insulation laser employing same

Abstract

The invention discloses a resonant cavity and a thermal insulation laser employing the same. The resonant cavity comprises a first reflection structure and a second reflection structure which are correspondingly arranged, wherein a gain unit is arranged between the first reflection structure and the second reflection structure, a wrapping layer is arranged at an outer side of the gain unit, the gain unit comprises a waveguide structure and a temperature compensation structure, the waveguide structure is used for amplifying a light ray, the temperature compensation structure is used for compensating an optical path and is arranged in a slit of the waveguide structure and / or a side edge of the waveguide structure, and the waveguide structure and the temperature compensation structure are respectively made of a positive temperature coefficient material and a negative temperature coefficient material. In the resonant cavity, the waveguide structure and the temperature compensation structure respectively select the positive temperature coefficient material and the negative temperature coefficient material, and the wavelength of the resonant cavity can be maintained to be stable under different temperatures by employing the negative temperature coefficient material as compensation; and the effective refractive index of the gain unit of the resonant cavity will not change, the optical path is further maintained unchanged, and the output wavelength of the laser will not drift with a temperature.

Description

technical field [0001] The application belongs to the technical field of lasers, and in particular relates to a resonant cavity and an adiabatic laser using the resonant cavity. Background technique [0002] The resonant cavity is a cavity in which light waves are reflected back and forth to provide light energy feedback. As a necessary part of the laser, it is usually composed of two flat or concave spherical mirrors perpendicular to the axis of the working medium. [0003] The function of the resonant cavity is to select the light with a certain frequency and the same direction as the most preferential amplification, and suppress the light of other frequencies and directions. All photons that do not move along the axis of the resonant cavity will quickly escape out of the resonant cavity, and photons that move along the axis will continue to advance in the resonant cavity, and will continue to run back and forth through the reflection of the two mirrors to generate oscilla...

AI Technical Summary

Problems solved by technology

The material used for the gain structure 20' is a group III-V compound material, and the refractive index of this material will increase as the temperature increases. Therefore, under the condition of different temperatures, the effective refractive index of the gain structure in the resonator is also the same. will change, and thus the optical path of the resonator will change, causing the laser wavelength to drift with temperature

Images