Micro-ring resonant cavity-based multi-refractive-index PT symmetric grating laser

Abstract

The invention discloses a micro-ring resonant cavity-based multi-refractive-index PT symmetric grating laser and belongs to the laser technical field. The laser includes an outer shell; the bottom ofthe outer shell is fixedly connected with a mounting plate; limiting plates located in the outer shell are fixedly connected to the front surface and back surface of the top of the mounting plate; thetops of the two limiting plates are movably connected with first U-shaped plates respectively; the tops of the first U-shaped plates are fixedly connected with a fixing frame; and an inner shell is fixedly connected between the two inner walls of the fixing frame. According to the micro-ring resonant cavity-based multi-refractive-index PT symmetric grating laser of the invention, laser is vibrated back and forth in a resonant cavity, so that the light source is coupled multiple times, and therefore, the stability of the laser is improved, reliability is improved, practicability is higher; thepositions of the fixing frame, a beam expander and a Q switch can be adjusted leftwards and rightwards, and therefore, the diameter and divergence angle of a laser beam can be controlled, and flexibility is improved; and the light transmittance of the laser can be adjusted, so that the device can be suitable for different working environments and has higher applicability.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a PT symmetrical grating laser based on a microring resonator cavity with multiple refractive indices. Background technique [0002] A laser refers to a device capable of emitting laser light. According to the working medium, lasers can be divided into four categories: gas lasers, solid-state lasers, semiconductor lasers and dye lasers. Recently, free electron lasers have also been developed. High-power lasers are usually pulsed In addition to the free electron laser, the basic working principles of all kinds of lasers are the same. The indispensable conditions for generating laser light are that the number of particles is reversed and the gain is greater than the loss, so the essential components in the device have excitation (or Pumping) source and working medium with metastable energy level. The excitation is that the working medium absorbs external energy and is excited to an ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a multi-refractive index PT symmetric grating laser based on a microring resonator, which solves the problem that the laser is easily unstable, affects the normal use of the laser, and the light transmittance cannot be adjusted, so it can only be applied to In the same working environment, the controllability is poor, which reduces the problem of practicality

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