Narrow linewidth solid laser

Abstract

The invention discloses a narrow-linewidth solid laser. A laser resonant cavity input mirror, a lens and a laser resonant cavity output mirror are sequentially arranged along the output direction of a pumping source; the laser resonant cavity input mirror is plated with a dielectric film with high transmittance for pump light and high reflectivity for laser, and the laser resonant cavity input mirror and the laser resonant cavity output mirror form a resonant cavity; the lens is plated with a laser wave band antireflection film; an antireflection film for a pumping wave band and a laser wave band is plated on a light passing surface of the laser gain medium, and the laser gain medium is arranged between the laser resonant cavity input mirror and the lens; the quartz coupling prism and the echo wall cavity are adjacent to each other on a coupling interface and are arranged between the lens and the laser resonant cavity output mirror; one side surface of the quartz coupling prism close to the lens is an incident surface, one side surface of the quartz coupling prism close to the output mirror of the laser resonant cavity is an emergent surface, the incident surface and the emergent surface are respectively plated with an antireflection film of a laser band, and the bottom surface generates total reflection. The laser is simple in structure, small in size, easy to integrate, narrow in line width, low in noise, high in reliability and good in stability.

Description

technical field [0001] The invention belongs to the technical field of solid-state lasers, and in particular relates to a narrow-linewidth solid-state laser. Background technique [0002] All-solid-state narrow-linewidth lasers have the characteristics of narrow frequency linewidth, low noise, good coherence, good stability, and excellent beam quality. Wave detection and other fields have broad application prospects, and become a research hotspot in the field of lasers in recent years. In the case of free operation, due to the inherent characteristics of the generally wide fluorescence emission spectrum of solid-state lasers, the phenomenon of multi-longitudinal mode oscillation will occur in solid-state lasers. This is because in the laser resonator, different longitudinal modes of the wide fluorescence emission spectrum use different parts The number of inversion particles of the laser beam starts to oscillate at the same time, thereby forming multi-mode oscillations in t...

AI Technical Summary

Problems solved by technology

However, the commonly used etalon method-Pertinoid cavity is usually large in size and not easy to integrate, and the cavity mirror with high reflectivity is expensive and requires a complex stabilization device, which severely limits the application of the method-Pertinoid cavity. In addition, in order to obtain laser output with extremely narrow linewidth, low noise, high beam quality, and high stability, it is usually necessary to superimpose the use of several frequency selection methods, such as the combination of multi-fast etalon, short cavity and compound cavity in the resonator , memory compound cavity and birefringence filter combination schemes, etc., to achieve the purpose of strengthening the mode selection of the resonant cavity

This inevitably increases the complexity of the laser, introduces losses, and reduces the efficiency and stability of the laser.

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