Faraday Laser Locked Using Resonator Cavity Film and Its Fabrication Method

Abstract

The invention discloses a Faraday laser locked by a cavity film of a resonator and a preparation method thereof. By detecting the output power of the laser, the corresponding relationship between the cavity mode of the resonator cavity and the center of the gain spectral line is determined; The cavity mode is locked to the center of the gain spectral line, so as to achieve the precise correspondence between the laser frequency and the atomic spectral line, and further improve the power and frequency stability of the Faraday laser; including: laser diode, collimating lens, first Glan Taylor prism, Atomic gas chamber, second Glan-Taylor prism, piezoelectric ceramics, cavity mirror, beam splitter prism, photodetector, signal generator, mixer, servo feedback circuit; the second Glan-Taylor prism and the first Glan-Taylor prism Completely orthogonal; the reflected beam is used for cavity film locking; Faraday laser with cavity film locking is obtained.

Description

technical field [0001] The invention belongs to the technical field of laser frequency stabilization, and relates to a technology of locking using a resonant cavity film, in particular to a Faraday laser locked using a resonant cavity film and a preparation method thereof. The method scans out the cavity film signal of the Faraday laser. And the error signal is obtained by the modulation and demodulation method and combined with the method of feedback loop locking to realize a Faraday laser with stable power and frequency. Background technique [0002] Since the discovery of FADOF (Faraday Anomalous Dispersion Optical Filter) in 1956, it has been used as laser frequency stabilization. There are several common frequency options for building semiconductor lasers, such as gratings, Philips cavities, and interference filters. However, semiconductor lasers using these frequency-selective elements have the disadvantage of being sensitive to the current and temperature of the lase...

AI Technical Summary

Problems solved by technology

However, semiconductor lasers using these frequency-selective components have the disadvantage of being sensitive to the current and temperature of the laser tube, which causes the frequency of the laser to drift easily

The semiconductor laser built with FADOF can overcome the defect that the frequency of the laser is easy to drift, but there are also new problems. The power jitter caused by the cavity membrane jitter of the Faraday laser is larger than that of lasers using other frequency-selective components, resulting in Faraday lasers. Poor power stability will introduce noise to systems using Faraday lasers, limiting the application range of Faraday lasers

Images