Faraday laser with locked resonant cavity membrane and preparation method thereof

Abstract

The invention discloses a Faraday laser with a locked resonant cavity membrane and a preparation method thereof. The method comprises the steps of carrying out detection on the outgoing power of the laser, and obtaining the corresponding relation between the resonant cavity membrane and the center of a gain spectral line through judgment; locking the cavity membrane and the center of the gain spectral line by adopting a modulation and demodulation technology so as to achieve accurate correspondence of the laser frequency and an atomic spectral line, thereby further improving the power and frequency stability of the Faraday laser. The Faraday laser comprises a laser diode, a collimating lens, a first Glan-Taylor prism, an atomic gas chamber, a second Glan-Taylor prism, piezoelectric ceramic, an endoscope, a beam splitter prism, a photoelectric detector, a signal generator, a frequency mixer and a servo feedback circuit, wherein the second Glan-Taylor prism is completely orthogonal to the first Glan-Taylor prism; the reflected light beam is used for locking the resonant cavity membrane; and the Faraday laser with the locked resonant cavity membrane is obtained.

Description

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

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

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