Atomic optical feedback frequency stabilized semiconductor laser

Abstract

An atom optical feedback constant frequency semiconductor laser, this laser consists of semiconductor laser groupware, collimation groupware, frequency reference source, and output coupler, adopt atom Faraday effector as frequency reference source, make the laser get high frequency stability, also make into optical feedback form with brief structure. Meanwhile atom Faraday effector has feature of multi transmission peak, and its reference frequency can be adjusted through changing magnetic field and temperature, so can adjust the output frequency of frequency stabilizer within certain range.

Description

Technical field: [0001] The invention relates to a frequency-stabilized semiconductor laser, in particular to an optical feedback-stabilized semiconductor laser with atoms as a frequency reference. Background technique: [0002] Semiconductor lasers are the most commonly used lasers due to their small size, light weight, and low power consumption. However, when semiconductor lasers are running freely, their output frequency (or wavelength) is easily affected by many factors such as excitation current and ambient temperature. Therefore, In the technical fields such as optical communication, optical remote sensing, and optical detection that require high frequency stability of lasers, when using semiconductor lasers, technical measures must be taken to stabilize their output frequency. At present, the commonly used semiconductor laser frequency stabilization measures are to compare or identify the output frequency of the semiconductor laser with the frequency reference, and th...

AI Technical Summary

Problems solved by technology

However, in the existing frequency stabilization technology of semiconductor lasers, those using highly stable atomic and molecular transition lines as the frequency reference all adopt the electronic feedback method, which not only has a complicated structure, but also the frequency cannot be adjusted.

The optical feedback method with simple structure uses F-P etalon or grating as the frequency reference source. This optical feedback frequency stabilized laser is composed of semiconductor laser components, collimation components, frequency reference source and output coupler. The frequency reference is F-P etalon or grating, so it is easily affected by vibration, temperature, air pressure and other factors, making the frequency stabilization accuracy low

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