External cavity feedback laser generation method and laser

An external cavity feedback and laser technology, applied in the laser field, can solve the problems of being very sensitive to temperature and current, inaccurate, prone to mode hopping, etc., to ensure long-term stability and accuracy, and good immunity.

Inactive Publication Date: 2011-02-09
PEKING UNIV
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  • Application Information

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Problems solved by technology

More strictly speaking, the external cavity feedback semiconductor laser realized by the existing grating external cavity and interference filter external cavity technology has no accuracy due to long-term frequency drift
[0003] In addition, the prior art has also reported the use of atomic filters to construct external cavity feedback lasers for semiconductor laser

Method used

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[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] figure 1 It is a schematic flowchart of an embodiment of an external cavity feedback laser generation method immune to temperature and current noise in the present invention. like figure 1 shown, including the following steps:

[0034] Step 101, using the narrow linewidth transmission spectrum of the Faraday anomalous dispersion atomic opti

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Abstract

The invention discloses an external cavity feedback laser generation method and a laser and belongs to the technical field of laser. The method comprises: 1) collimating the light beam output by a laser diode coated with an anti-reflection film by using a collimating lens; 2) performing frequency selection operation of the collimated light beam by using an atom filter; and 3) feeding the laser subjected to frequency selection back to the laser diode coated with the anti-reflection film by using an external cavity mirror. In the laser, the light beam output by the laser semiconductor diode coated with the anti-reflection film passes through the collimating lens, the atom filter and the external cavity mirror in turn and then return to the later semiconductor diode coated with the anti-reflection film, so that the later semiconductor diode coated with the anti-reflection film, the collimating lens, the atom filter and the external cavity mirror form a resonance light path; and a control circuit is connected with the later semiconductor diode coated with the anti-reflection film and the atom filter respectively. The method and the laser improve the long-term stability and accuracy of the laser and have high immune capacity for external environmental factors, the working temperature of the diode and the wavenoise of a working current.

Description

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Claims

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Application Information

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Owner PEKING UNIV
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