Distribution feedback external cavity narrow line board semi-conductor laser for achieving frequency self-locking

A distributed feedback, semiconductor technology, used in semiconductor lasers, lasers, laser parts and other directions, can solve the problems that semiconductor lasers cannot be effectively used in interferometric measurement systems, affect system performance, laser modulation rate, semiconductor laser beam divergence, etc., and achieve gain enhancement. , The effect of improving the side mode suppression ratio and narrowing the line width of the light source

Active Publication Date: 2013-12-18
山东中科际联光电集成技术研究院有限公司
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Problems solved by technology

Otherwise, the laser will appear chirping phenomenon under high-speed modulation, which will seriously affect the system performance and the improvement of laser modulation rate
[0004] In addition, when semiconductor lasers are used in interferometry and coherent detection, due to the beam divergence and poor beam coherence of the semiconductor laser itself, if it is not shaped and the line width is narrowed, the semiconductor laser will not be effectively used in the interferometry system.

Method used

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  • Distribution feedback external cavity narrow line board semi-conductor laser for achieving frequency self-locking
  • Distribution feedback external cavity narrow line board semi-conductor laser for achieving frequency self-locking

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Embodiment Construction

[0025] Such as figure 1 as shown, figure 1 It is a distributed feedback external-cavity narrow-linewidth semiconductor laser that realizes frequency self-locking provided by the present invention, including:

[0026] A single-ended output semiconductor laser a, its left end surface is coated with reflective film, and the light outlet of the right end is coated with anti-reflection film; in this way, on the one hand, the laser light generated by the laser can be output as much as possible, and on the other hand, the light fed back from the right end can be as much as possible Enter the active region of the semiconductor laser;

[0027] A collimator lens b, which enables the light emitted by the semiconductor laser a to pass through the rear optical elements in parallel to collimate the optical path. When in use, anti-reflection coatings need to be coated on both end surfaces of the collimator lens to reduce reflectivity;

[0028] Two 1 / 4 wave plates, that is, the first 1 / 4 wa...

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Abstract

The invention discloses a distribution feedback external cavity narrow line board semi-conductor laser for achieving frequency self-locking, which comprises a semi-conductor laser (a), a collimating lens (b), a polarizingprism (c), a first 1 / 4 wave plate (d), an F-P etalon (e), a second 1 / 4 wave plate (f), a front cavity reflector (g), an isolator (h), a focusing lens (f), and an optical fiber (j). The laser disclosed by the invention can effectively narrow the light width of a light source, and achieve the frequency self-locking of the external cavity semi-conductor laser.

Description

technical field [0001] The invention belongs to the technical field of optical communication devices, in particular to a distributed feedback external-cavity narrow-linewidth semiconductor laser for realizing frequency self-locking. Background technique [0002] From the date of the birth of semiconductor lasers, with the application of laser technology, single longitudinal mode semiconductor lasers are required in the fields of optical communication systems, biomedicine, coherent detection, water quality detection, etc. Linewidth has strict requirements, and narrow linewidth semiconductor lasers have become key devices in many application fields. [0003] For example, in optical communication, the International Electrotechnical Union (ITU) proposes a 32-way WDM wavelength positioning standard: f=193.1±0.1×N (THz), where N is an integer. The center frequency is 193.1THz, which corresponds to the 1550nm band, and the channel frequency interval of 0.1THz corresponds to the wa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/14H01S5/068
Inventor 刘建国刘宇黄宁博
Owner 山东中科际联光电集成技术研究院有限公司
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