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

A distributed feedback, semiconductor technology, applied in the direction of semiconductor lasers, lasers, laser components, etc., can solve the problems that semiconductor lasers cannot effectively apply interferometric systems, affect system performance, laser modulation rate, semiconductor laser beam divergence, etc., to achieve gain enhancement , Improve the side mode suppression ratio and narrow the line width of the light source

Active Publication Date: 2012-10-03
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] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to specific embodiments and drawings.

[0026] Such as figure 1 As shown, figure 1 It is a distributed feedback external cavity narrow linewidth semiconductor laser for realizing frequency self-locking provided by the present invention, including:

[0027] A single-ended output semiconductor laser a, the left end surface is coated with a reflective film, and the right end light outlet is coated with an anti-reflection coating; this way, on the one hand, the laser generated by the laser can be output as much as possible, and on the other hand, the light feedback from the right end can be as much as possible Enter the active area of ​​the semiconductor laser;

[0028] A collimating lens b, which makes the light emitted from the semiconductor laser a pass through the following optical elements in para...

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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 that realizes frequency self-locking. Background technique [0002] Since the birth of semiconductor lasers, with the application of laser technology, single-longitudinal-mode semiconductor lasers have been used in optical communication systems, biomedicine, coherent detection, water quality detection and other fields. There are strict requirements for line width, and narrow line width semiconductor lasers have become key devices in many applications. [0003] For example, in optical communications, the International Electrotechnical Union (ITU) proposed a 32-channel WDM wavelength positioning standard proposal: f=193.1±0.1×N (THz), and 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 Applications(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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