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Tunable laser

A technology for tuning lasers and electro-optic deflectors, applied in the laser field, can solve the problems of high cost of acousto-optic crystals, and achieve the effect of simple structure, low cost and fast tuning speed

Inactive Publication Date: 2014-12-03
SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

But the cost of acousto-optic crystal is relatively high

Method used

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0022] The invention uses the electro-optical deflector combined with the blazed grating to realize the wavelength tuning of the single-frequency laser, that is, the refractive index of the electro-optical crystal is changed by controlling the voltage change, thereby changing the incident angle of the resonant light incident on the grating to realize the frequency selection, so as to make Tunable laser for fast scanning. Specifically, the tunable laser includes a resonant cavity and a gain medium. The resonant cavity includes a gain medium, a collimator, an electro-optical deflector and a grating arranged according to the optical path; the electro-optical deflector adjusts the angle at which the resonant light is incident on the grating to achieve frequency selection . The pump light can be incident into the gain medium by end pumping or side pumping. The st...

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Abstract

The invention relates to the technical field of laser, and discloses a tunable laser. The tunable laser comprises a resonant cavity and a gain medium, wherein the resonant cavity internally comprises the components of: the gain medium, a collimator, an electro-optical deflector and a raster; wherein the gain medium, the collimator, the electro-optical deflector and the raster are arranged in an optical path. The electro-optical deflector turns resonant light to an angle of entering the raster, thereby realizing frequency selection. The tunable laser utilizes the electro-optical deflector and a shining raster for realizing wavelength tuning of a single-frequency laser, and has advantages of: simple and feasible structure, high reliability, low cost, high tuning speed, wide tuning range, etc.

Description

Technical field [0001] The present invention relates to the field of laser technology, in particular to a tunable laser. Background technique [0002] Using the acousto-optic and nonlinear effects of crystals, various effective devices have been made, including optical modulators, optical deflectors, etc. These devices have played a very important role in the development of optical communications and laser technology. At present, the acousto-optic deflector made by using the acousto-optic effect is very versatile, and has been applied to the scanning of laser radar, the scanning of TVs and large-screen displays, and optical communications. Its advantages are simple structure, large deflection angle (1o-4.5o), fast deflection speed, and large extinction ratio. However, the cost of acousto-optic crystals is relatively high. Summary of the invention [0003] The purpose of the present invention is to provide a tunable laser, which uses an electro-optical deflector combined with a b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H01S3/107
Inventor 吴砺贺坤张猛孙正国
Owner SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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