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Laser capable of adjusting polarization degree

A laser and deflection adjustment technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problem of non-adjustable polarization degree of output light

Inactive Publication Date: 2008-08-20
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This ring laser structure has been widely used, but the polarization degree of its output light is not adjustable

Method used

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  • Laser capable of adjusting polarization degree
  • Laser capable of adjusting polarization degree
  • Laser capable of adjusting polarization degree

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Embodiment Construction

[0028] A preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0029] Referring to Fig. 2, the SOA module (SOA1550MRI-XI1500) of OptoSpeed ​​Company is selected as the semiconductor optical amplifier (2) for this adjustable polarization laser, and its rated operating current is 500mA. The semiconductor optical amplifier drive power supply (1) designed and prepared by Shanghai Guanwei Optoelectronics Co., Ltd. is used, and its output current can be adjusted within the range of 0-550mA. Adopt the model of U.S. General Photonics company to be the fiber squeezer of PLC-001 as polarization controller (3), the polarization beam splitter of model is PBS-001-P-03-SM-FC / PC as polarization beam combiner ( 5). The broadband coupler (4) is a 2×2 coupler from Shanghai Kangkuo Company, and the light splitting ratio is 50:50. The optical fiber uses G.652 standard single-mode optical fiber. Connect these devices accordin...

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Abstract

The present invention relates to a laser capable of adjusting degree of polarization, which comprises of a semiconductor light amplifier connected drive power supply and a coupler, which are connected in serial with polarization controller used single mode fiber to form a bidirectional fiber optical ring resonator, the coupler is 2*2 broadband coupler whose two output interface are connected with two input port of a polarization beam combiner by optical fiber, polarization beam combiner outputs laser. The degree of polarization of laser can be remained above value of 0-100% to output common polarized laser or depolarization laser with low degree of polarization. The laser of present invention has simple structure, low cost, can resolve problems that the optical sensing, measuring and communication system depend on polarization.

Description

Technical field: [0001] The invention relates to a laser with adjustable polarization degree, which is a light source with adjustable polarization degree suitable for optical communication and optical sensing technology. Background technique: [0002] The polarization dependence of light sensing, measurement, and communication systems has become a serious problem. To eliminate the dependence on polarization, passive depolarizers are widely used to convert polarized light sources into low-polarized depolarized light sources. The use of depolarized light sources can eliminate measurement inaccuracies caused by the polarization sensitivity of the instrument during the test. The use of a depolarized light source with a low degree of polarization and a stable degree of polarization is a key factor for Raman amplifiers and fiber optic sensors. For example, reducing and stabilizing the degree of polarization of the light emitted by the light source is beneficial to reduce gyro noi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/00H01S3/083H01S3/10H01S3/09
Inventor 王陆唐黄肇明方捻
Owner SHANGHAI UNIV
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