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Apparatus for improving laser signal-noise ratio

A signal-to-noise ratio, laser technology, applied in the laser field, can solve the problems of high cost, large loss, complex structure, etc., and achieve the effect of reducing loss, improving pulse signal-to-noise ratio, and compact structure

Active Publication Date: 2008-12-17
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

These methods all require body materials to be built, with large loss, complex structure and high cost.

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  • Apparatus for improving laser signal-noise ratio

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0019] see first figure 1 , figure 1 It is a schematic diagram of the overall structure of the device for improving the laser signal-to-noise ratio in the present invention. It can be seen from the figure that the device for improving the laser signal-to-noise ratio in the present invention is composed of: the incident beam B passes through the first polarization controller 1, the polarizer 2, and the beam splitter 3 with 1×2 ports in sequence, and the incident beam B passes through 1 The beam splitter 3 with 2 ports splits into two beams, one beam B 1 As a monitor, another beam of B 2 After passing through the nonlinear birefringent medium 4, the second polarization controller 5 is output by the analyzer 6.

[0020] The nonlinear birefringence medium corresponds to the...

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Abstract

The utility model provides a device for improving the Signal-to-Noise Ratio of laser. The device for device for improving the Signal-to-Noise Ratio of laser consists of a first polarization controller, a polarizer, and a beam splitter with 1*2 ports, which are fixed in turn in the direction of travel of the beam of light. After the incident beam passes through the beam splitter with the 1*2 ports, the incident beam is split into two beams. One of the beams is used for monitoring, and the other beam is outputted after passing through a non-linear birefringent medium, a second polarization controller and a polarization analyzer. The device for improving the Signal-to-Noise Ratio of laser has the characteristics of easy adjustment, compact structure, the Signal-to-Noise Ratio improved by 10<4>, and full utilization of optical fiber.

Description

technical field [0001] The invention relates to laser, especially a device for improving laser signal-to-noise ratio, which has the advantages of simple adjustment, compact structure, high efficiency, pulse signal-to-noise ratio can be increased by more than 104, and full-fiber can be realized. Background technique [0002] The laser signal-to-noise ratio is an important parameter of a high-power laser system, which has a great influence on the reliability and accuracy of the entire system. In high-intensity laser operation and amplification, there are many factors that will introduce laser noise pulses. For example, the limited extinction ratio in the process of selecting a single pulse will lead to small pulse residues in the pulse sequence, and the spontaneous radiation amplification generated during the laser amplification process will cause Introduce continuous background noise. [0003] The methods proposed so far to improve pulse signal-to-noise ratio mainly include ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35G02B5/30
Inventor 任小超范薇张攀政
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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