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A 100-picosecond laser that suppresses thermal effects

A laser and thermal effect technology, applied in the field of lasers, can solve problems such as hot spots, achieve good stability, good dispersion effect, and simple structure

Active Publication Date: 2021-10-15
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a 100-picosecond laser that suppresses thermal effects, aiming to solve the problems of thermal effects that are easy to occur in the existing SBS pulse compression, such as thermal convection, hot spots, etc.

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  • A 100-picosecond laser that suppresses thermal effects
  • A 100-picosecond laser that suppresses thermal effects
  • A 100-picosecond laser that suppresses thermal effects

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Embodiment Construction

[0053] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0054] The invention relates to a hundred picosecond laser capable of suppressing thermal effects, which comprises a rotating wedge lens 3-5 with an adjustable inclination angle. The hundred picosecond laser can compress the nanosecond long pulse to the hundred picosecond level, and obtain the output energy of the joule level. Among them, the rotating wedge lens 3-5 can make the focus spot of the beam evenly distributed in the Brillouin generation cell 3-6 by changing the beam transmission direction, so as to avoid repeated accumulation of heat at the same position, causing serious thermal effects and other abnormal linear effect. The specific implementation mode is described in detail below:

[0055] figure 1 A schematic structural diagram of a hundred picosecond laser that ...

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Abstract

The invention discloses a hundred picosecond laser capable of suppressing thermal effects, comprising: a seed source generates single longitudinal mode linearly polarized pump light, and the divergence angle of the pump light is θ L , the pump light enters the optical isolator and is transmitted to the SBS pulse compressor, and the optical isolator is used for unidirectional transmission of light beams; the SBS pulse compressor includes: the pump light enters the Bri In the Brillouin amplification cell, the first attenuator is used to control the peak power density of the beam, the focusing lens is used to increase the power density of the pump light, and the Brillouin amplification cell is filled with SBS active medium; the output pump light passes through the second attenuator And the rotating wedge lens enters the Brillouin generation cell, and the Brillouin generation cell generates backward Stokes seed light through stimulated Brillouin scattering, and enters the Brillouin amplification cell again to interact with the forward pump light to realize the seed light compression and amplification. The laser can achieve short pulse acquisition of hundreds of picoseconds under the condition of repetition frequency ≥kHz, and output energy of Joule level.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a hundred picosecond laser capable of suppressing thermal effects. Background technique [0002] High-repetition-frequency, high-energy 100-picosecond short-pulse lasers are very important and widely used in satellite laser ranging, laser processing, and medical laser therapy. For example, in terms of satellite laser ranging, the satellite laser ranging system using a hundred picosecond lasers can achieve ultra-high-precision long-distance ranging. For example, geosynchronous orbit satellites have sub-centimeter ranging accuracy; 8.5mm. This ultra-high-precision ranging satellite can greatly improve the positioning and guidance capabilities of the navigation system. [0003] Although mode-locking technology can obtain pulses with narrow pulse width and high power, most of the pulses generated by it are multi-mode, so there is a large competitive relationship, resulting in very low output ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/08H01S3/11H01S3/30
CPCH01S3/08004H01S3/08072H01S3/11H01S3/30
Inventor 王雨雷曹晨白振旭吕志伟李凯于宇
Owner HEBEI UNIV OF TECH
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