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Time-domain doublet pulse pumping method for restraining parasitic oscillation of Ti sapphire multipass amplifier

A multi-pass amplifier, titanium sapphire technology, applied in instruments, lasers, phonon exciters, etc., can solve the problem of easy to achieve parasitic oscillation, and achieve the effect of reducing sensitivity, suppressing parasitic oscillation, and improving amplification efficiency

Active Publication Date: 2015-02-18
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

The time-domain distribution of the pump light currently used is a single-peak pulse distribution, so the number of inversion particles in the Ti:sapphire crystal is very sensitive to time. In the time interval between each pass of the multi-pass amplifier, the Ti The inversion population within the gem increases all the time with the absorption of the pump energy, and the lateral gain easily reaches the threshold of parasitic oscillations

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  • Time-domain doublet pulse pumping method for restraining parasitic oscillation of Ti sapphire multipass amplifier
  • Time-domain doublet pulse pumping method for restraining parasitic oscillation of Ti sapphire multipass amplifier
  • Time-domain doublet pulse pumping method for restraining parasitic oscillation of Ti sapphire multipass amplifier

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Embodiment Construction

[0033] Please see first figure 1 , figure 1 It is the optical path diagram of the method for suppressing the parasitic oscillation of the titanium sapphire multi-pass amplifier by time-domain double-peak pulse pumping of the present invention. The present invention is a method for suppressing the parasitic oscillation of the titanium-sapphire multi-pass amplifier by time-domain double-peak pulse pumping. The titanium sapphire multipass amplifier includes: 527nm pump laser 1, titanium sapphire crystal 2, multipass amplifier 3, synchronous delay trigger 4 and 800nm ​​laser seed source 5, the method includes the following steps:

[0034] ① The synchronous delay trigger 4 triggers the 527nm pump laser 1 to generate a 527nm pump pulse with bimodal distribution in the time domain and injects and pumps the Ti:sapphire crystal 2 in the multi-pass amplifier 3;

[0035] ② The synchronous delay trigger 4 triggers the 800nm ​​seed light pulse generated by the 800nm ​​laser seed source 5 ...

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Abstract

Disclosed is a time-domain doublet pulse pumping method for restraining parasitic oscillation of a Ti sapphire multipass amplifier. The properties of time-domain doublet pumping pulse are utilized, time delay of seed light is adjusted and single-pass time interval of the multipass amplifier is adjusted to amplify 800-nanometer seed light to enable crosswise transmission gain of a Ti sapphire crystal to be kept in a low level in the process of amplifying, the parasitic oscillation of the Ti sapphire is effectively restrained, and amplifying efficiency of the seed light is improved. The time-domain doublet pulse pumping method for restraining the parasitic oscillation of the Ti sapphire multipass amplifier has the advantages of being convenient to adjust, simple, high-efficient and strong in practicality.

Description

technical field [0001] The invention relates to laser amplification technology, in particular to a method for suppressing parasitic oscillation of a titanium sapphire multi-pass amplifier by time-domain bimodal pulse pumping. Background technique [0002] The invention of chirped pulse amplification (CPA) technology has opened up a new path for ultrashort and ultra-intense lasers; since the 1990s, CPA technology has developed rapidly. : Sapphire)'s petawatt (PW) level laser device; in the PW laser device based on Ti:Sapphire, in order to obtain high-energy amplified output, the lateral size of Ti:Sapphire is much larger than the vertical size. Therefore, under high-energy pumping, The horizontal gain of titanium sapphire is much greater than the vertical gain. When there is no seed light injection, the periphery of Ti:sapphire is a resonant cavity. When the lateral gain reaches a certain threshold, strong lateral parasitic oscillations will occur, consuming a large number o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/16H01S3/094H01S3/10G02F1/39
Inventor 储玉喜梁晓燕於亮红李儒新徐至展
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI