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Optical parameter chatter pulses amplification laser system

A technology of chirped pulses and optical parameters, applied in the field of lasers, can solve the problems of complex alignment and time synchronization adjustment of signal light and pump light, narrowing of spectral gain, and degradation of beam quality of laser systems, etc., to achieve alignment and Simultaneously adjust the effect of simplicity

Inactive Publication Date: 2003-07-23
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the CPA ultra-intense and ultra-short laser system still has some insurmountable shortcomings: the output pulse signal-to-noise ratio of the laser system is low, and there is pre-pulse amplification; there is a serious spectral gain narrowing effect in the amplification process; in addition, the thermal effect in the amplifying medium makes Deterioration of the beam quality of the laser system, etc.
In addition, the pump light of the laser system needs nearly 20 minutes to work each time, so that the alignment of the signal light and pump light in the OPA amplification system can only use an external frequency-doubled Nd:YAG light source, resulting in the signal light in the OPA amplifier and the alignment of the pump light. The alignment of the pump light and the adjustment of time synchronization are extremely complicated and reduce the accuracy and reliability

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  • Optical parameter chatter pulses amplification laser system
  • Optical parameter chatter pulses amplification laser system
  • Optical parameter chatter pulses amplification laser system

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Embodiment Construction

[0025] see first figure 2 , figure 2 It is a block diagram of a specific embodiment of the optical parametric chirped pulse amplification laser system of the present invention. It can be seen from the figure that the optical parametric chirped pulse amplification laser system of the present invention consists of a femtosecond laser oscillator 1, a beam splitter 2, a grating-to-pulse stretcher 3, The first-stage OPA amplifier 4, the post-stage OPA amplifier 5, the preamplifier 6 of the pumping source system, the frequency doubling crystal 7, the dichroic beam splitter 8, the main amplification chain 9 of the pumping source system, the frequency doubling crystal 10, A dichroic reflector 11 and a grating constitute a pulse compressor 12, and the working process of the OPCPA laser system is as follows:

[0026] The Ti:Sapphire femtosecond laser oscillator 1 generates a 1064nm mode-locked pulse train of about 100 femtoseconds, which is divided into two beams by the beam splitter...

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Abstract

The system is composed of the laser oscillator in femtosecond level, the pulse stretcher of grating pair, the pulse shortener of grating pair, the beam splitter, the first stage OPA amplifier, the back stage OPA amplifier, the prime amplifier of pump source system, the first double frequency crystal, the dichroism spectroscopic plate etc. the characters of the invention are that the signal light and the pump light source are come from the same laser oscillator. The accurate time synchronization between the signal light pulse and the pump light pulse can be realized and the time jitted is reduced without need of the additional collimation light source. That is to say the signal light of each optical parameter amplification stage and the pump light can be collimated and synchronous adjusted.

Description

Technical field: [0001] The invention relates to a laser, in particular to an optical parameter chirped pulse amplifying laser system, which aims to generate super-intensive and ultra-short laser pulses with high signal-to-noise ratio. Background technique: [0002] In the past ten years, Chirped Pulse Amplification (CPA) technology has been widely used to build multi-terawatt (ie, 10 12 W, abbreviated as TW) class laser system. However, the CPA ultra-intense and ultra-short laser system still has some insurmountable shortcomings: the output pulse signal-to-noise ratio of the laser system is low, and there is pre-pulse amplification; there is a serious spectral gain narrowing effect in the amplification process; in addition, the thermal effect in the amplifying medium makes Deterioration of the beam quality of the laser system, etc. [0003] In recent years, a new principle of optical parametric chirped pulse amplification (OPCPA) based on the combination of chirped pulse ...

Claims

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Application Information

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IPC IPC(8): G02F1/39H01S3/00H01S3/109
Inventor 徐至展杨晓东林礼煌陆海鹤冷雨欣张正泉李儒新张文琦
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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