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Temperature-and-wavelength-insensitive optical parametric chirped-pulse amplifier

A chirped pulse and amplifier technology, applied in the field of chirped pulse amplifiers, can solve problems such as a blank space, and achieve the effect of eliminating group velocity mismatch

Active Publication Date: 2017-02-15
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current technical approach to realize an OPCPA system that is not sensitive to temperature is almost blank.

Method used

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  • Temperature-and-wavelength-insensitive optical parametric chirped-pulse amplifier

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0042] figure 1It is a schematic diagram and effect diagram of a traditional amplifier and the temperature and wavelength insensitive optical parametric chirped pulse amplifier of the present invention. In traditional amplifiers, signal light and pump light are incident into the amplifier at a certain non-collinear angle. Because the non-collinear angle has the ability to adjust the phase matching, the amplifier is insensitive to wavelength. But in traditional amplifiers, due to the lack of additional degrees of freedom, once the ambient temperature deviates from the set operating temperature, the gain and conversion efficiency will drop rapidly. On the contrary, in the present invention, since the direction of the reflector in the pumping light path is adjusted, the non-collinear angle between the pumping light and the signal light is set in a range grea...

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Abstract

The invention provides a temperature-and-wavelength-insensitive optical parametric chirped-pulse amplifier, which is formed by a pump light path, a signal light path and an amplifier. The pump light path comprises a neodymium-doped yttrium vanadate regenerative amplifier, a neodymium-doped yttrium aluminium garnet amplifier, a first image transfer system and a frequency doubling crystal. The signal light path comprises a titanium-sapphire regenerative amplifier, a pulse stretcher and a pulse compressor. The amplifier is a nonlinear crystal amplifier. The temperature-and-wavelength-insensitive optical parametric chirped-pulse amplifier is characterized in that a chirp signal light beam and a pump light beam are input to the nonlinear crystal amplifier at a non-colinear angle larger than 5 DEG C; and through optimization of groove number of a first grating, the signal light beam is modified by angular dispersion. The temperature-and-wavelength-insensitive optical parametric chirped-pulse amplifier has the advantages of being insensitive to both temperature and wavelength, and meanwhile, paves the way for synchronously improving the peak power and mean power of an ultra-short ultra-intense laser system.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to an optical parameter chirped pulse amplifier which is insensitive to temperature and wavelength. Background technique [0002] Optical parametric chirped-pulse amplification (hereinafter referred to as OPCPA) is an effective technique for generating ultrashort and ultraintense laser pulses. In OPCPA, the ultrashort pulse is first stretched to a chirped pulse with a long pulse width, then the chirped pulse is amplified by the pump light in the amplifier, and finally compressed back to the original width by a compressor to obtain a strong ultrashort pulse. short pulse. Due to its huge gain bandwidth, OPCPA can already achieve petawatt-level peak power output and tens of millijoules of cycle-level pulses. However, due to the absorption of laser energy by the nonlinear crystal in the amplifier, the thermal effect becomes the core factor restricting the high average power OPCPA. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/10H01S3/102
CPCH01S3/06758H01S3/10023H01S3/1024H01S3/0092G02F1/3544G02F2203/60G02F1/39H01S3/0057G02F1/392
Inventor 钱列加唐道龙马金贵王静周冰洁袁鹏谢国强
Owner SHANGHAI JIAO TONG UNIV
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