Wideband optical parametric chirped pulse amplification laser system with stable carrier envelope phase

Abstract

The invention relates to a wideband optical parametric chirped pulse amplification (OPCPA) laser system with a stable carrier envelope phase. The laser system comprises a femtosecond laser device with an output wavelength of 1550nm, a spectroscope, a signal light generator, a stretcher, an angular disperser, a photonic crystal fiber frequency converter, a regenerative amplifier, multi-level Nd: yttrium aluminum garnet (YAG) amplifier, a reflection mirror, an optical parametric amplifier and a compressor. The wideband optical parametric chirped pulse amplification laser system is characterized in that a wideband signal light generated by difference frequency action has a high circular error probable (CEP) stability and a tunable characteristic of the wideband; the signal light and pump light are from the same laser device; under a condition of ignoring the environment jitter influence, the high-precision time synchronization with 10-femtosecond between a signal light pulse and a pump light pulse can be ensured, and the invention has a good frequency stabilization effect; OPCPA of the wideband is realized by means of the angular disperser, and an intermediate infrared tunable laser source is obtained.

Description

technical field [0001] The invention relates to a carrier envelope phase (abbreviated as CEP) stable broadband optical parametric chirped pulse amplification (hereinafter referred to as OPCPA) laser system, which belongs to ultrashort ultra-strong femtosecond pulse laser amplification technology. Background technique [0002] The rapid development of femtosecond laser amplification technology in the past few years has provided unprecedented practical means and development opportunities for human beings to fully explore microscopic ultrafast phenomena and study strong field physics. In particular, the ultra-strong and ultra-short femtosecond laser appears, because it has ultra-high peak power and ultra-short pulse width, so it can be used in laser fast ignition, high-energy physics, high-intensity X-ray irradiation source, particle acceleration, and X-ray generation Lasers, the generation of laser high-order harmonics and the acquisition of attosecond laser pulses, and the ge...

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Problems solved by technology

As far as the seed source is concerned, the oscillator has the disadvantages of large volume, poor frequency stability, and large time jitter. Moreover, the seed source obtained by using these methods does not have the characteristics of CEP stability, so it often amplifies the laser for optical parametric chirped pulses. The stability of the system and all-optical synchronization bring great harm, which in turn limits the applicable range of the OPCPA amplification system

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