Wide spectral bandwidth ultrashort laser pulse seed source with stable carrier-envelope phase

A carrier envelope phase, ultra-short laser technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of non-continuous spectrum and spectrum fragmentation, and achieve wide spectral bandwidth and good coherent beam combining effect , The effect of eliminating the influence of jitter

Active Publication Date: 2012-06-27
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

But when the two bands of light do not overlap, the coherently synthesized spectrum appears "broken"
Shu-Wei Huang et al. used waveform synthesis technology based on coherent wavelength division multiplexing to synthesize the light in the band with a center wavelength of 0.87um and the band with a center wavelength of 2.15um output by the Optical Parametric Chirped Pulse Amplification (OPCPA) process. The spectrum spans 1.8 octaves, and a subperiod non-sinusoidal waveform that can drive strong-field laser physics experiments is obtained (see "High-energy pulse synthesis with sub-cyclewaveform control for strong-field physics", Nature Photonics, Vol .5, Page 475-479, August 2011), because the two bands are not superimposed, the obtained spectrum is not continuous, which brings challenges to obtain periodic or even sub-periodic laser pulses

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  • Wide spectral bandwidth ultrashort laser pulse seed source with stable carrier-envelope phase
  • Wide spectral bandwidth ultrashort laser pulse seed source with stable carrier-envelope phase
  • Wide spectral bandwidth ultrashort laser pulse seed source with stable carrier-envelope phase

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Embodiment Construction

[0021] The device will be further described below in conjunction with the embodiments and accompanying drawings, but this should not limit the protection scope of the present invention.

[0022] Please refer to figure 1 , figure 1It is a schematic structural diagram of an embodiment of a wide spectral bandwidth infrared femtosecond laser pulse seed source with a stable carrier envelope phase in the present invention. It can be seen from the figure that the embodiment of the wide spectral bandwidth ultrashort laser pulse seed source with stable carrier envelope phase of the present invention includes a pumping source 1, and the first beam splitting is in sequence on the pumping optical path output by the pumping source 1 Sheet 2, first lens 3, white gemstone 4, second lens 5, second beam splitter 6 and first mirror 7, the reflected beam direction of the first beam splitter 2 is the third beam splitter in sequence sheet 8 and the second reflector 9; at the intersection of the ...

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Abstract

The invention relates to a wide spectral bandwidth ultrashort laser pulse seed source with a stable carrier-envelope phase (CEP). The seed source comprises a pumping source, a parametric amplification system, a spectrum widening system and a dispersion compensation system. Two difference frequency processes in parametric amplification are utilized to generate light beams with stable CEPs; a dichroic mirror is used to carry out beam combination; the combined light beam is coupled by a lens and then enters a hollow fiber to carry out spectrum widening and pulse compression; and then, a femtosecond ultrashort laser pulse output that has a stable CEP and a continuous super-wide spectral bandwidth is obtained. According to the invention, the seed source is simple and is easy to operate; a gap problem during combination of light beams with different wave bands can be solved; continuous super-wide spectral bandwidths can be obtained; and a femtosecond ultrashort laser pulse output of a monocyclic order or even a sub-cyclic order can be obtained by compression, wherein the output has a stable CEP; therefore, the seed source can be widely applied to many fields like attosecond pulse generation, pumping detection and THz generation and the like.

Description

technical field [0001] The invention relates to an ultrashort laser pulse, in particular to a carrier envelope phase (abbreviated as CEP) stable wide spectral bandwidth ultrashort laser pulse seed source. The device uses a hollow fiber to output CEPs of different bands from two parameter amplification processes. The stable beam undergoes spectral broadening at the same time to obtain continuous ultra-wide spectral bandwidth, and obtains single-period or even sub-period femtosecond ultrashort laser pulses after compression. Background technique [0002] For cycle-scale laser pulses, the maximum value of the electric field intensity will change significantly in half a photoperiod, and the deviation between the peak value of the pulse electric field and the peak value of the pulse envelope is called the carrier envelope phase (CEP). Under different carrier phases, the oscillations of laser pulses with the same envelope are also very different, and their interactions with matter...

Claims

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Application Information

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IPC IPC(8): H01S3/11H01S3/13
Inventor 李妍妍黄延穂王丁许毅陆效明王建州冷雨欣
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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