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Method and laser source for generation of optically synchronized dual-wavelength ultrashort light pulses
Method and laser source for generation of optically synchronized dual-wavelength ultrashort light pulses
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机译:产生光学同步双波长超短光脉冲的方法和激光源
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摘要
This invention relates to the laser field, particularly to laser methods and sources for generation of two optically synchronized ultrashort light pulses differing in central wavelengths and spectral widths. A method comprises generation of initial laser radiation which has a central wavelength » 0 and a spectral width » 0 . Further, the initial radiation is pre-amplified and spectrally broadened up to a spectral width ». Finally, two output pulses are formed from the spectrally broadened radiation by extracting a first and a second portions of a spectrum with central wavelengths » 1 , » 2 and widths » 1 , » 2 , respectively. In order to implement a compact and reliable laser source based mainly on fiber-optical components, values of the central wavelengths » 0 , » 1 , » 2 and the spectral widths » 0 , », » 1 , » 2 , are predetermined as proposed by this invention. The laser source is suitable as a primary source for OPA and OPCPA systems. The laser may comprise a master generator (4) and a pump pulse amplifier (5) which is a chirped pulse amplifier. The master generator emits two synchronized ultrashort pulses (6,7). The one pulse (6) is characterized by a wavelength corresponding to the peak wavelength of an Yb-doped active medium. The other pulse (7) is characterized by a wavelength corresponding to the peak wavelength of a Nd-doped active medium.The master generator may comprise a mode-locked fiber oscillator (8) and ^Yb-doped fiber amplifiers (9) and a nonlinear spectral broadening element (10) and a spectral filtering element (11). The pump pulse amplifier may comprise a pulse stretcher (13), an amplifier (14) and a pulse compressor (15). The two amplified and synchronized pulses may be used for an OPCPA.
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