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ARBITRARY PULSE SHAPING WITH PICOSECOND RESOLUTION OVER MULTIPLE-NANOSECOND RECORDS
ARBITRARY PULSE SHAPING WITH PICOSECOND RESOLUTION OVER MULTIPLE-NANOSECOND RECORDS
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机译:在多个纳米记录上具有PICCONCOND分辨率的任意脉冲整形
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摘要
The present invention extends the resolution capability for shaping optical pulses on laser systems from the current state of the art resolution of ~250 ps to ~1 ps by utilizing a hybrid of EOM and spectral shaping technologies. In one embodiment, a short pulse derived from a mode-locked laser oscillator is dispersed using a dispersive stretcher to about 250 ps, providing a linear mapping of spectrum to time. A typical spectral shaper is used to directly write the desired temporal pattern in the spectral domain to produce a crudely patterned waveform that may also suffer from chirp. The chirp is removed by a process known as difference frequency generation by mixing it with a pulse derived from an equally chirped frequency-doubled pump in an optical parametric amplifier. The pattern is then focused in time, which is accomplished in one embodiment by propagating the pattern through a dispersive element.
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