Patent ID: 8830567

Claim:
A chirped-pulsed amplification laser device, comprising: a fiber laser driver, comprising: a seed pulsed laser configured to produce a train of input laser pulses; a pulse stretcher configured to stretch pulse durations of the train of input laser pulses to produce a train of stretched laser pulses; and an optical power amplifier configured to amplify the stretched laser pulses to produce amplified stretched laser pulses; a laser head, comprising: a chirped fiber Bragg grating compressor, comprising: a fiber terminal section configured to receive the amplified stretched laser pulses, wherein the fiber terminal section has a length shorter than 10 centimeters to minimize broadening of the amplified stretched laser pulses; a chirped fiber Bragg grating section connected to the fiber terminal section and configured to compress and reflect the amplified stretched laser pulses to produce reflected laser pulses with compressed pulse durations; and a collimator housing configured to fixedly hold a collimator lens that is configured to focus the amplified stretched laser pulses at an end facet of the fiber terminal section and to direct the reflected laser pulses to transmit in free space, wherein the collimator housing is configured to hold the fiber terminal section tilted relative to an optical axis of the collimator lens; and a delivery fiber configured to guide the amplified stretched laser pulses from the laser driver to the laser head.