Observation of nonlinear optical phenomena in air and fused silica using a 100 GW, 1.54 μm source
M. L. NaudeauSandia National Labs, PO Box 5800, MS1153, Albuquerque, New Mexico 87185-1153 USAR. J. LawSandia National Labs, PO Box 5800, MS1153, Albuquerque, New Mexico 87185-1153 USATing S. LukSandia National Labs, PO Box 5800, MS1153, Albuquerque, New Mexico 87185-1153 USAThomas R. NelsonSandia National Labs, PO Box 5800, MS1153, Albuquerque, New Mexico 87185-1153 USAStewart CameronSandia National Labs, PO Box 5800, MS1153, Albuquerque, New Mexico 87185-1153 USAJ. V. RuddPresent address: Lockheed Martin Coherent Technologies, 135 S. Taylor Ave, Louisville, CO 80027 USA
2006en
ABI
Аннотация
A 100-GW optical parametric chirped-pulse amplifier system is used to study nonlinear effects in the 1.54 mum regime. When focusing this beam in air, strong third-harmonic generation (THG) is observed, and both the spectra and efficiency are measured. Broadening is observed on only the blue side of the third-harmonic signal and an energy conversion efficiency of 0.2% is achieved. When propagated through a 10-cm block of fused silica, a collimated beam is seen to collapse and form multiple filaments. The measured spectral features span 400-2100 nm. The spectrum is dominated by previously unobserved Stokes emissions and broad emissions in the visible.
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