ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Pulse narrowing characteristics in traveling-wave optical parametric generation in KTiOPO4 crystals are investigated. By utilizing the pulse narrowing effect, output pulses with pulse duration of 250 fs can be obtained from 550 fs pump pulses in the experiment. It is also demonstrated that when the conversion efficiency becomes large by increasing the pump intensity or by changing the phase-matching angle, the pulse narrowing effect becomes small. These tendencies are confirmed by numerical calculations of the parametric propagation process, which include the effects of temporal pulse shape, group-velocity difference, transverse beam profile, walk-off, two-photon absorption, and depletion. The theoretical results indicate that when the conversion efficiency becomes greater than 1%, the back-conversion process becomes large at the high-intensity part of the signal and idler pulses. This causes the pulse width to increase and reduces the pulse narrowing effect. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.363174
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