Enhancing type-II optical second-harmonic generation by the use of a laser beam with a rotating azimuth of polarization

Kir'yanov, A. V.; Aboites, V.; Mel'nikov, I. V.
February 2001
Applied Physics Letters;2/12/2001, Vol. 78 Issue 7, p874
Academic Journal
We propose a frequency converter which exploits laser pulses with changing state of polarization. The use of such pulses as a pump source for an extracavity doubling crystal is shown to result in the large conversion efficiency. These pulses can also provide a fairly good tool of monitoring the shape of the harmonic pulse. It is shown that temporal variations of the polarization direction experienced by the pump pulse in this system may cause considerable shortening of the harmonic pulse. © 2001 American Institute of Physics.


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