Laser beam characteristics using dc-induced second harmonic generation
1976; Optica Publishing Group; Volume: 15; Issue: 10 Linguagem: Inglês
10.1364/ao.15.002381
ISSN0003-6935
Autores Tópico(s)Advanced Fiber Laser Technologies
ResumoPrevious measurements of electric field induced second harmonic generation indicated that the confocal parameter for a laser beam as calculated from the second harmonic intensity profile was in disagreement with that calculated from the measured beam diameter. In this paper, we show that this discrepancy is caused by the departure of the beam from the pure TEM00 mode. We expand a distorted beam in terms of the component modes by using the experimental beamscan and calculate the second harmonic profile using this expansion. This calculational procedure is found to be consistent with experimental observations.
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