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Q: Quantenoptik
Q 15: Nichtlineare Optik II
Q 15.5: Talk
Tuesday, April 4, 2000, 17:30–17:45, HS X
Stabilization of intra-cavity frequency doubled solid state lasers with phase matching type I or II — •Dehua Li1, Changhong Zhu1, Volker Gaebler1, Baining Liu1, H. J. Eichler1, Zhiguo Zhang2, Ying Wang3, Zhenjia Li3, and Junlin Qiu3 — 1Optisches Institut, TU Berlin, Str. d. 17. Juni 135, 10623 Berlin — 2Institute of Physics, Chinese Academy of Sciences, Beijing, China — 3Laser Institute, Huazhong University of Science, Wuhan, China
Second harmonic generation is a widely used nonlinear optical frequency conversion technique to generate coherent radiation in visible and UV spectral region. However, the development of cw intracavity SHG lasers under multilongitudinal modes operation has been seriously limited by the Green Problem. Baer et al. pointed out that the output instabilities arise from the coupling of the longitudinal modes in the laser oscillator by sum frequency generation. An extended physical model on intracavity binary wave plates based on the Jones matrix formalism that gives the prerequisite for independently intracavity frequency doubling under cw multi-longitudinal mode operation has been obtained. The formulas for eliminating the noise of the frequency doubled output in phase matching type I and II conditions will be presented. A general condition concerning the round-trip Jones matrix has been achieved. Components mij (i,j=1,2) of the matrix that satisfy the following relationships: m11 = m22 or m12 = m21 = 0 , for phase matching type II or I respectively, can eliminate the influence of SFG.