Pulsed optical parametric generation, amplification, and oscillation in monolithic periodically poled lithium niobate crystals |
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| Authors: | An-Chung Chiang Tsong-Dong Wang Yen-Yin Lin Chee-Wai Lau Yen-Hung Chen Bi-Cheng Wong Yen-Chieh Huang Jow-Tsong Shy Yu-Pin Lan Yung-Fu Chen Pei-Hsi Tsao |
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| Affiliation: | Dept. of Electr. Eng., Nat. Tsinghua Univ., Hsinchu, Taiwan; |
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| Abstract: | We conducted a series of passively Q-switched Nd:YAG laser pumped optical parametric generation, amplification, and oscillation experiments in monolithic periodically poled lithium niobate (PPLN) crystals. Double-pass optical parametric generation with an effective gain length of 10 cm in a PPLN crystal was performed in comparison with single-pass operation in the same crystal. By seeding a PPLN optical parametric amplifier with a distributed feedback (DFB) diode laser, we produced 200-ps transform-limited laser pulses at 1549.6 nm and observed parametric gain competition at different pump levels. For optical parametric oscillations, we first demonstrated 22% power efficiency from a 2.4-cm intrinsic-cavity PPLN optical parametric oscillator pumped by a 4.2-ns, 10-kW passively Q-switched Nd:YAG laser. Preliminary studies on DFB optical parametric oscillators in PPLN are mentioned. The temporal and spectral properties of these optical parametric generators, amplifiers, and oscillators are characterized and discussed. |
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