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.
Original language | English |
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Pages (from-to) | 791-799 |
Number of pages | 9 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 40 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2004 |
Keywords
- Nonlinear optics
- Optical parametric amplification
- Optical parametric generation
- Optical parametric oscillation
- Periodically poled lithium niobate (PPLN)
- Quasi-phase-matching (QPM)