Generation of 6.6-µm Optical Parametric Oscillation with Periodically Poled LiNbO_3 (original) (raw)
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Quasi-phase-matched optical parametric oscillators in bulk periodically poled LiNbO_3
Journal of the Optical Society of America B, 1995
We review progress in quasi-phase-matched optical parametric oscillators in bulk periodically poled LiNbO 3. Using the electric-field poling process, we can reliably fabricate 0.5-mm-thick crystals with uniform domain structures over a 15-mm length. Periodically poled material retains the low-loss and bulk power handling properties of single-domain LiNbO 3 , and quasi phase matching permits noncritical phase matching with d 33 , the highest-valued nonlinear coefficient. Optical parametric oscillators pumped by 1.064-mm pulsed Nd:YAG lasers have been operated over the wavelength range 1.4-4 mm with tuning by temperature or by quasi-phasematched period. We have shown an oscillation threshold as low as 0.012 mJ with a Q-switched pump laser and pumping at greater than ten times threshold without damage. We have also demonstrated a cw doubly resonant oscillator near 1.96 mm pumped directly with a commercial cw diode laser at 978 nm.
IEEE Journal of Quantum Electronics, 2004
We conducted a series of passively-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-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.
Applied Physics Letters, 2001
We present experimental evidence of continuous-wave self-pumped parametric oscillation in Yb 3ϩ -doped periodically poled lithium niobate co-doped with MgO. A single bulk crystal of periodically poled lithium niobate containing Yb 3ϩ laser-active ions performs as a singly resonant parametric oscillator generating a signal wave at 1360 nm. The optical parametric oscillator is intracavity pumped by the laser emission at 1063 nm produced by the Yb 3ϩ ions in the crystal. The whole system is end pumped at 980 nm.
Fabrication of periodically poled lithium niobate chips for optical parametric oscillators
Pramana, 2010
An electric-field poling process was established that yielded uniform periodically poled lithium niobate (PPLN) in 0.5 mm thick lithium niobate substrate. We have fabricated 50 mm long fanned as well as multigrating PPLNs having period variations from 25 µm to 32 µm. These PPLNs are required for quasi-phase-matched (QPM) optical parametric oscillator (OPO) applications. We have also configured a bench-top OPO set-up based on these PPLNs.
Diode-pumped optical parametric oscillator
Optics Letters, 1996
Diode-pumped optical parametric oscillation has been demonstrated for the first time to our knowledge in a single Nd:MgO:LiNbO 3 nonlinear crystal. The crystal is pumped by a semiconductor diode laser array at 812 nm. The Nd 31 ions absorb the 812-nm radiation to generate 1084-nm laser oscillation. On internal Q switching the 1084-nm radiation pumps the LiNbO 3 host crystal that is angle cut at 46.5 ± and generates optical parametric oscillation. The oscillation threshold that is due to the 1084-nm laser pump with a pulse length of 80 ns in a 1-mm-diameter beam was measured to be ഠ1 mJ and produced 0.5-mJ output at 3400-nm signal wavelength.
Pulsed nanosecond optical parametric generator based on periodically poled lithium niobate
Optics Communications, 2003
In this paper we report on a pulsed nanosecond optical parametric generator (OPG) of congruent periodically poled lithium niobate (PPLN). The OPG is excited by TEM 00 single frequency pulses (duration: 10 ns, repetition rate: 10 kHz) of a Q-switched Nd:YVO 4 laser system. With 7.2 W of average power the OPG generated 1.6 W of signal and 0.76 W of idler radiation. The signal and idler waves are tunable in the range of 1.56-1.64 and 3.34-3.03 lm, respectively, by changing the temperature of the PPLN crystal. Injection seeding with 3 mW of cw 1.580 lm light of a tunable DFB diode laser narrowed the spectral width of the OPG signal wave to less than 140 MHz.
Diode-Laser-Pumped Optical Parametric Oscillator
1996
This report describes the first operation of a CW directly diode-pumped optical parametric oscillator using periodically poled lithium niobate as a nonlinear medium. Degenerate oscillation of a doubly resonant device was sucessful. This device shows potential as a CW source in the near infrared region from 1.3-5 microns.
Applied Optics, 1999
We report on a rugged all-solid-state laser source of near-IR radiation in the range of 1461-1601 nm based on a high-power Nd:YVO 4 laser that is mode locked by a semiconductor saturable Bragg reflector as the pump source of a synchronously pumped optical parametric oscillator with a periodically poled lithium niobate crystal. The system produces 34-ps pulses with a high repetition rate of 235 MHz and an average output power of 1 W. The relatively long pulses lead to wide cavity detuning tolerances. The comparatively narrow spectral bandwidth of Ͻ15 GHz is suitable for applications such as pollutant detection.