We measured the spectrum and energy of infrared triple photons generated in a phase-matched KTiOPO4 crystal pumped by picosecond beams at 532 and 1662 nm. The experimental data are in good agreement with our model, taking into account the spectral linewidths of the incident beams as well as a parasitic Kerr effect.
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http://dx.doi.org/10.1364/OL.37.002334 | DOI Listing |
Dalton Trans
October 2023
Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Much effort has been devoted to synthesizing nonlinear optical crystals with efficient second harmonic responses. Herein, a tantalum phosphate crystal NaTaPO with a moderate second harmonic response was obtained using self-fluxes of NaHPO and NaHPO. NaTaPO belongs to the c space group of monoclinic systems with cell parameters of = 8.
View Article and Find Full Text PDFWe demonstrate first-order quasi-phase-matched backward second-harmonic generation (BSHG) with an efficiency of 18.7%. This represents an increase by two orders of magnitude from earlier experiments employing higher-order quasi-phase-matching.
View Article and Find Full Text PDFBirefringence phase-matched third-harmonic generation at 1594 nm is performed for the first time in a KTiOPO single crystal micrometric ridge waveguide. The energy conversion efficiency reaches 3.4% for a pump energy as low as 2 µJ over a pulse duration of 15 ps at a repetition rate of 10 Hz.
View Article and Find Full Text PDFA 10.8 µm wide ridge waveguide was fabricated by diamond-blade dicing in an ion-exchanged periodically poled Rb-doped KTiOPO sample. The waveguide was used to generate blue second harmonic light at 468.
View Article and Find Full Text PDFType II second-harmonic generation was performed in a 15.8-mm-long KTiOPO (KTP) micrometric ridge waveguide with an average transversal section of 38 μm. Theoretical predictions are compared with experiments.
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