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Holographic phase conjugation is used to focus light onto sub-wavelength holes in a gold film directly on top of a photorefractive lithium niobate crystal. This could lead to a high-numerical-aperture-focusing system.
The fabrication of periodic poled Lithium Tantalate single crystal fibers by the laser heated pedestal growth method were achieved with in-situ monitoring of transient poling current. The whole cross section of the fiber is poled through as seen from the confocal measurement.
We report a continuous-wave, single-longitudinal-mode, singly resonant OPO oscillating at 3.3 mum with 60% pump depletion. We observed optical bistability, thermal guiding, and clamped pump depletion for this OPO.
We report on synchronously pumped OPOs with intracavity SHG or SFG in the same MgO:PPLN crystal. At e.g. 590 nm an output power of 190 mW was obtained with 140 fs pulses at a repetition rate of 81 MHz.
We demonstrated a diode-pumped, electro-optically internal-Q-switched laser system fabricated using a Nd:MgO:PPLN. We obtained laser pulses of pulse energy > 2.45 muJ and pulse width ~28 ns from this internal-Q-switched laser system with 2% output coupling.
We show that quasi-phase-matching corresponding to a propagation in a periodically poled non linear medium at any angle with the grating vector provide wider wavelength tuneability and spectral acceptance. The case of MgO:PPLN is studied.
We describe a diode-pumped Cr3+:LiCAF laser which produces 590 mW of continuous-wave output power using two pump diodes. Passive mode locking with a semiconductor saturable absorber mirror produces 97-fs, 2.8-nJ pulses near 800 nm wavelength.
159 mW diffraction limited blue light at 488 nm could be generated in a periodically poled lithium niobate waveguide crystal by frequency doubling of a continuous wave distributed feedback laser diode.
Channel waveguide was fabricated in a KLTN crystal. The waveguide was produced by a selective implantation of He+ ions into the crystal through a gold stopping mask, which created a trough shaped cladding.
The authors report on the spectroscopy and laser results of diode pumped Pr-doped fluorides. We obtained efficient laser emission in the visible range with LiYF4, LiLuF4 and LiGdF4 crystals.
We present a cryogenically-cooled Yb:LiYF4 chirped-pulse amplification system with an energy of Gt100-mJ boosted by regenerative and multi-pass amplifiers for pumping multi-terawatt, few-cycle optical parametric chirped-pulse amplification.
We studied blue light-induced near-infrared absorption (BLINIRA) and its temperature dependence in ferroelectric crystals, i.e., MgO-doped stoichiometric-LiNbO3, congruent-LiNbO3, MgO-doped stoichiometric-LiTaO3, and stoichiometric-LiTaO3. We found the BLINIRA decreased with the increase of temperature.
We demonstrate room-temperature phase matching of second-harmonic generation by waveguide dispersion (WGD) in 3-mum-thick LiNbO3 membranes. The membranes were made using patterned deep-ion-implantation-guided etching.
The fluorescence lifetimes of the 2F5/2 level of Yb3+ in LaSc3(BO3)4, Li6Y(BO3)3, Ca4YO(BO3)3, Ca4GdO(BO3)3, and YVO4 were determined for various doping concentrations applying the pinhole method.
The first OPO experiment using a periodically poled Mg-doped congruent LiTaO3 device was demonstrated. The dependence of OPO output wavelength on the period of quasi-phase matching structure could be characterized.
Ce:LuLiF4 as fast scintillator is evaluated using a storage ring free-electron laser operated in deep ultraviolet region. The response time is found to be varied for the excitation of the different absorption band.
Resonator bistability in Ti:PPLN waveguide was tested experimentally. Spectrum changes were measured at different input powers and compared with theory. Parameters necessary for bistable operation are accessible via temperature and wavelength tuning.
Numerical modeling results of optically induced heating of the GLAS doubler explain the performance degradation in output energy of laser-I and II and partially laser-III and are consistent with the on-orbit telemetry.
We report the first successful micro-pulling down method growth and ultraviolet emission from a Ce:LiCAF crystal. With two-side pumping configuration, 23% slope efficiency is obtained from the 290-nm emission of a 30 mm-long, 2 mm-wide Brewster-cut crystal.
Tailored femtosecond pulses with fully engineered intensity and phase profiles are demonstrated using second-harmonic generation of an Er:fiber laser in an aperiodically-poled lithium niobate crystal. The profiles created include square, stepped, double and triple pulses.
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