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Efficient broadband spectrum oscillation was obtained directly from a laser-diode-pumped Kerr-lens mode-locked Yb:YAG laser with intracavity nonlinear media. The spectrum was expanded to around 1040 nm to 1070 nm. The spectrum is much broader than the fluorescence spectrum at 1050 nm.
We present the first observation of cryogenic operation in an all-solid-state refrigerator. A temperature drop of ~150 K is demonstrated in a 0.2 cm3 rare-earth doped fluoride crystal (Yb:YLF) using anti-Stokes fluorescence, at a record cooling power of 110 mW. Lowest electronic transition within Yb3+ Stark manifold along with cavity enhanced absorption and thermal-load management were key in achieving...
A compact, highly efficient and high-power SHG green laser has been newly developed for the first laser TV dasiaLaserVuepsila. Technical basic concepts and features of this laser are briefly summarized.
We report a pulsed fiber laser that generates 31-nJ chirped pulses at 70-MHz repetition rate and 2.2 W average power. After dechirping outside the cavity, 80-fs pulses, with 200-kW peak power, are obtained.
The output performances of a Nd:YAG laser passively Q-switched by Cr4+:YAG saturable absorber are investigated function of temperature. Small variations in pulse energy and duration were observed over the 25degC to 150degC range.
We have achieved over 25 Kw CW operation with Yb:YAG thin disks, which was achieved under very high performance conditions, where slope optical-optical efficiencies approaching 70%, strong ASE suppression, and high heat removal rates were demonstrated simultaneously. Discussion of numerous interacting parameters will be presented with supporting data.
The three thermo-optic coefficients of the biaxial laser host KLu(WO4)2 are measured at 633 nm by a deflection method and nearly athermal propagation directions are found for polarizations along the Nm and Np principal axes.
The carrier-envelope phase dynamics of octave-spanning Ti:sapphire lasers are analyzed based on a one-dimensional laser. It is found that self-steepening is the major contributor to the energy dependent carrier-envelope phase and that center-frequency-shifts are negligible.
We propose the ldquolevel parametersrdquo lscr0 and lscr1 to quantify the concept of two-, three- and four-level laser, for comparing different laser media, operating temperatures, and choices of pump and laser transitions.
We report a drastic coupling reduction between orthogonal modes of a Nd:YAG laser when the gain crystal is cut along the <100> axis instead of <111>. Our measurements are accurately described by a simple theoretical model.
We present a compact, passively mode-locked and prismless Nd:phosphate laser, pumped by a single-mode, low-power (150-mW) laser diode. We obtained self-starting 270-fs near transform-limited pulses, employing a single Gires-Tournois mirror for intracavity dispersion compensation.
We report the demonstration of a single-longitudinal-mode 593.5-nm laser achieved via intracavity sum-frequency generation of a dual-wavelength cw Nd:YVO4 laser using two volume-Bragg-grating reflectors. >2.5-mW 593.5-nm orange light was obtained with this compact laser system.
Slope efficiency as high as 80% has been achieved in Tm:fiber laser end-pumped adhesive free bonded (AFB) YAG/Ho:YAG/YAG laser composite. 18.7-W output power at 2.09 mum has been achieved at pump power of 24.3 W.
Over 108% single-pass net gains were achieved at wavelength of 1550 and 1500 nm both in highly transparent Er3+ doped and in Er3+ and Yb3+ codoped electro-optic lanthanum-modified lead zirconate titanate (PLZT) ceramics.
We demonstrate a ~1 GHz femtosecond optical parametric oscillator synchronously pumped by a 76-MHz Ti:sapphire laser using a cavity longer than the fundamental synchronous cavity length. Near-transform-limited pulses with average durations of 227 fs are generated.
Efficient 1.34-mum laser emission is realized in Nd-vanadates under pumping with diode lasers at 0.88 mum. A Nd:YVO4 crystal yielded 3.4-W output power for 9.3-W absorbed pump power, at a slope efficiency of 0.43.
Passive synchronization is demonstrated between the self-similar Yb-fiber and the stretched-pulse Er-fiber mode-locked lasers. The pulse repetition rates of the two mode-locked lasers can keep locked when multiple-pulse bound states or periodic pulse collisions occur.
We present our 2.3-kW Yb:YAG master oscillator power amplifier (MOPA) which has shown optical wall-plug efficiencies above 30-% with excellent beam quality. In addition, we will present our all-cryogenic Yb:YAG laser.
Current contrast-control-technology is inadequate for solid targets with the next generation of high-intensity lasers. We apply a spatiotemporal-contrast-concept (STC) to demonstrate that intensity ~1025 W/cm2 is feasible for transparent solids at STC ~1014.
Using a novel broadband Yb-doped crystal close-loop cooled at -130degC we demonstrate a 2-6-W multi-kilohertz amplifier delivering sub-200-fs pulses with energies up to 2 mJ. This technology is straightforwardly scalable toward a kHz-repetition-rate multi-mJ output.
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