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Design considerations for quasi-planar, high-Q, silicon-on-insulator microphotonic resonators are presented. A figure of merit for use in comparison between microphotonic designs is presented and applied to compare existing and proposed designs.
New geometry for edge-pumping composite solid-state microchip laser suitable for high power scaling is presented. Yb:YAG/YAG composite device with 200-mum thick 15-at.% Yb:YAG of 3.6-mm diameter produced on-time 34 W output power with 0.26 slope efficiency.
We report a compact, narrow-line intracavity OPO with a grazing-incidence grating. This kHz pulsed OPO fits into a 25 times 25 cm area, generating 30 muJ/pulse at 1560 nm with a linewidth of 0.8 cm-1.
Multimode operation of an optical parametric oscillator operating below threshold is calculated. We show that maximal squeezing can be obtained at high frequency even in the presence of seed laser noise and cavity length fluctuations.
Highly efficient cavity dumping of Yb:YAG laser has been realized at room temperature with the optical to optical conversion efficiency of 72% for the absorbed pump power.
We demonstrate mode switching in tandem quasi-stadium laser diodes. Switching is achieved by optical injection between lasing in the cavity axis and the closed ring trajectory of a quasi-stadium laser resonator.
Two types of supermode noise, uncorrelated and correlated, are demonstrated for two different types of harmonically modelocked lasers. The correlated supermode noise is originated from the excitation of multiple correlated optical supermodes.
Control of the carrier-envelope phase by a composite glass plate is demonstrated without changing chirp or energy of the transmitted pulses. The effect is verified intracavity employing an octave-spanning laser and external with an autocorrelator.
The development of high finesse resonators for broadband frequency combs enabled the extension of the versatile frequency comb technique into the extreme ultraviolet with all its implications. We describe new developments in this field.
An inhomogenous quantum-cascade structure based on two bound-to-continuum designs was used as gain element in a grating-coupled external cavity laser. This laser was tunable from 8.2 to 10.4 mum in pulsed mode on a thermoelectric cooler.
We study the characteristics of ground-state and excite-state mode-locked pulse trains generated from an external cavity quantum dot mode-locked laser.
We report progress with diode-pumping of garnet crystal waveguide structures fabricated by PLD. Lasing has been achieved in a single-layer Nd:GGG film, and a four-layer structure with a Nd:GSGG core is currently undergoing laser trials.
A tunable photonic crystal laser based on two coupled cavities was integrated with a wavelength monitor. The monitor is based on a compact, multimode photonic crystal waveguide together with a photodiode.
We discuss carefully characterized semiconductor disk lasers with high spatial and spectral homogeneity, exhibiting 23% conversion efficiency and a 540-mW output power for cw operation. Passive mode-locking with 1.5-ps pulse duration is also demonstrated.
We demonstrate a high quality optical cavity with a 30 micron mirror on a micromechanical resonator. An optical finesse of 2100 is measured via cavity ring-down. High mechanical quality of the resonator is also observed.
EIT-based atomic clocks built as active oscillating loops can be compact and low-power, if the loop is closed by current modulation of VCSEL. The clock performance is shown to critically depend on the VCSEL properties.
We demonstrate characteristics of InAs/GaAs quantum-dot photonic-crystal lasers with high spontaneous emission coupling efficiencies and soft-turn-on behaviors. Pronounced bunching signals subside with the increase of pumping, revealing the onset of lasing operations.
Sum frequency data are reported from the nonlinear interaction of two coherently excited resonant modes of a two-dimensional planar photonic crystal microcavity patterned in a free-standing InP slab.
Novel quasi-guided optical waveguide (QGOW) VCSELs is presented and analyzed for lateral mode control in large-aperture single-mode high-power VCSELs, with large modal discrimination in excess of 20 cm-1 and low fundamental mode loss.
We report high-performance single-frequency operation of a directly diode pumped GaSb vertical-external-cavity surface-emitting laser (VECSEL) at 2.3 mum. Tunability of >25 nm with a maximum single frequency output of 0.68 W is demonstrated.
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