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High-speed optical data signal generation of >6.8 Gb/s with an error-free operation was successfully demonstrated using newly developed monolithically integrated quantum dot optical modulator and semiconductor optical amplifier operated in an ultra-broad optical frequency bandwidth.
We observed pulsations of Raman lasing on an optomechanically oscillating silica microsphere. The harmonic tones from the oscillation regeneratively produce 223.5-ns-width Raman laser pulses above a pump threshold of 186 μW.
OPCPA laser systems require a high-quality, high-energy picosecond pump. The challenges of energy scaling in multi-kilohertz systems include thermal loads, depolarization and gain extraction. We address these issues for a high energy/average power MOPA System.
We demonstrate an optically pumped GaSb-based mid-Infrared photonic crystal surface emitting laser (PCSEL) at 2.3μm with line width of 0.3nm. The PCSEL was operated with temperature up to 350K, showing a shift rate of 0.21 nm/K.
We suggest a novel hybrid nanoantenna, consisting of a gold nanorod and a silicon nanodisk, which provides giant enhancement of directional emission together with high radiation efficiency. We demonstrate its fabrication by two-step electron-beam lithography.
We describe an experimental demonstration of fiber-based optical phase-sensitive amplification for improved detection of correlated single-photon pairs. A measured coincidence gain of 4.5dB provides 3dB improvement in the detection system signal-to-noise ratio.
By performing ultrafast emission spectroscopy in an operating, bias-controlled photoelectrochemical cell, we distinguish between bulk (charge transport) and surface (chemical reaction) recombination processes in a nanostructured photocatalyst and correlate its electronic properties directly with its incident-photon-to-current efficiency.
We report on design, fabrication and investigation of a buried heterostructure photonic crystal quantum cascade laser operating in the mid-IR (8.5μm) at room temperature, leading to single mode emission on a 600μm by 600μm mesa.
Stable operation with energy >100mJ of the Yb:YAG thin disk regenerative amplifier at 1kHz has been achieved. The amplifier is being developed as a pump for the picosecond OPCPA of the L1 beamline at ELI-Beamlines.
We report on a chirped-pulse regenerative thin-disk amplifier generating 220 mJ pulse energy at 1 kHz repetition rate with a pulse duration of 1.9 ps for pumping few-cycle optical parametric amplifiers (OPA).
We demonstrated a silica-based Raman all-fiber amplifier delivering as much as 14.3W of output power at a wavelength of 2147nm. The conversion efficiency for the Raman fiber amplifier was 38.5% from 1963nm to 2147nm.
We reconstruct the polarization-entangled state of individual frequency components of the biphoton wave function by stimulated emission tomography. The frequency-resolved polarization state enables new insight into frequency-polarization correlations of the quantum process.
We experimentally demonstrate transmission of non-orthogonal two-qubit states in a χ(3)-based optical phase-sensitive amplifier (OPSA). State analysis shows that the OPSA improves the transmission probability of both non-orthogonal states without measurable degradation in two-photon visibility.
We demonstrate highly circularly polarized lasing under non-resonant elliptically polarized optical pumping in a semiconductor microcavity at room temperature.
We analyze, analytically and computationally, light emission in nonlocal plasmonic nanowire metamaterials and analyze the contribution of longitudinal wave to the density of optical states in the system.
A three-stage optical parametric amplifier is built to produce 1 kHz, 31 fs, ∼200 μJ signal pulses with tunable wavelengths. Red-activatable channelrhodopsin in fruit fly is optimally two-photon excited to copulation behavior at 1250 nm.
A chirped-pulse amplification technique is implemented for the first time in a picosecond CO2 laser. A considerable increase in peak power is achieved, mainly as a result of eliminating nonlinear effects in the optical elements.
An analytical technique for determining the radiative current in optically pumped gain media is presented. A means of seperately identifying the effects of gain compression and pump non-uniformities in amplified spontaneous emission spectra is introduced.
We report on a single-frequency nested cavity OPO based on OP-GaAs, pumped by a pulsed Tm:YAP microlaser. The threshold energy is 10 μJ and temperature tuning enables to cover the 10.3–10.9 μm range.
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