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We present the first experimental demonstration of a novel class of hybrid III–V on silicon microlasers. This new type of laser revolves around the concept of resonant mirrors: two silicon cavities, directly coupled to the III–V laser mesa, provide high, narrow band reflection over a short distance. This results in a device that measures only 55 µm by 2µm and shows single-mode laser emission with...
We present direct bandgap photoluminescence from carrier confinement in Ge/SiGe quantum wells in a microdisk resonator. Based on simulation and experimental results, the Ge/SiGe quantum well structure has great potential to serve as a low pump power Ge laser.
16+ low-noise optical comb lines with 80 GHz spacing and 0 dBm/line output power are generated by a single InAs/GaAs quantum dot (QD) Fabry-Perot laser. Electrical power consumption is reduced dramatically down to 6 mW/line.
We theoretically incorporate quantum coherent absorption in an actively modelocked quantum cascade laser. The laser self-starts from initial quantum noise and produces a stable train of modelocked pulses at high pump powers.
All-fiber-based narrow linewidth nanosecond pulsed lasers in MOPA configuration are reviewed, and their applications in nonlinear frequency conversion are discussed.
We demonstrate dual wavelength operation, wavelength switching, and bistable behaviour in a Tm:ZBLAN fibre laser operating at 800 nm. The lasers are built in both single and cascaded-cavity configurations.
We proposed a fiber Bragg grating based Pr3+-doped down conversion fiber lasers for red and green light generation. Numerical simulations investigate both steady state and Q-switching dynamics that qualitatively agree well with previous experimental demonstrations.
Peak Power above 1 PW was obtained from a femtosecond Ti:sapphire laser facility based on DCPA technique. With optical parametric amplification clean the seeding pulse, we measured contrast ratio up to 1010 in picosecond range.
We demonstrate a novel saturable absorber based on diamond thin film directly synthesized on quartz substrates by microwave plasma chemical vapor deposition method. The function of mode-locking for the fiber laser is achieved utilizing the diamond thin film.
A diode pumped CW Erbium (Er)-doped Zr-Ba-La-Al-Na (ZBLAN) fluoride glass fiber laser operating at 2.78 µm was demonstrated using a guided mode resonance filter (GMRF) as an external cavity mirror.
Data are presented demonstrating, to our knowledge, the first monolithic chip integrating a semiconductor laser with a spontaneous light emitting diode optical pump that can also act as a heat pump. The light emitting diode operates in the voltage bias regime needed to generate a thermoelectrophotonic heat absorption. Under ideal operation the light emitting diode can efficiently optically pump the...
We report the first experimental observation of periodic oscillations in an optically spin-injected GaInNAs/GaAs 1300 nm VCSEL under CW pumping and operated at room temperature. We show that the stability of the VCSEL can be controlled with the pump ellipticity. 11 GHz periodic oscillations were observed with the device subject to circularly-polarized (left or right) optical pumping. The highest RF...
We study the cutoff extension and efficiency scaling of high-harmonic generation in Xe, Kr, and Ar using a kHz 2.1-µm OPCPA pumped by a picosecond cryogenic Yb:YAG amplifier. High-harmonic spectroscopy and propagation effect are discussed.
We improve the efficiency and divergence of high-order harmonics from carbon plasma, which could be pumped with sub-mJ laser. This opens the possibility for high repetition rate experiments with intense attosecond pulses.
We study continuous-wave laser operation of a Cr:ZnSe:glass composite waveguide. Results show the influence of propagation losses on the power conversion efficiency, pumping range and the wavelength tunability of the laser.
Electron correlation is one of the main frontiers of modern science and of fundamental importance to such diverse fields as, e.g., many body systems, superconductivity and quantum computing. At the ultrafast laser frontier electron correlation has found prominence in the dramatic enhancement of multiple ionization [1] and high harmonic generation [2]. The underlying mechanism, called recollision [3],...
We demonstrate the generation of low divergence, spatially coherent, high-order harmonics (orders ranging from 23rd to 95th) using commercial sub-TW laser system. The 6 mJ, 32 fs laser pulses were loosely focused with f/125 concave mirror in a semi-infinite gas cell. The beam divergence was measured to be 0.18-mrad at the 59th harmonics (13.5 nm) in 18kPa of helium. The 59th harmonics with novel high-throughput,...
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