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A linearly polarized fiber laser emitting at 979 nm with an output power of 2 W is presented. By using a photodarkening-resistant Yb/Ce/Al-codoped silica fiber, degradation-free operation is achieved over several hours.
We report a highly versatile gas phase technique for making ytterbium doped silica fibers. Initial results generated 200W output power with a slope efficiency of 72%.
Output powers in excess of 2W are reported for a microchip laser including diamond. These compare to 0.3W without diamond for the same configuration. Approaches to simultaneously scaling of brightness are discussed.
All-epitaxial oxide-free vertical-cavity surface-emitting lasers (VCSELs) are demonstrated. 4-µm-diameter VCSEL is shown with threshold current of 350 µA, slope efficiency of 0.77 W/A, wall-plug efficiency of 21% and output power of 6.3 mW.
We have demonstrated nanorod lateral overgrowth to reduce dislocation density in a-plane GaN. Subsequently, we grow green a-plane light-emitting diodes using nanorod lateral overgrowth. Output power of 0.5 mW was measured at 20 mA.
We report on the self-guided operation of a singly resonant, thermally loaded CW OPO and its improved characteristics of mode quality and stability in the case of a MgO:PPLN crystal pumped at 532 nm.
We report picosecond fiber MOPA pumped supercontinuum source with 39W output, spanning at least 0.4–1.75µm with high and relatively uniform spectral power density of ∼31.7mW/nm corresponding to peak power density of ∼12.5W/nm in 20ps pulse.
We report on a narrow-band (<;0.7nm) optical parametric oscillator operating at degeneracy. By using a volume Bragg grating a signal power of 1.7W with a slope efficiency of 31.8% and good beam quality was achieved.
We report the first operation of a Ti:sapphire laser pumped by fiber laser. Using a high-power, cw, frequency-doubled Yb-fiber source at 532nm, continuous-wave operation over 806–970nm with output power >1.1W in TEM00 spatial beam is demonstrated.
We report stable, continuous-wave, mid-infrared optical-parametric-oscillator based on MgO:PPLN, pumped by Yb-fiber-laser, generating total power of 17.5W at 61% extraction efficiency, in TEM00(M2 Idier <1.24,M2 Signal<1.24) spatial mode with peak-peak idler power stability of 5% over 14 hours.
A Ho:LuLiF4 laser with an output power of 5.4W and slope efficiency of 76% at 2.1mm in-band pumped by a Tm fiber laser at 1.94mm is reported. Strategies for further increasing output power are considered.
PPMgSLT is used for mode-locking of a diode-pumped Nd:GdVO4 laser by intracavity SHG. Stable and self-starting operation is observed achieving output powers of up to 4.7 W and pulse durations as short as 3.2 ps.
We report on a high-average-power 888 nm diode-pumped passively mode-locked TEM00 Nd:YVO4 oscillator with adjustable pulse durations. From 45 to 15 W output power, we produced corresponding 32 to 12 ps long pulses without spatial hole burning.
We demonstrated 105 W pico-second output from a cascaded Nd:YVO4 amplifier laser system consisting of a Nd:YVO4 bounce amplifier with a photorefractive phase-conjugate mirror and a second diode-side-pumped Nd:YVO4 bounce power amplifier.
We report the development of AlGaN-based deep UV LEDs by plasma-assisted molecular beam epitaxy, which at bare-die configuration have an output power of 1.3 mW at 200 mA and external quantum efficiency of 0.16%.
The growths and characteristics of staggered InGaN quantum wells (QWs) and type-II InGaN-GaNAs QWs are presented for high-efficiency green-emitting light-emitting diodes (LEDs). Approaches for enhancing internal-quantum-efficiency, light-extraction-efficiency, and efficiency-droop in nitride LEDs are discussed.
We report the longest stable laser emission at 3.8 W over 65 hours in a Er-doped fluoride fiber laser at 2.936 μm. The slope efficiency was 24% with respect to the launched pump power.
Based on effective third-harmonic generation in two-section dual-period periodically-poled KTP crystal being placed inside the cavity of adhesive-free bond composite Nd:YAG laser, we generated coherent blue light with output power reaching 200 mW.
Based on a novel configuration of a dual-frequency laser system constructed from a Nd:YLF crystal, we have synchronized Q-switched laser pulses at 1047 nm and 1053 nm.
A diffraction-limited narrow-linewidth diode laser system based on a tapered amplifier in external cavity is demonstrated. 1.38 W output power is obtained. The laser system is tunable from 659 to 675 nm.
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