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The application of a specific metal organice vapour phase epitaxy (MOVPE) growth process for (GaIn)As-based VECSEL using thermally more efficiently decomposing MO-group-V-sources results in an extended wavelength range and facilitates the necessary strain compensation of the highly compressive-strained (GaIn)As-quantum well layers by tensile-strained Ga(PAs) barrier layers. Applying a closed-loop-design...
Holmium-doped ZBLAN fiber has proven to be an efficient high gain material in the 1.2 µm region. In this paper, single-mode fiber lasers and amplifiers at 1178 nm, 1190 nm, and 1200 nm are reported. Over 2 watts of continuous wave output power was achieved with a 10-cm long gain fiber.
We present a gain-switched-diode-seeded 1034.5-nm master oscillator power amplifier, employing direct amplification through standard commercial Yb3+-doped fibres to generate 15.6µJ-pulse-energy, 126kW-peak-power, picosecond pulses with 3dB spectral bandwidth of 0.87nm.
We present the shortest pulses of any modelocked thin disk laser (TDL): a SESAM modelocked Yb:CALGO TDL generates 62-fs pulse duration at 5.1 W average power and we present new noise characterization.
A diode-pumped Yb:CLNGG laser is mode-locked with a single-walled carbon nanotube saturable absorber achieving pulse durations as short as 90 fs at ∼1049 nm and maximum average output power of 90 mW at 83 MHz.
We present a highly efficient laterally-coupled 1.55 µm DFB laser monolithically integrated with multistage MMIs and SOAs, using low bias currents and providing an output power of ∼100 mW with a low divergence angle.
A 1.8 W RF output power at 10 GHz and 60 % power conversion efficiency (PCE) at 6 GHz have been achieved using a modified uni-traveling-carrier photodiode flip-chip bonded on diamond.
A fast method is introduced to model high power, continuous wave Yb-doped fiber lasers. Excellent agreement with measurements is obtained for up to 708W output power within 5 minutes of computation on a desktop computer.
We report a diode-pumped Yb:LYSO laser with a SESAM for mode-locking. Pulse with duration as short as 61 fs was obtained at repetition rate of 113 MHz. The average output power was 40 mW.
We demonstrate a mode-locked Nd3+,Y3+:SrF2 laser for the first time. Pumped with 1.5W continuous Ti:sapphire laser, average output power of 280mW was obtained with pulse duration of 181fs at central wavelength of 1057 nm.
We present a SESAM modelocked diode-pumped Yb:CaGdAlO4 laser with a 1.8-GHz repetition-rate, a 3.5-W average output power and a 60-fs pulse duration, which results in a record high peak power of 28.9 kW.
Initial investigations to alleviate thermal lensing, a fundamental limitation in Raman lasers performance, are reported. An adaptive-optics feedback loop was incorporated into a Nd:YVO4 self-Raman laser demonstrating a 40% Raman output power increase.
With an improved gain chip and SESAM we set new benchmarks for modelocked electrically pumped VECSELs, i.e. shortest pulses (2.47 ps), highest average power (53.2 mW), peak power (4.7 W) and repetition rate (18.2 GHz).
A high-power MIXSEL combining 570-fs-pulses and repetition-rate scalability from 5 GHz to record high 101.2 GHz is presented. Additionally, we achieve record low timing jitters of a free-running and piezo-stabilized picosecond MIXSEL.
We report a low efficiency droop 520 nm green nano-pyramid InGaN/GaN multiple quantum well (MQW) LED. MQWs were grown on the semipolar {101̄1} nano-pyramid facets. The device physics will be discussed in details.
High power operation of a continuous-wave Alexandrite laser is reported. Output power of 2.6 W at 755 nm and tunability of 85 nm were achieved using 11 W of pump at 532 nm.
We present closed-loop adaptive phase compensation of a 1.3 kW solid-state slab laser system. Experimental results demonstrated the beam quality is greatly improved with the proposed adaptive optics system.
The effect of mode instabilities has become a strong limitation for the average power scaling of fiber lasers and amplifiers with nearly diffraction-limited beam quality. In this contribution it is shown that the output average power of rod-type fiber amplifiers can be efficiently increased well beyond the threshold of mode-instabilities. This way a new average output power record of 2 kW, with an...
We present soliton modelocking based on cascading of quadratic nonlinearities using an LBO crystal in a SESAM-modelocked Yb:CaGdAlO4 laser cavity, enabling pulse formation in the positive GDD-regime, reaching 114-fs pulses at 1.1-W average output power.
We describe the performance of an optimized high-temperature DS-DBR laser used as an uncooled WDM source. Constant wavelength output with less than 6GHz error without mode-hopping is shown for C-band channels from 70–90 °C.
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