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Efficient Terahertz output is generated from InGaN/GaN dot-in-a-wire light emitting diodes (LEDs) grown on Si(111). Under reverse bias, the THz output power is enhanced more than 4 times.
A cw triple-wavelength selectable Nd:GdVO4 laser was demonstrated. When switching the dc voltages and applying 25 W pump power, the output wavelength can be selected among 912, 1063, and 1342 nm with watt-level output power.
We report on a 200W, 2mJ, 25ns MOPA fiber laser, the last stage of which has a hybrid gain fiber composed of large-core-diameter and small-core diameter Yb doped fibers.
Co-seeding method at 1.0μm was applied in order to scale up the 1.5μm output power of a 976nm pumped single-frequency Er:Yb-codoped triple clad fiber amplifier to a maximum output power of 50W.
We present an Yb:YAG modelocked thin-disk laser with a record-high average output power of 275 W, a pulse duration of 583 fs and a pulse energy of 16.9 μJ. Furthermore, we present first experiments towards higher pulse energies.
We demonstrate 2W CW output power with a DBR QCL mounted epi-down at 20 °C. Single mode operation with a SMSR of 30 dB was achieved with the wavelength around 4.48 μm. The maximum pulsed peak power of this laser reached 3.36 W at 20 °C. The maximum pulsed and CW WPEs reached 14.7 % and 10.3 % at 20 °C, respectively.
High-brightness 910 nm wavelength edge-emitting laser arrays integrated with a phase-shifter have been designed. Over 450 mW/facet with M2 < 3 is achieved experimentally. Such devices show bright future for low cost and easy fabrication.
We report on our research in power scaling OPSL around 1μm to exceed 100W per chip by combining a rigorous quantum design of an optimized MQW epitaxial structure, highly accurate and reproducible wafer growth and an efficient thermal management strategy. Recently, we have utilized these state-of-the-art optimized OPSL chips to achieve a new record single frequency output power of 15W. The highly coherent...
The talk will focus on advances in high power single longitudinal/transverse mode master oscillator power amplifier (MOPA) QCls and MOPA QCL arrays capable of broadband tuning, as well as on low-divergence high brightness plasmomic QCLs
The design ideas of thin disk lasers will be explained in detail. Experimental results for continuous wave operation and for pulsed operation show the capability for building high power lasers with high efficiency and good beam quality, simultaneously. Modelling the thin disk laser behaviour shows the possible power and energy scalability.
We report a Nd3+-doped double-clad fiber laser with a record output power of 20 W at 910nm. A laser conversion efficiency as high as 44% was achieved in CW operating mode.
“Cryolaser” diode laser designs exploit the improvement in semiconductor material properties at sub-zero temperatures to increase efficiency and power. Optimized single 9xx-nm laser bars demonstrate record peak pulse energy of 2 J (1.7 kW, 1.2 ms, −50°C).
We present a CW and Q-switched Ho:YAG laser resonantly dual-end-pumped by four diode-pumped Tm:YLF lasers at 1.908 μm. The maximum CW output powers of 111 W at 2.122 μm have been obtained.
We present a single frequency Nd:YVO4 microchip laser operating at 1064 nm with monolithic laser resonator containing of birefringent filter as a single mode selector. It supports stable operation with 0.5W output power with 42% efficiency.
We present a laterally-coupled 1.55 μm AlGaInAs/InP DFB laser monolithically integrated with an optical amplifier, providing an output power of 210 mW with single mode operation exhibiting a record low linewidth of 64 kHz.
The effective ion lifetime is the most important quantity describing the temporal dynamics in a fiber amplifier. We show a fiber characterization method which allows us to derive it from output and residual pump power.
We demonstrate record power and efficiency for 1.5micron fiber lasers using a cascaded Raman laser based on a new architecture with output power of 301W at 1480nm and optical to optical conversion efficiency of 42%.
Power scaling of Kerr-lens mode-locked Cr:ZnS femtosecond oscillator allows reaching 1 W output power and pulse energies over 8 nJ. Soliton and chirped-pulse regimes result in 68 fs and 0.8–2 ps pulses, respectively.
UVC light output of 66 mW at 300 mA CW has been achieved from LEDs on AlN substrates with extensive photon extraction. Proper vessel design allows for efficient irradiation of a water sample for purification.
We report on polarization and reflectivity effects in FOPO output coupling. Polarization-based output coupling improves output power. Linear polarization and output coupling of 0.35 to 0.48 yields optimum output power with the current setup.
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