Search Results - "Klehr, A."

Novel passivation process for the mirror facets of Al-free active-region high-power semiconductor diode lasers by Ressel, P., Erbert, G., Zeimer, U., Hausler, K., Beister, G., Sumpf, B., Klehr, A., Trankle, G.

“…A novel process for the passivation of mirror facets of Al-free active-region high-power semiconductor diode lasers is presented. Designed for technological…”
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High-power 980-nm DFB RW lasers with a narrow vertical far field by Wenzel, H., Fricke, J., Klehr, A., Knauer, A., Erbert, G.

“…We compare 980-nm distributed-feedback ridge-waveguide lasers having cavity lengths of 1.5 and 3 mm. The maximum single-mode output powers are 500 and 700 mW,…”
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High-Power 980-nm Broad-Area Lasers Spectrally Stabilized by Surface Bragg Gratings by Fricke, J., Bugge, F., Ginolas, A., John, W., Klehr, A., Matalla, M., Ressel, P., Wenzel, H., Erbert, G.

“…We report on broad-area distributed Bragg reflector (DBR) lasers with a stripe width of 90 ¿m providing up to 14-W optical power and 50% maximum conversion…”
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Generation of spectrally stable continuous-wave emission and ns pulses with a peak power of 4 W using a distributed Bragg reflector laser and a ridge-waveguide power amplifier by Klehr, A, Wenzel, H, Fricke, J, Bugge, F, Erbert, G

“…We have developed a diode-laser based master oscillator power amplifier (MOPA) light source which emits high-power spectrally stabilized and nearly-diffraction…”
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Dynamics of a gain-switched distributed feedback ridge waveguide laser in nanoseconds time scale under very high current injection conditions by Klehr, A, Wenzel, H, Brox, O, Schwertfeger, S, Staske, R, Erbert, G

“…We present detailed experimental investigations of the temporal, spectral and spatial behavior of a gain-switched distributed feedback (DFB) laser emitting at…”
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High power laser pulses with voltage controlled durations of 400 - 1000 ps by Harth, F, Ulm, T, Lührmann, M, Knappe, R, Klehr, A, Hoffmann, Th, Erbert, G, L'huillier, J A

“…We report on the generation and amplification of pulses with pulse widths of 400 - 1000 ps at 1064 nm. For pulse generation an ultra-fast semiconductor…”
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Picosecond pulses with 50 W peak power and reduced ASE background from an all-semiconductor MOPA system by Schwertfeger, S., Klehr, A., Hoffmann, T., Liero, A., Wenzel, H., Erbert, G.

“…Using a single-stage all-semiconductor master oscillator-power amplifier system, consisting of a Q-switched distributed Bragg reflector laser as master…”
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The influence of the gate trench orientation to the crystal plane on the conduction properties of vertical GaN MISFETs for laser driving applications by Treidel, E. Bahat, Hilt, O., Christopher, H., Klehr, A., Ginolas, A., Liero, A., Wurfl, J.

“…Vertical GaN based MISFETs for high voltage power switching applications have the potential to outperform Si and SiC based competitors in terms of power…”
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High-Power Monolithic Two-Mode DFB Laser Diodes for the Generation of THz Radiation by Klehr, A., Fricke, J., Knauer, A., Erbert, G., Walther, M., Wilk, R., Mikulics, M., Koch, M.

“…We have devolved 1064 nm high-power monolithic distributed feedback lasers which operate simultaneously on two longitudinal modes. These modes correspond to…”
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Numerical simulation of the amplification of picosecond laser pulses in tapered semiconductor amplifiers and comparison with experimental results by Tronciu, V.Z., Schwertfeger, S., Radziunas, M., Klehr, A., Bandelow, U., Wenzel, H.

“…We apply a traveling wave model to the simulation of the amplification of laser pulses generated by Q-switched or mode-locked distributed-Bragg reflector…”
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New Two-Color Laser Concepts for THz Generation by Friedrich, C.-S., Brenner, C., Hoffmann, S., Schmitz, A., Mayorga, I.C., Klehr, A., Erbert, G., Hofmann, M.R.

“…Two-color semiconductor external cavity laser concepts for terahertz (THz) generation are discussed. By defining three critical characteristics, various…”
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Femtosecond diode laser MOPA system at 920 nm based on asymmetric colliding pulse mode-locking by Ulm, T., Klehr, A., Erbert, G., Harth, F., L’huillier, J. A.

“…We report on the generation of 267 fs long pulses with a peak power of 661 W emitted by an InGaAs diode laser master-oscillator power-amplifier (MOPA) system…”
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Rapid shifted excitation Raman difference spectroscopy with a distributed feedback diode laser emitting at 785 nm by MAIWALD, M, ERBERT, G, KLEHR, A, KRONFELDT, H.-D, SCHMIDT, H, SUMPF, B, TRÄNKLE, G

“…A distributed feedback (DFB) laser diode emitting at 785 nm was tested and applied as a light source for shifted excitation Raman difference spectroscopy…”
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High-Power Picosecond Pulse Generation Due to Mode-Locking With a Monolithic 10-mm-Long Four-Section DBR Laser at 920 nm by Schwertfeger, S., Klehr, A., Liero, A., Erbert, G., Trankle, G.

“…A 10-mm-long four-section distributed Bragg reflector laser with a double-quantum-well heterostructure at 920 nm was realized. A maximum optical pulse power of…”
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High-power 894 nm monolithic distributed-feedback laser by Klehr, A, Wenzel, H, Brox, O, Bugge, F, Erbert, G, Nguyen, T-P, Tränkle, G

“…A ridge-waveguide InGaAs/GaAsP laser, emitting up to 250 mW in a single lateral and longitudinal mode at a wavelength of 894 nm, is presented. The distributed…”
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Compact hybrid master oscillator power amplifier with 3.1-W CW output power at wavelengths around 1061 nm by Schwertfeger, S., Klehr, A., Erbert, G., Trankle, G.

“…A hybrid master oscillator power amplifier (MOPA) laser source has been realized by coupling a single-mode three-section distributed Bragg reflector (DBR)…”
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9-W Output Power From an 808-nm Tapered Diode Laser in Pulse Mode Operation With Nearly Diffraction-Limited Beam Quality by Dittmar, F., Klehr, A., Sumpf, B., Knauer, A., Fricke, J., Erbert, G., Trankle, G.

“…808-nm tapered diode lasers are fabricated based on a super-large optical-cavity (SLOC) structure with very small divergence of 18deg full width at…”
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Five-hundred-milliwatts distributed-feedback diode laser emitting at 940 nm by Klehr, A., Wenzel, H., Braun, M., Bugge, F., Fricke, J., Knauer, A., Erbert, G.

“…A DFB laser emitting at a wavelength around 940 nm in a single longitudinal mode up to an output power of 500 mW with a side mode suppression ratio greater…”
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Five-hundred-milliwatts distributed-feedback diode laser emitting at 940nm by Klehr, A., Wenzel, H., Braun, M., Bugge, F., Fricke, J., Knauer, A., Erbert, G.

“…A DFB laser emitting at a wavelength around 940nm in a single longitudinal mode up to an output power of 500mW with a side mode suppression ratio greater than…”
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Broad-area lasers with internal surface Bragg gratings for wavelength stabilization at 980nm by Fricke, J, Bugge, F, Ginolas, A, John, W, Klehr, A, Matalla, M, Ressel, P, Wenzel, H, Erbert, G

“…Results of Broad-area distributed Bragg reflector (DBR) lasers with internal 6 th order surface Bragg grating will be presented. More than 15W optical power…”
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