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Comparison of an Yb-doped Fiber and a Semiconductor Taper for Amplification of Picosecond Laser Pulses
/forschung/publikationen/comparison-of-an-yb-doped-fiber-and-a-semiconductor-taper-for-amplification-of-picosecond-laser-pulses
In this paper, we compare two amplifier technologies, an ytterbium-doped fiber, and a semiconductor taper, regarding their suitability to amplify sub-100 ps pulses. With both setups, we obtain…
Limitations to Peak Continuous Wave Power in High Power Broad Area Single Emitter 980 nm Diode Lasers
/forschung/publikationen/limitations-to-peak-continuous-wave-power-in-high-power-broad-area-single-emitter-980-nm-diode-lasers
Micro-channel cooling of 975nm single emitter broad area lasers has largely eliminated current heating as a power limitation. Instead, the peak achievable power is limited by high-current driven…
12.2 W output power from 1060 nm DBR tapered lasers with narrow spectral line width and nearly diffraction limited beam quality
/forschung/publikationen/122-w-output-power-from-1060-nm-dbr-tapered-lasers-with-narrow-spectral-line-width-and-nearly-diffraction-limited-beam-quality
In this contribution two-sectional Distributed Bragg Reflector (DBR) tapered lasers with a 6th order surface grating are presented. They emit with a maximal cw output power of 12.2 W at a wavelength…
Improving the brightness of tapered diode laser using reverse bias absorber sections
/forschung/publikationen/improving-the-brightness-of-tapered-diode-laser-using-reverse-bias-absorber-sections
A cavity design is presented in this paper, where the filtering propertiesof the ridge waveguide section are increased by using reverse bias absorber sections next to the ridge waveguide. Due to…
A new concept of an ultra fast pulse picker for fs- and ps-pulses from GHz pulse-trains with semiconductor tapered elements
/forschung/publikationen/a-new-concept-of-an-ultra-fast-pulse-picker-for-fs-and-ps-pulses-from-ghz-pulse-trains-with-semiconductor-tapered-elements
In this paper, we present a new concept for an ultra fast pulse picker, consisting of a tapered diode amplifier and a high-speed high-current transistor switch. The transistor switch is realized…
High-power distributed feedback diode laser at 780 nm with sub-100 kHz linewidth
/forschung/publikationen/high-power-distributed-feedback-diode-laser-at-780nbspnm-with-sub-100-khz-linewidth
In this paper we report on the development of high power narrow linewidth DFB diode lasers for these applications. We analyze the electro-optical properties and short term linewidth of DFB lasers for…
Temperature Dependence of Picosecond Pulse Spectra of a DFB Laser
/forschung/publikationen/temperature-dependence-of-picosecond-pulse-spectra-of-a-dfb-laser
High-power distributed feedback (DFB) laser diodes are well established for continuous-wave (CW) applications. In this paper, the spectrum of high power DFB lasers under gain-switching operation is…
Calculation of improved features of distributed-feedback tapered master-oscillator power-amplifiers
/forschung/publikationen/calculation-of-improved-features-of-distributed-feedback-tapered-master-oscillator-power-amplifiers
Summary form only given. During recent years, compact lasers emitting single-frequency, diffraction limited continuous-wave CW beams at an optical power of several Watts have received considerable…
190-fs Semiconductor Disk Laser and Tapered Diode Amplifier with Ultrafast Pulse Picking
/forschung/publikationen/190-fs-semiconductor-disk-laser-and-tapered-diode-amplifier-with-ultrafast-pulse-picking
Optically-pumped semiconductor disk lasers (SDLs) promise to be versatile femtosecond sources, because they can be tailored for almost any wavelength. Very recently, by passive mode-locking of SDLs…
Determination of the thermal lensing in a broad area semiconductor laser amplifier
/forschung/publikationen/determination-of-the-thermal-lensing-in-a-broad-area-semiconductor-laser-amplifier
We propose a simple experiment that allows to measure the thermal lens created in a semiconductor laser amplifier by current pumping of the device. In this technique, we make use of the deviation of…