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Generation of picosecond pulses and optical frequency combs with multi-section 1065nm ridge waveguide diode lasers
/forschung/publikationen/generation-of-picosecond-pulses-and-optical-frequency-combs-with-multi-section-1065nm-ridge-waveguide-diode-lasers
Mode-locked diode lasers generate reliably picosecond or even sub-picosecond optical pulses. Especially, colliding pulse mode-locked (CPM) lasers are promising sources for the generation of short…
100,000 h estimated lifetime of 100-µm-stripe width 650 nm broad area lasers at an output power of 1.2 W
/forschung/publikationen/100000nbsph-estimated-lifetime-of-100-um-stripe-width-650nbspnm-broad-area-lasers-at-an-output-power-of-12nbspw
Compared to longer wavelength devices, the development of reliable red-emitting diode lasers is more challenging due to the applicable semiconductors and the limited stability of the laser facets.…
Short pulse generation by Q-switching two section tapered lasers
/forschung/publikationen/short-pulse-generation-by-q-switching-two-section-tapered-lasers
High power two-section tapered lasers are promising candidates to generate short optical pulses by Q-switching. The main advantage of these devices is that high peak optical power can be generated by…
High luminance tapered diode lasers for flying-spot display applications
/forschung/publikationen/high-luminance-tapered-diode-lasers-for-flying-spot-display-applications
Flying-spot display applications require high luminance (> 100 TCd/m²) red-emitting lasers. High luminance is defined as a high optical output power and a nearly diffraction limited beam quality…
An 8W GaN-Based H-Bridge Class-D PA for the 900 MHz Band Enabling Ternary Coding
/forschung/publikationen/an-8w-gan-based-h-bridge-class-d-pa-for-the-900nbspmhz-band-enabling-ternary-coding
This paper presents an H-bridge class-D power amplifier (PA) for the 900 MHz band based on GaN MMICs. For a classical BPDS modulated signal, a maximum output power of 34.5 dBm with a drain…
Prediction of Single-Mode Fiber Coupling Efficiencies of a Tapered Diode Laser From Measured Wigner Distribution Functions
/forschung/publikationen/prediction-of-single-mode-fiber-coupling-efficiencies-of-a-tapered-diode-laser-from-measured-wigner-distribution-functions
In this letter, we demonstrate how the coupling efficiency of a tapered diode laser (TPL) into a single-mode fiber under specified conditions can be predicted from measured Wigner distribution…
Porous Nanostructures and Thermoelectric Power Measurement of Electro-Less Etched Black Silicon
/forschung/publikationen/porous-nanostructures-and-thermoelectric-power-measurement-of-electro-less-etched-black-silicon
We report the morphology evolution of porous silicon nanostructures and thermoelectric characterization of silicon nanowires (SiNWs) of Electro-Less Etched (ELE) black silicon. Along the axial…
Passively mode-locked 1 GHz MOPA system generating sub-500-fs pulses after external compression
/forschung/publikationen/passively-mode-locked-1nbspghz-mopa-system-generating-sub-500-fs-pulses-after-external-compression
We compared the performance of DQW and TQW edge-emitters in a passively mode-locked 1GHz MOPA system at 1075 nm wavelength. Passive mode-locking is induced by applying a reverse DC voltage to…
Progress in High Brilliance Lasers
/forschung/publikationen/progress-in-high-brilliance-lasers
Increasing demands on brightness for laser applications is the driving force of research on high-power diode lasers. Status and current developments of monolithic und hybrid solutions for high…
Buried DFB gratings floating in AlGaAs with low oxygen contamination enable high power and efficiency DFB lasers
/forschung/publikationen/buried-dfb-gratings-floating-in-algaas-with-low-oxygen-contamination-enable-high-power-and-efficiency-dfb-lasers
We report a novel design and fabrication technique for buried overgrown DFB gratings floating in AlGaAs. In-situ etching enables low oxygen contamination and results in > 60% efficient and…