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Analysis and mitigation of the factors limiting the efficiency of high power distributed feedback diode lasers (Band 27)64,98 €![Fundamental Limitations in the Measurement and Stabilization of the Carrier-Envelope Phase of Ultrashort Laser Pulses]( "Fundamental Limitations in the Measurement and Stabilization of the Carrier-Envelope Phase of Ultrashort Laser Pulses")
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Efficient frequency doubling of near-infrared diode lasers using quasi phase-matched waveguides27,90 €![Improvement of the beam quality of high-power broad area semiconductor diode lasers by means of an external resonator]( "Improvement of the beam quality of high-power broad area semiconductor diode lasers by means of an external resonator")
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Development of micro-integrated diode lasers for precision quantum optics experiments in space39,00 €
Picosecond laser pulses find diverse applications for example in material processing as well as in analysis and sensing. Fluorescence lifetime spectroscopy in particular requires pulses with variable repetition rate and moderate pulse energy. While suitable pulses in the red and blue spectral range can be provided by gain-switched laser diodes, the generation of green laser pulses requires a more elaborate setup based on second harmonic generation. The starting point is a gain-switched infrared distributed-feedback laser diode. The optimization of the laser design and the operating conditions allows to generate spectrally narrow picosecond pulses with a peak power above 1 W. Different gain media are compared for further amplification of these pulses, and options for the miniaturization of the master-oscillator power-amplifier system are explored. The resulting intense infrared pulses are then used for second harmonic generation of green picoseconds pulses. Their peak power of above 5 W exceeds all previous green pulse sources with variable repetition rate. In terms of pulse energy and background suppression, the reported green pulses are thus ideally suited for fluorescence lifetime spectroscopy