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We report on jitter reduction and frequency tuning ability of 1.31 µm 40 GHz quantum-dot mode-locked lasers with the main focus on hybrid mode locking. The frequency of the external electrical source is usually chosen to be close to the passive frequency of the mode-locked laser, which is increasingly difficult for high frequencies far beyond 40 GHz. Sub-harmonic mode locking is demonstrated, showing...
We compare dynamical properties of ground and excited state emission from 1.31 µm quantum-dot lasers. Dichroic facet mirrors ensure oscillations at either ground or excited state. Maximum bandwidths observed are 10.51 and 16.25 GHz, respectively.
1480nm InGaAsP large optical cavity broad-area laser diodes have been developed and optimized for pulsed and CW operation. The optical output powers at 20°C are 18 W and 3.7 W, respectively. In accelerated ageing tests no noticeable degradation was observed.
1480nm InGaAsP large optical cavity broad-area laser diodes were developed and optimized for pulsed operation showing optical output power of >18W at 20°C. Furthermore the µs pulse duration regime was investigated with respect to power saturation and self-heating at elevated operating currents.
High-power broad area (BA) laser diodes in the NIR around 1500nm become more and more interesting for material processing, medical and security applications, and pumping of crystals to realise solid state lasers. Efficient light coupling is a stringent requirement in all these applications and necessitates lasers with a narrow and preferably symmetric optical far-field.
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