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Compact pulsed laser sources are of interest for diverse application areas. Due to their broad gain bandwidth, high Stokes efficiency and low thermal load near the 1 μm spectral region, ytterbium doped laser materials are promising for such devices. Channel waveguides in such gain media provide compact laser systems and deliver efficient single-mode laser operation with low laser thresholds. One of...
We demonstrate that a novel family of miniaturized deformed helix ferroelectric liquid crystal cells that has recently been developed in the context of distributed optical sensing networks can also be used to realize fully monolithic, actively Q-switched waveguide lasers as well as actively mode-locked all-fiber lasers. Those cells enable the development of pulsed laser sources with the same level...
Optical frequency combs (OFCs) generated by quantum cascade lasers (QCLs) have recently been proven in the mid infrared [1] and they have already been applied to spectroscopy in free-running operation [2]. It is clear however that for more demanding applications such as high-resolution and accuracy spectroscopy and metrology the performance obtained in free-running operation is not enough, since a...
Compact, cost and energy efficient diode lasers which generate short infrared pulses in the picosecond (ps) and sub-ps ranges are ideal pulse sources for many applications like e.g. THz-TDS scanning systems [1]. Using a passively driven diode laser with a colliding-pulse mode-locking (CPM) contact layout pulses below 10 ps can be generated [2]. This design contains a cavity centred saturable absorber...
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