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Amplification by Innoslab amplifiers has been applied to ultrafast laser pulses for many years. Recent progress in high power laser diodes and a new pumping scheme made application of ytterbium doped laser crystals which support subpicosecond pulse durations possible. Ultrashort pulse experiments were carried out with a Yb:KYW fs-oscillator (HighQ Laser Innovation GmbH).To enable shorter pulse lengths...
A novel configuration for a Brillouin distributed fiber sensor based on Brillouin optical time-domain analysis is proposed. This configuration eliminates many intensity noise issues found in previous schemes. Resolution of 7 m all over a 47 km single-mode fiber was achieved and resolution down to 30 cm in a few kilometer fiber. Noise reduction makes possible measurements with a 16 times averaging.
Optical communication systems based on dense wavelength division multiplexing (DWDM) would benefit from the ability to adjust the operating wavelength of a laser transmitter. Previous attempts, including thermal adjustment, etalon based wavelength locking, and various types of optical frequency and phase locked loops such as the Pound-Drever-Hall technique suffer from weaknesses including sensitivity...
Ultrafast electron dynamics in quasi-one-dimensional NbSe3 conductors was investigated by means of two-color pump-probe reflectivity measurements. The results clearly demonstrate the resonant probing of the charge-density-wave phases with different transition properties.
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