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A system based on phase-sensitive optical time domain reflectometry is proposed for simultaneously strain and vibration sensing. The strain of fiber is detected by comparing the patterns of signal for different laser frequencies, and the vibration of fiber is detected simultaneously from the signals for any certain laser frequency. During the measurement, frequencies of the probe optical pulses are...
We demonstrate a graphene based saturable absorber mode-locked Nd:YVO4 solid-state laser, generating ∼14nJ pulses with ∼1W average output power. This shows the potential for high-power pulse generation.
We demonstrate strongly chirped pulses from mode-locked Yb fibre ring lasers with cavity lengths exceeding 1 km, in the presence of very high net normal dispersion. Mode-locking was achieved using a single wall carbon nanotube saturable absorber. In the experiments reported here, no intentional spectral filtering was employed, despite the all-normally dispersive cavity. The lasing wavelength selection...
We demonstrate an ultrafast stretched-pulse fiber laser mode-locked by a carbon nanotube based saturable absorber. 123 fs pulses at 1.56 mum are generated with an output spectral width of 32 nm.
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