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A femtosecond thulium-doped passively modelocked fiber laser with internal dispersion compensation is presented. It generates pulses at a center wavelength of 1985 nm with a dechirped pulse duration of 320 fs and an energy of 3.5 nJ. Pulsed operation is achieved using additive pulse mode locking, dispersion compensation is facilitated by an internal grating arrangement.
We report an optical parametric chirped-pulse amplification (OPCPA) system with the pulse duration of 5.5 fs at a 1-kHz repetition rate, pumped by a 450-nm pulse from a frequency doubled Ti:sapphire laser.
We report experimental and numerical results on the pulse dynamic of passively modelocked Yb-doped fiber laser operating in the chirped-pulse regime. A newly design cavity with a CFBG provides positive dispersion with negligible nonlinearity.
A new modelocking regime governed by the Ginzburg-Landau equation is demonstrated in an anomalous dispersion fiber laser. Output pulses are long, flat-topped, and highly-down-chirped, with energies above 150 nJ and repetition rates below 300 kHz.
We report on a passively mode-locked erbium fiber laser operating in a highly-positive dispersion regime. Highly-chirped pulses with 5.4 ps duration and 8 nm spectral bandwidth are generated. They are compressed down to 757 fs.
640 GHz chirped beat waves are recorded on a real-time scope and 2.2 ps pulses are recorded on a single-shot streak camera with 1000:1 dynamic range after -30times time magnification.
Tunable and multi-wavelength mode-locked operation of a fiber laser is demonstrated. A loop mirror with highly nonlinear fiber is used as an all-optical modulator; tuning is achieved through dispersive gratings and a tunable optical delay.
An XCPO generates stretched pulses > 10 ns at a 33 MHz repetition rate from semiconductor mode-locked laser. The spectral bandwidth is scalable depending on the group delay of CFBG and the pulse repetition rate.
We demonstrate a novel technique for locking and tuning of a near-degenerate OPO using a transversely chirped Bragg grating. The signal tuning range was 997-1016 nm and the maximum signal energy was 0.7 mJ.
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