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We present a detailed investigation of Kerr-lens mode-locking in diode-pumped Cr:LiSAF lasers employing gain-matched output couplers (GMOCs). Single-mode diodes (660 nm, 130 mW) and tapered diodes (685 nm, 1 W) were investigated as diode pump sources. We have shown that, by reducing the gain-filtering effect, GMOC enhances the effective self-amplitude modulation depth and provides a significant improvement...
We report efficient and robust Kerr-lens mode-locking of single-mode and tapered diode-pumped Cr:LiSAF lasers by using gain-matched output couplers. Sub-15-fs pulses were generated with peak powers above 60-kW and optical-to-optical conversion efficiencies up to 21%.
We study supercontinuum generation using numerical simulations of the nonlinear propagation along hollow-core fibers at different pump wavelengths ranging from 400 nm to 2 μm. A general hollow fiber compressor design strategy is presented.
We demonstrate (both theoretically and experimentally) that fiber-optic Cherenkov radiation in the few-cycle regime exhibits three unique features absent when pumped with long pulses: continuum generation, high conversion-efficiency (up to 40%), and broad bandwidth (70-nm).
The dependence of Cherenkov radiation on pump pulse parameters is investigated. Based on this effect a tunable, highly efficient (>40%), broadband (>50 nm), green-orange light source is demonstrated with a threshold energy less than 100pJ.
Broadband laser mode-locking is demonstrated at greatly reduced modelocking strength with an output coupler that compensates for gain filtering. The concept is demonstrated with a >8 fs Ti:sapphire laser showing dramatically improved stability and beam quality.
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