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A phase-matched output coupler is introduced and used to improve broadband modelocking of a Ti:sapphire laser with a tunable enhancement of >15dB at long wavelengths while maintaining a good beam profile.
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).
Measurement and modeling of single-walled carbon nanotubes (SWCNTs) based saturable absorber (SA) on stabilizing and shortening mode-locked fiber lasers are presented. The concentration and thickness effect of SWCNTs SA on stabilizing and shortening passive mode-locked pulse is investigated experimentally. Haus master equation is applied to simulate the pulse characteristics to understand the dynamic...
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.
Passively mode-locked lasers using saturable absorber incorporating dispersed single-wall carbon nanotubes (SWCNTs) is demonstrated. The peak absorption wavelength of saturable absorber can be engineered within the gain band-width of erbium-doped fiber (EDF) centered at 1550 nm. The mean diameter of SWCNTs and the linear optical absorption of SWCNTs-polyvinyl alcohol (PVA) film are verified by Raman...
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