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Journals and Conferences
This paper reports on the recent progress in the design and fabrication of high-nonlinearity lead-silicate holey fibers (HFs). First, the fabrication of a fiber designed to offer close to the maximum possible nonlinearity per unit length in this glass type is described. A value of /spl gamma/=1860 W/sup -1//spl middot/km/sup -1/ at a wavelength of 1.55 /spl… (More)
We report the results of a systematic experimental and theoretical study of 1.06 /spl mu/m pumped supercontinuum generation in holey fibers with different flattened dispersion characteristics. We identify several different operating regimes characterised by the relative positions of the zero dispersion wavelengths.
In this paper, the properties of nonsilica glasses and the related technology for microstructured fiber fabrication are reviewed. Numerical simulation results are shown using the properties of nonsilica microstructured fibers for mid-infrared (mid-IR) supercontinuum generation when seeding with near-IR, 200-fs pump pulses. In particular, bismuth glass… (More)
We have demonstrated an ultra-short-pulse Yb/sup 3+/-fiber laser and amplifier system that produces >25 W average power. The output pulses were recompressed to a duration of 110 fs using a standard bulk grating-based compressor.
We demonstrate the production of a well depleted mid-IR continuum with a spectral range between ~0.9 - 2.5 mum using a tellurite wagon wheel microstructured fiber and a pump source at 1.5 mum.
This review summarises the methods available for the analysis of phytate and structurally related molecules, i.e., inositol polyphosphates. Phytate has been determined by colorimetry, low pressure ion exchange column chromatography, phosphorus-31 fourier transform nuclear magnetic resonance spectroscopy (31P FT NMR), near-infrared reflectance spectroscopy… (More)
We demonstrate threefold increased autocorrelation peak from an Yb-fiber CPA system operating with strong self-phase modulation by pre-shaping the pulse spectral-phase. The adaptive control loop used feedback from the output autocorrelation. High-quality 800 fs, 65 muJ recompressed pulses were produced.
We report the fabrication of lead silicate holey fibers with record nonlinearities of up to 1860 W/sup -1/m/sup -1/ at 1.55 /spl mu/m. Broadband supercontinuum generation is obtained in a dispersion optimized fiber variant at /spl sim/100 pJ pulse energies for 1.06 /spl mu/m pumping.
Gain-switching of semiconductor laser diodes provides a practical and potentially low cost means of generating picosecond optical pulses. In this paper we describe the use of a highly dispersive chirped fiber Bragg grating (CFBG) to perform the pulse compression resulting in a very compact and attractive ps (1 GHz, 16 ps) pulse source.
We review the rapid recent progress in the development of short pulse high-power fiber laser and amplifier devices. Use of cladding pump technology now provides a route to compact and efficient laser and amplifier systems with high beam quality and high output powers. A new Yb-fiber CPA system incorporating a CFBG stretcher with both 2nd and 3rd order… (More)