A fiber laser using a thulium-doped ZBLAN gain medium was used to generate laser radiation simultaneously at 1461, 1505 and 1874 nm, with > 5 mW output power at each of the wavelengths. The laser was used to quantify the near-infrared absorption of liquid water in acetone. Additionally, near-infrared spectra were recorded using a broad band source and were interpreted using parallel factor (PAR...

Heterodyne experiments have been performed in the middle infrared using the CO2 laser in conjunction with photoconductive Ge:Cu and photovoltaic Pb1-xSnxSe detectors. The observed minimum detectable power is a factor of five to 25 greater than that for the theoretically perfect quantum counter. The technique should prove useful for infrared communications, radar, and heterodyne spectroscopy. [T...

I briefly review three topics of recent interest concerning power corrections, renor-malons and Sudakov resummation: (a) 1/Q corrections to event shape observables in e + e − annihilation, (b) power corrections in Drell-Yan production and (c) facto-rial divergences that arise in resummation of large infrared (Sudakov) logarithms in moment or 'real' space.

We report the design of an all-fiber continuous wave Short-Wave Infrared source capable to output up to 700 mW of power at 1940 nm. The source is tunable over wavelength intervals comprised between 1850 nm and 2070 nm depending on its configuration. The output can be single or multimode while the optical signal to noise ratio ranges from 25 and 40 dB. The architecture is based on the integrated...

The motivation behind this work is to show that InP-based intersubband lasers with high power can be realized on substrates significant lattice mismatch. This a primary concern for the integration of mid-infrared active optoelectronic devices low-cost photonic platforms, such as Si. As evidence, an quantum cascade laser structure was grown GaAs substrate, which has large (4%) mismatch respect I...

In order to make precise measurements of laser frequencies in the infrared region, it is generally necessary to run a laser cw at a low power level. This is done to insure frequency stability that is very hard to obtain in high-power, Q-switched lasers. Microwave techniques such as heterodyning can be used for extremely accurate measurements of absolute laser frequencies, provided a radiation d...

A compact mid-infrared channel waveguide laser is demonstrated in Cr:ZnS with a view to power scaling chromium laser technology utilizing the thermo-mechanical advantages of Cr:ZnS over alternative transition metal doped II-VI semiconductor laser materials. The laser provided a maximum power of 101 mW of CW output at 2333 nm limited only by the available pump power. A maximum slope efficiency o...

We experimentally investigate the noise properties of picosecond supercontinuum spectra generated at different power levels in uniform and tapered photonic crystal fibers. We show that the noise at the spectral edges of the generated supercontinuum is at a constant level independent on the pump power in both tapered and uniform fibers. At high input power the spectral bandwidth is limited by th...