Arun K. Sridharan

TL;DR: This analysis shows that if the fiber's MFD could be increased arbitrarily, 36 kW of power could be obtained with diffraction-limited quality from a fiber laser or amplifier, but limits to the scaling of the MFD may restrict fiber lasers to lower output powers.

TL;DR: In this paper, a formalism for analyzing the power scaling of diffraction limited fiber lasers and amplifiers is applied to a wider range of materials, including silica doped with Tm and Er, YAG and YAG based ceramics and Yb doped phosphate glass.

TL;DR: A novel technique for suppression of parasitic oscillations using claddings on slab edges that significantly increases g(0)l to 11.63 and increases the single-pass extracted power in a power amplifier by 50%.

TL;DR: Propagation of a higher-order mode in a rectangular-core fiber allows for better thermal management and bend-loss immunity than conventional circular-core fibers, extending the power-handling capabilities of optical fibers.

TL;DR: In this paper, a mid-infrared quantum cascade laser absorption sensor was developed for in-situ detection of NO2 in high-temperature gas environments, where a cluster of spin-split transitions near 1599.9 cm−1 from the ν3 absorption band was selected due to the strength of these transitions and low spectral interference from water vapor within this region.