Chalcogenide samples with varying selenium concentrations, As₁₀Se₉₀, As₃₀Se₇₀, As₄₀Se₆₀, and As₅₀Se₅₀, were characterized for high power transmission using a Tm:fiber laser system. The Tm:fiber laser oscillator consists of a LMA fiber with 25/400 μm core/cladding diameters pumped by 793 nm diode. The output beam was collimated to a 3 mm beam diameter, and transmitted through the chalcogenide samples at CW powers up to 23 W. We measure the transmission as a function of incident power, as well as some initial characterization of surface damage from nanosecond pulses at 2 μm. Furthermore, we utilize a wavefront sensor to characterized the thermal lens induced by the Tm:fiber laser.

Date Published: 6 February 2012
PDF: 5 pages
Proc. SPIE 8239, High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications, 82390A (6 February 2012);

Published in SPIE Proceedings Vol. 8239:
High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications
Eckhard Beyer; Timothy Morris, Editor(s)