Mr. Abhinay Sandupatla Profile

Abhinay Sandupatla

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SPIE Journal Paper | 24 December 2015

Semiconductor cylinder fiber laser

Abhinay Sandupatla, James Flattery, Philipp Kornreich

OE, Vol. 54, Issue 12, 126113, (December 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.12.126113

KEYWORDS: Semiconductors, Glasses, Fiber lasers, Tellurium, Mirrors, Aluminum, Semiconductor lasers, Cladding, Quantum wells, Crystals

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We fabricated a fiber laser that uses a thin semiconductor layer surrounding the glass core as the gain medium. This is a completely new type of laser. The In2Te3 semiconductor layer is about 15-nm thick. The fiber laser has a core diameter of 14.2 μm, an outside diameter of 126 μm, and it is 25-mm long. The laser mirrors consist of a thick vacuum-deposited aluminum layer at one end and a thin semitransparent aluminum layer deposited at the other end of the fiber. The laser is pumped from the side with either light from a halogen tungsten incandescent lamp or a blue light emitting diode flash light. Both the In2Te3 gain medium and the aluminum mirrors have a wide bandwidth. Therefore, the output spectrum consists of a pedestal from a wavelength of about 454 to 623 nm with several peaks. There is a main peak at 545 nm. The main peak has an amplitude of 16.5 dB above the noise level of −73 dB.

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