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Optical Engineering

Photonic crystal beamsplitting laser diode
Author(s): Michael T. Reilly; Wenli Huang; Faquir C. Jain
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Paper Abstract

A description of a novel Y-branch photonic crystal laser diode operating at 1.55 µm is presented. Optical gain calculations within an InGaAsP-InP multiple-quantum-well (MQW) gain medium predict a threshold current of 0.5 mA, which is lower than a typical ridge laser. The resonant structure of the beamsplitting laser is modeled using a scattering matrix approach incorporating the effects of multiple internal reflections on the cavity mode structure and mode spacing. Phase-matching conditions are derived, taking into account all the different resonant substructures. The results from the phase-matching analysis show an operating mode that reduces threshold current beyond that of a geometrically similar conventional ridge laser. This Y-branch photonic crystal laser, when cascaded as a multichannel resonant structure, produces numerous optical intensity levels that can be used in an optical analog-to-digital converter (ADC).

Paper Details

Date Published: 1 March 2006
PDF: 7 pages
Opt. Eng. 45(3) 034203 doi: 10.1117/1.2185497
Published in: Optical Engineering Volume 45, Issue 3
Show Author Affiliations
Michael T. Reilly, Ciencia, Inc. (United States)
Wenli Huang, U.S. Military Academy (United States)
Faquir C. Jain, Univ. of Connecticut (United States)

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