Ultra-narrow (sub-MHz) linewidth emission from discrete mode laser diodes
Guignard, Celine and Patchell, J. and Jones, D. and Kelly, Brian and Barry, Liam P. and Besnard, P. and O'Gorman, J. (2007) Ultra-narrow (sub-MHz) linewidth emission from discrete mode laser diodes. In: CLEOE-IQEC 2007 - European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 17-22 June 2007, Munich, Germany.
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A class of laser which exhibits ultra-narrow sub MHz linewidth emission necessary for numerous applications in optical communications and sensors is described. The spectral performance of commercial discrete mode (DM) and distributed feedback (DFB) lasers is compared. The devices used in this work are asymmetrically coated ridge waveguide Fabry Perot lasers which incorporated etched slot features and emitting around lambda = 1.55 mum. The active region of the devices consisted of a strained compensated InAlGaAs MQW structure.
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