Two Photon Induced Lasing in 1550 nm Quantum Dash Optical Gain Media

Amir Capua, Abigael Saal, Johann Peter Reithmaier, Kresten Yvind, Gad Eisenstein

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We report on a unique lasing mechanism observed in quantum dash Gain media. While the gain media is electrically pumped below lasing threshold, a strong optical pulse excites carriers by two photon absorption into high energy states of the quantum dashes and wetting layer. Fast inter band carrier relaxation and capture processes into the ground states of the quantum dashes result in increased gain followed by lasing at the gain peak irrespective of the stimulating pulse wavelength. The temporal response of the lasing line is examined on a 40 GHz scope and full characterization of the pulse by the XFROG scheme is performed. We show the lasing mechanism to be governed mainly by the wetting layer dynamics and extract a direct measurement of the carrier-carrier scattering time constant.
Original languageEnglish
Title of host publicationProceedings of the European Conference on Optical Communication (ECOC) 2011
PublisherOptical Society of America
Publication date2011
ISBN (Print)978-1-4577-1918-9
Publication statusPublished - 2011
Event37th European Conference and Exhibition on Optical Communication - Geneva, Switzerland
Duration: 18 Sep 201122 Sep 2011
Conference number: 37


Conference37th European Conference and Exhibition on Optical Communication
Internet address

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