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Proceedings Paper

Dual-wavelength distributed feedback laser for the generation of terahertz radiation
Author(s): Antti Laakso; Mihail Dumitrescu; Markus Pessa
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Paper Abstract

The use of terahertz radiation bears great potential for various applications. We propose a method for obtaining terahertz radiation based on frequency difference generation from two-longitudinal-mode emission of monolithic distributed feedback lasers with modulated gratings. The frequency separation of the two dominating longitudinal modes of the proposed device structure can cover a wide range and several structural and operation point parameters can be used for coarse- and fine-tuning. Moreover, the nearly perfect overlapping of the dominant modes' optical field transverse distributions is enabling high-efficiency terahertz generation. The paper presents design formulas, simulation results and discusses the influences of the fabrication inaccuracies on the target frequency separation.

Paper Details

Date Published: 4 August 2009
PDF: 9 pages
Proc. SPIE 7386, Photonics North 2009, 73862K (4 August 2009); doi: 10.1117/12.839628
Show Author Affiliations
Antti Laakso, Tampere Univ. of Technology (Finland)
Mihail Dumitrescu, Tampere Univ. of Technology (Finland)
Markus Pessa, Tampere Univ. of Technology (Finland)

Published in SPIE Proceedings Vol. 7386:
Photonics North 2009
Réal Vallée, Editor(s)

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