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Proceedings Paper

Tunable multisection Fabry-Perot laser
Author(s): Lalitha Ponnampalam; Richard G. S. Plumb; S. Naseem
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Paper Abstract

A simple tunable laser structure with quasi-continuous tuning range of 15 nm, more than 30 dB side mode suppression ratio, 400 kHz linewidth and low variation in output power over the tuning range is demonstrated. The device involved minor modifications to a standard Fabry Perot (FP) laser and measurements have confirmed modeled predictions. Prototype fabrication has used focussed ion beam etching to generate three reflection/scattering sites with power reflectivity of approximately 1%, at precise locations along the optical axis of a 1500 nm FP laser. The device contact was electrically split at these reflection/scattering sites, thereby generating weak FP cavities within a strong primary FP cavity. Tuning is achieved by precisely changing the currents to each section and hence altering the refractive indices.

Paper Details

Date Published: 6 June 2001
PDF: 9 pages
Proc. SPIE 4287, In-Plane Semiconductor Lasers V, (6 June 2001); doi: 10.1117/12.429795
Show Author Affiliations
Lalitha Ponnampalam, Univ. of Cambridge (United Kingdom)
Richard G. S. Plumb, Univ. of Cambridge (United Kingdom)
S. Naseem, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 4287:
In-Plane Semiconductor Lasers V
Luke J. Mawst; Ramon U. Martinelli, Editor(s)

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