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Proceedings Paper

Discrete mode lasers for communications applications
Author(s): L. P. Barry; C. Herbert; D. Jones; A. Kaszubowska-Anandarajah; B. Kelly; J. O'Carroll; R. Phelan; P. Anandarajah; K. Shi; J. O'Gorman
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Paper Abstract

The wavelength spectra of ridge waveguide Fabry Perot lasers can be modified by perturbing the effective refractive index of the guided mode along very small sections of the laser cavity. One way of locally perturbing the effective index of the lasing mode is by etching features into the ridge waveguide such that each feature has a small overlap with the transverse field profile of the unperturbed mode, consequently most of the light in the laser cavity is unaffected by these perturbations. A proportion of the propagating light is however reflected at the boundaries between the perturbed and the unperturbed sections. Suitable positioning of these interfaces allows the mirror loss spectrum of a Fabry Perot laser to be manipulated. In order to achieve single longitudinal mode emission, the mirror loss of a specified mode must be reduced below that of the other cavity modes. Here we review the latest results obtained from devices containing such features. These results clearly demonstrate that these devices exceed the specifications required for a number of FTTH and Datacomms applications, such as GEPON, LX4 and CWDM. As well as this we will also present initial results on the linewidth of these devices.

Paper Details

Date Published: 3 February 2009
PDF: 12 pages
Proc. SPIE 7230, Novel In-Plane Semiconductor Lasers VIII, 72300N (3 February 2009); doi: 10.1117/12.810811
Show Author Affiliations
L. P. Barry, Dublin City Univ. (Ireland)
C. Herbert, Eblana Photonics, Ltd. (Ireland)
D. Jones, Eblana Photonics, Ltd. (Ireland)
A. Kaszubowska-Anandarajah, Dublin City Univ. (Ireland)
B. Kelly, Eblana Photonics, Ltd. (Ireland)
J. O'Carroll, Dublin City Univ. (Ireland)
Eblana Photonics, Ltd. (Ireland)
R. Phelan, Eblana Photonics, Ltd. (Ireland)
P. Anandarajah, Dublin City Univ. (Ireland)
K. Shi, Dublin City Univ. (Ireland)
J. O'Gorman, Eblana Photonics, Ltd. (Ireland)

Published in SPIE Proceedings Vol. 7230:
Novel In-Plane Semiconductor Lasers VIII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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