Far-field behaviour of 980 nm broad area lasers incorporating bandgap widened extended slab waveguides

McIlvaney, K., Carson, J., Bryce, A.C., Marsh, J.H. and Nicklin, R. (1995) Far-field behaviour of 980 nm broad area lasers incorporating bandgap widened extended slab waveguides. Electronics Letters, 31(7), pp. 553-554. (doi: 10.1049/el:19950372)

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Abstract

The far-field pattern of a broad area laser has been improved by placing passive, low-loss slab waveguides on either side of the active region. Two types of laser were investigated: first, control devices (75 mu m*300-500 mu m) with threshold currents of 200-250 mA and a broad far-field spectrum (10 degrees ) exhibiting several peaks; secondly, lasers with passive slab waveguides on both sides of the active region which exhibited a single peak in the far-field spectrum, the divergence of which decreased as the length of the passive sections was increased. The threshold current increased with increasing length of passive section, being typically 300 mA when the total length of the passive regions was 400 mu m.

Item Type:Articles
Additional Information:This work was supported under the DTI-SERC Optoelectronics Systems LINK programme ‘Practical Optical Pump Sources’ IED 2/430/30/005.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Marsh, Professor John
Authors: McIlvaney, K., Carson, J., Bryce, A.C., Marsh, J.H., and Nicklin, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Electronics Letters
Publisher:Institution of Engineering & Technology
ISSN:0013-5194
ISSN (Online):1350-911X

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