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Factors influencing brightness and beam quality of conventional and distributed Bragg reflector tapered laser diodes in absence of self-heating

Kaunga-Nyirenda, Simeon Newton; Bull, Stephen; Lim, Jun Jun; Hasler, Karl-Heinz; Fricke, Jörg; Larkins, Eric C.

Authors

Simeon Newton Kaunga-Nyirenda

Jun Jun Lim

Karl-Heinz Hasler

Jörg Fricke

Eric C. Larkins



Abstract

In this study, the authors examine some of the factors affecting the brightness and the beam quality of high-power tapered lasers. The large volume resonators required to achieve a high-power, high-brightness operation make the beam quality sensitive to carrier lensing and a multimode operation. These cause bleaching of the regions outside the ridge waveguide. The beam quality in the conventional and the distributed Bragg reflector tapered lasers is examined in the absence of the self-heating effects to investigate the effect of the carrier lensing effects. The influence of the front facet reflectivity and the taper angle on the beam quality is investigated. The beam quality was found to degrade with an increase in the front facet reflectivity and for the larger taper angles in the conventional tapered lasers, especially at low ridge waveguide currents. Finally, the performance of the conventional tapered lasers employing a beamspoiler was assessed. The beam quality was found to be comparable with that achieved in the DBR tapered lasers.

Citation

Kaunga-Nyirenda, S. N., Bull, S., Lim, J. J., Hasler, K., Fricke, J., & Larkins, E. C. (2014). Factors influencing brightness and beam quality of conventional and distributed Bragg reflector tapered laser diodes in absence of self-heating. IET Optoelectronics, 8(2), https://doi.org/10.1049/iet-opt.2013.0082

Journal Article Type Article
Acceptance Date Jan 2, 2014
Online Publication Date Feb 24, 2014
Publication Date Apr 4, 2014
Deposit Date Jul 27, 2016
Publicly Available Date Jul 27, 2016
Journal IET Optoelectronics
Electronic ISSN 1751-8768
Publisher Institution of Engineering and Technology
Peer Reviewed Peer Reviewed
Volume 8
Issue 2
DOI https://doi.org/10.1049/iet-opt.2013.0082
Public URL http://eprints.nottingham.ac.uk/id/eprint/35472
Publisher URL http://digital-library.theiet.org/content/journals/10.1049/iet-opt.2013.0082
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This paper is a postprint of a paper submitted to and accepted for publication in IET Optoelectronics and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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