Design strategies to increase the brightness of gain guided tapered lasers |
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| Authors: | Luis Borruel Helena Odriozola José M G Tijero Ignacio Esquivias Slawomir Sujecki Eric C Larkins |
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| Institution: | 1. E. T. S. I. Telecomunicación, Univ. Politécnica de Madrid, Ciudad Universitaria s/n, Madrid, 28040, Spain
2. School of Electrical and Electronic Engineering, University of Nottingham, Nottingham, NG7 2RD, UK
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| Abstract: | The basic operating principles of gain guided tapered lasers are studied in detail by means of numerical simulations. The carrier induced lensing effect caused by spatial hole burning is described as the main mechanism limiting the device performance. The influence of the following design parameters in the maximum output power and beam brightness is analyzed: refractive index step of the ridge waveguide section, angle and length of the tapered section, and the use of beam spoilers. The results provide design guidelines for improving the device performance. |
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