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Evaluation scheme for the design of power-optimized single mode vertical-cavity surface-emitting lasers

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Abstract

A very simple and efficient evaluation procedure is suggested for the design of power-optimized single mode VCSELs by reviewing the physical mechanisms that governs mode transition and simplifying the computation steps. In addition, the new structures are proposed and tested following the suggested evaluation procedure. As a result, the proposed design exhibits much better stability of the fundamental mode over a current range wider than the conventional one.

©2004 Optical Society of America

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Figures (4)

Fig. 1.
Fig. 1. Temperature rise versus the radius of the current aperture.
Fig. 2.
Fig. 2. Two designs for high power single mode VCSELs. The plots at the bottom represent the refractive index profiles of the respective structures. Parts a and b in (b) are an index guiding disc and absorption region.
Fig. 3.
Fig. 3. Modal gains of structure A as a function of the index change at the center.
Fig. 4.
Fig. 4. Modal losses of structure B as a function of index change at the center..

Tables (1)

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Table 1. Thermal conductivity used in calculation

Equations (1)

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1 r d dr ( r dR dr ) + [ ω 2 ε ( r ) μ 0 β 2 m 2 r 2 ] R = 0 .
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