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Surface-emitting circular DFB, disk-, and ring-Bragg resonator lasers with chirped gratings. II: nonuniform pumping and far-field patterns

Sun, Xiankai and Yariv, Amnon (2009) Surface-emitting circular DFB, disk-, and ring-Bragg resonator lasers with chirped gratings. II: nonuniform pumping and far-field patterns. Optics Express, 17 (1). pp. 1-6. ISSN 1094-4087. doi:10.1364/OE.17.000001.

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This is a continuation of our previous work [Opt. Express 16, 9155 (2008)]. In this paper we investigate the effect of nonuniform pumping on the modal properties of surface-emitting chirped circular grating lasers. By numerically solving the coupled-mode equations and matching the boundaries we compare and discuss the threshold pump levels and frequency detuning factors for three pumping profiles: uniform, Gaussian, and annular. Depending on the overlap of the pumping and modal profiles, Gaussian pumping results in the lowest threshold pump levels except for the fundamental mode of ring Bragg resonator laser, and annular pumping provides larger threshold discrimination between the fundamental and first-order modes of circular DFB and ring Bragg resonator lasers, which is favorable for single-mode operation in these lasers. We also study the far-field patterns of the fundamental modes of circular DFB, disk-, and ring- Bragg resonator lasers. Circular DFB and ring Bragg resonator lasers have the first-order dominating peak, while disk Bragg resonator laser exhibits the zeroth-order dominating peak.

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Additional Information:©2008 Optical Society of America. Received 7 Nov 2008; revised 18 Dec 2008; accepted 18 Dec 2008; published 22 Dec 2008. This work was supported in part by the Defense Advanced Research Projects Agency (DARPA) and in part by the National Science Foundation. X. Sun is grateful to Dr. P. Chak for his kind help in numerical calculations. OCIS codes: (250.7270) Vertical emitting lasers; (140.5560) Pumping; (130.2790) Guided waves; (230.1480) Bragg reflectors; (050.2770) Gratings; (140.5960) Semiconductor lasers; (130.0130) Integrated optics.
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Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Subject Keywords:semiconductor-lasers; modal properties; threshold; design
Issue or Number:1
Record Number:CaltechAUTHORS:20090421-134634302
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14039
Deposited By: Tony Diaz
Deposited On:22 Apr 2009 22:37
Last Modified:08 Nov 2021 22:42

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