Surface-emitting circular DFB, disk-, and ring-Bragg resonator lasers with chirped gratings. II: nonuniform pumping and far-field patterns
- Creators
- Sun, Xiankai
- Yariv, Amnon
Abstract
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.
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.Attached Files
Published - Sun2009p842.pdf
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Additional details
- Eprint ID
- 14039
- Resolver ID
- CaltechAUTHORS:20090421-134634302
- Defense Advanced Research Projects Agency (DARPA)
- NSF
- Created
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2009-04-22Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field