Surface-emitting circular DFB, disk-, and ring-Bragg resonator lasers with chirped gratings. III: gain saturation effects and above-threshold analysis
- Creators
- Sun, Xiankai
- Yariv, Amnon
Abstract
As Part III of this series, this paper focuses on an above-threshold modal analysis which includes gain saturation effects in the surface-emitting chirped circular grating lasers. We derive an exact energy relation which states that, in steady state, the net power generated in the gain medium is equal to the sum of peripheral leakage power and vertical emission power. This relation is particularly useful in checking the accuracy of numerical mode solving. Numerical simulations demonstrate the dependence of required pump level on the vertical emission power and compare the laser threshold and energy conversion efficiency under uniform, Gaussian, and annular pump profiles. A larger overlap between the pump profile and modal intensity distribution leads to a lower threshold and a higher energy conversion efficiency. Finally the dependence of required pump level on device sizes offers us new design guidelines of these lasers for single-mode, high-efficiency, high-power applications.
Additional Information
© 2009 Optical Society of America. Received 23 Apr 2009; revised 17 May 2009; accepted 22 May 2009; published 1 Jun 2009. This work was supported in part by the Defense Advanced Research Projects Agency (DARPA) and in part by the National Science Foundation. 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 - Sun2009p4565Opt_Express.pdf
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Additional details
- Eprint ID
- 14782
- Resolver ID
- CaltechAUTHORS:20090804-092452952
- Defense Advanced Research Projects Agency (DARPA)
- NSF
- Created
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2009-08-06Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field