Referenced Items are not available for this document.
For pt.I see ibid., vol.37, no.3, p.353-64 (2001). We examine the impact of device design parameters and nonuniform gain profiles on the modes of a weakly guiding, second-order concentric-circle-grating distributed feedback laser, including the effects of radiation loss. The analysis uses near-threshold coupled-mode equations that are valid for any grating shape, and any depth for which the undepleted-bound-mode approximation is accurate. We solve these equations numerically and examine the effects of several device parameters, including coupling strengths and grating duty cycle, on mode frequencies and gain thresholds for low- and high-order radial and azimuthal modes. We further compare uniform, Gaussian, and annular optical pump-beam profiles. We find that device and pump-beam parameters can have a significant effect on the threshold gains of the laser, as well as an the azimuthal mode discrimination and total lasing linewidth it exhibits
Published in:
Quantum Electronics, IEEE Journal of
(Volume:37
,
Issue:
3
)
Date of Publication: Mar 2001
- Page(s):
- 365 - 371
- ISSN :
- 0018-9197
- INSPEC Accession Number:
- 6883736
- Digital Object Identifier :
- 10.1109/3.910444
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 07 August 2002
- Issue Date :
- Mar 2001
- Sponsored by :
- IEEE Photonics Society
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