Optical mode discrimination in vertical-cavity surface-emitting lasers that contain distributed Bragg reflectors (DBRs) and a spatially limited gain medium is analyzed numerically. It is assumed that the output field is linearly polarized owing to gain selectivity. The analysis employs a three-dimensional model and an angular spectrum of plane-wave decomposition with the proper polarizations. Two types of round aperture are considered, namely, a Gaussian aperture and a ring-peak aperture that represents gain saturation. Coupled with the DBRs, the former aperture yields nearly Laguerre–Gaussian modes, whereas the latter aperture significantly distorts the mode shapes. In both cases, narrowband DBRs provide the best mode discrimination.
© 2005 Optical Society of America
Original Manuscript: October 4, 2004
Revised Manuscript: December 13, 2004
Manuscript Accepted: January 4, 2005
Published: May 10, 2005
Martin Achtenhagen, Amos Hardy, and Eli Kapon, "Three-dimensional analysis of mode discrimination in vertical-cavity surface-emitting lasers," Appl. Opt. 44, 2832-2838 (2005)