A square-shaped flattop mode was experimentally demonstrated in a broad-area circular-aperture VCSEL using an external-cavity aspheric mirror. The mirror was fabricated by electron-beam lithography on a curved substrate. Excellent single-mode operation was observed.
© 2004 Optical Society of America
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3300) Lasers and laser optics : Laser beam shaping
(250.0250) Optoelectronics : Optoelectronics
(250.7260) Optoelectronics : Vertical cavity surface emitting lasers
Z. H. Yang and J. R. Leger, "Flattop mode shaping of a vertical cavity surface emitting laser using an external-cavity aspheric mirror," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2004), paper CTuR5.
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