A self-aligning fabrication process is presented for enhancing the fundamental singlemode emission of selectively oxidised vertical cavity surface emitting lasers using a surface relief etching technique. The mechanism underlying the increase in threshold gain due to the use of a shallow surface relief is described and the results obtained for a 7 μm device at 850 nm are presented
Published in:
Electronics Letters
(Volume:35
,
Issue:
16
)
Date of Publication: 5 Aug 1999