Cold-cavity measurement of excess optical loss in oxide-confined vertical cavity surface emitting lasers

vertical cavity surface emitting laser;semiconductor laser;optical loss;microcavity laser;laser

Fryslie, Stewart ; Choquette ; Kent D.

关键词: vertical cavity surface emitting laser;    semiconductor laser;    optical loss;    microcavity laser;    laser;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/46646/Stewart_Fryslie.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Microcavity laser design and performance optimization requires a quantitative knowledge of the cavity optical losses. A generalized method using sub-threshold spectral measurements matched to model calculations is demonstrated to determine optical loss in microcavity lasers. Cold-cavity spectral characteristics are used to extract the size dependent optical loss for small diameter oxide-confined vertical cavity surface emitting lasers. For oxide aperture diameters less than 4 !m, the oxide scattering loss can be greater than 10 cm-1, similar to the typical values of free carrier absorption loss.