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Spectral characteristics of vertical-cavity surface-emitting lasers with strong external optical feedback

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3 Author(s)
Jiang, Shijun ; Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA ; Dagenais, M. ; Morgan, R.A.

We study the spectral optical properties of vertical-cavity surface-emitting lasers (VCSEL's) in the presence of strong optical feedback from an external reflecting surface. When the feedback strength exceeds 1%, multicompound-cavity-longitudinal-modes are observed. The output spectral width increases significantly as the feedback increases. Besides the normal compound-cavity modes, high-loss compound-cavity modes are also observed for the first time. The experimental observations are well explained by a compound-cavity laser theory.<>

Published in:
Photonics Technology Letters, IEEE  (Volume:7 ,  Issue: 7 )

Date of Publication: July 1995

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