Coupled-stripe in-phase operation of planar native-oxide index-guided AlyGa1−yAs-GaAs-InxGa1−xAs quantum-well heterostructure laser arrays

Kish, F. A., Caracci, S. J., Holonyak, N., Gavrilovic, P., Meehan, K. and Williams, J. E. (1992) Coupled-stripe in-phase operation of planar native-oxide index-guided AlyGa1−yAs-GaAs-InxGa1−xAs quantum-well heterostructure laser arrays. Applied Physics Letters, 60(1), 71. (doi: 10.1063/1.107378)

Abstract

High‐performance, coupled‐stripe, planar, index‐guided Al y Ga1−y As‐GaAs‐In x Ga1−x As quantum‐well heterostructure (QWH) laser arrays are fabricated by the formation of a relatively thick, current‐blocking, native oxide from the high‐gap Al y Ga1−y As upper confining layer between active stripes. Precise control of the thickness of the native oxide layer between emitters provides a means of varying the index step between stripes, and permits tailoring of the optical profile to produce in‐phase operation. The 10‐stripe coupled QWH laser arrays (∼3‐μm‐wide stripes on 4 μm centers) exhibit near‐diffraction‐limited, single‐lobed, far‐field patterns with low continuous (cw) thresholds (∼45 mA) and cw output powers (total external differential quantum efficiency ≳50%) of over 100 mW per uncoated facet.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Meehan, Professor Kathleen
• Authors: Kish, F. A., Caracci, S. J., Holonyak, N., Gavrilovic, P., Meehan, K., and Williams, J. E.
• College/School: College of Science and Engineering > School of Engineering
• Journal Name: Applied Physics Letters
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• ISSN (Online): 1077-3118