High-power separate-confinement heterostructure AlGaAs/GaAs laser diodes with broadened waveguide

Dmitri Z. Garbuzov; Joseph H. Abeles; Nancy A. Morris; Peter D. Gardner; Alfred R. Triano; Maria G. Harvey; Dean B. Gilbert; John C. Connolly

doi:10.1117/12.237659

12 April 1996 High-power separate-confinement heterostructure AlGaAs/GaAs laser diodes with broadened waveguide

Dmitri Z. Garbuzov, Joseph H. Abeles, Nancy A. Morris, Peter D. Gardner, Alfred R. Triano, Maria G. Harvey, Dean B. Gilbert, John C. Connolly

Author Affiliations +

Proceedings Volume 2682, Laser Diodes and Applications II; (1996) https://doi.org/10.1117/12.237659
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

AlGaAs/GaAs graded-index separate-confinement heterostructure single quantum well (GRINSCH-SQW) lasers with different waveguide thickness have been analyzed experimentally and compared with results from modeling using transverse optical field distributions. We have found that for GRINSCH lasers the halfwidth of near-field and far-field patterns depends very weakly on the waveguide thickness due to the focusing of the optical field in the transverse direction by the graded-index waveguide. At the same time, the mode intensity in the cladding layers is reduced by two orders of magnitude as the waveguide thickness is increased from 40 nm to 1200 nm. As a result, a 20% improvement in the differential quantum efficiency ((eta) _d) is realized, while the threshold current density remains unchanged. Differential quantum efficiency as high as 78% and output power exceeding 4 W cw have been obtained for broadened waveguide lasers.

Citation Download Citation

Dmitri Z. Garbuzov, Joseph H. Abeles, Nancy A. Morris, Peter D. Gardner, Alfred R. Triano, Maria G. Harvey, Dean B. Gilbert, and John C. Connolly "High-power separate-confinement heterostructure AlGaAs/GaAs laser diodes with broadened waveguide", Proc. SPIE 2682, Laser Diodes and Applications II, (12 April 1996); https://doi.org/10.1117/12.237659

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available