Comparison of linewidth enhancement factor for compressively strained AlGaInAs and InGaAsP quantum well lasers

Durga Prasad Sapkota; Madhu Sudan Kayastha; Koichi Wakita

doi:10.1117/12.909851

28 February 2012 Comparison of linewidth enhancement factor for compressively strained AlGaInAs and InGaAsP quantum well lasers

Durga Prasad Sapkota, Madhu Sudan Kayastha, Koichi Wakita

Author Affiliations +

Proceedings Volume 8255, Physics and Simulation of Optoelectronic Devices XX; 825513 (2012) https://doi.org/10.1117/12.909851
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

We have compared and analyzed the theoretical possibility for the extreme reduction in the linewidth enhancement (α- factor) in strained layer quantum-well (QW) lasers for AlGaInAs and InGaAsP material. Valence band structure and optical gain in both types of QWs under compressive strain have been calculated using 4×4 Luttinger-Kohn Hamiltonian. The Luttinger parameters of these quaternary materials were determined from the linear interpolation between the values of their respective binaries. The α-factor has been calculated as the ratio of the carrier induced change in real component of the complex refractive index to that in imaginary component of the refractive index. We have used Kramers-Kronig relations to calculate the refractive index change due to carrier induced. The α-factor was up to 1.5 times smaller in AlGaInAs QW than in InGaAsP QW lasers. The material modal differential gain is found to be approximately 1.38 times larger and material carrier induced refractive index change is 1.16 times smaller in the former material than the latter, respectively.

Citation Download Citation

Durga Prasad Sapkota, Madhu Sudan Kayastha, and Koichi Wakita "Comparison of linewidth enhancement factor for compressively strained AlGaInAs and InGaAsP quantum well lasers", Proc. SPIE 8255, Physics and Simulation of Optoelectronic Devices XX, 825513 (28 February 2012); https://doi.org/10.1117/12.909851

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