Far-field patterns of Quantum Well, Quantum Dash, and Quantum Dot Laser Diodes

Author

Ding, Y.H. ; Tan, C.L. ; Hongpinyo, V. ; Dimas, C.E. ; Wang, Y. ; Chen, C. ; Djie, H.S. ; Ooi, B.S.

Author_Institution

Comput. Eng. Dept., Lehigh Univ., Bethlehem, PA

fYear

2008

fDate

8-11 Dec. 2008

Firstpage

1

Lastpage

3

Abstract

We perform measurements of far field pattern of various quantum-confined heterostructures namely quantum well (QW), quantum dash (Qdash), and quantum dot (Qdot) lasers to study the effect of different active gain mediums of semiconductor lasers on the optical beam quality and coupling efficiency. The beam pattern profile of the Qdash laser is similar to that of the QW laser (FWHM ~ 20deg) while Qdot laser shows smaller divergence (FWHM ~ 5deg) and retain its intensity profile of single lobe Gaussian-shape at current injection up to two and half times threshold current.

Keywords

Gaussian distribution; optical couplers; quantum dot lasers; quantum well lasers; coupling efficiency; current injection; far-field patterns; optical beam quality; quantum dash laser diodes; quantum dot laser diodes; quantum well laser diodes; semiconductor lasers; single lobe Gaussian-shape; threshold current; Diode lasers; Gain measurement; Optical beams; Optical coupling; Performance evaluation; Performance gain; Quantum dot lasers; Quantum dots; Quantum well lasers; Semiconductor lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

PhotonicsGlobal@Singapore, 2008. IPGC 2008. IEEE

Conference_Location

Singapore

Print_ISBN

978-1-4244-3901-0

Electronic_ISBN

978-1-4244-2906-6

Type

conf

DOI

10.1109/IPGC.2008.4781309

Filename

4781309