Influence of optical feedback-induced phase on turn-on dynamics of vertical-cavity surface-emitting semiconductor lasers

Author

Mahmoud, Safwat W Z ; Ahmed, Moustafa F. ; Michalzik, Rainer

Author_Institution

Dept. of Phys., Minia Univ., El-Minia, Egypt

Volume

3

fYear

2003

fDate

27-30 Dec. 2003

Firstpage

1354

Abstract

We report on experimental and theoretical study of the influence of optical feedback-induced phase change on both the coupled optical power from GaAs based VCSEL into a multimode fiber under continuous wave operation and the turn-on dynamics under current modulation. A standing-wave interference pattern of laser light between the fiber facet and the VCSEL top mirror generates external optical feedback to the VCSEL, The phase variation of the feedback light changes the threshold gain periodically with a half-wavelength period. When the fiber is located at maxima and minima of this pattern, it causes a change of 50 μA in the threshold current under continuous wave (CW) operation. Thin change of threshold current induces a change in the turn-on delay time by 50 ps under bias-free pulsed operation.

Keywords

gallium arsenide; laser feedback; semiconductor lasers; surface emitting lasers; bias-free pulsed operation; continuous wave; coupled optical power; current modulation; feedback light; feedback-induced phase change; laser light; multimode fiber; standing-wave interference pattern; vertical-cavity surface-emitting semiconductor lasers; Fiber lasers; Laser feedback; Laser theory; Optical feedback; Optical modulation; Optical surface waves; Semiconductor lasers; Surface emitting lasers; Threshold current; Vertical cavity surface emitting lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003 IEEE 46th Midwest Symposium on

ISSN

1548-3746

Print_ISBN

0-7803-8294-3

Type

conf

DOI

10.1109/MWSCAS.2003.1562546

Filename

1562546