Enhancing the 3-dB Bandwidth via the Gain-Lever Effect in Quantum-Dot Lasers

Author

Li, Y. ; Naderi, N.A. ; Kovanis, V. ; Lester, L.F.

Author_Institution

Center for High Technol. Mater. (CHTM), Univ. of New Mexico, Albuquerque, NM, USA

Volume

2

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

321

Lastpage

329

Abstract

We investigate the small-signal modulation response of two-section, gain-lever, quantum-dot semiconductor lasers. A three-pole modulation function is derived from a 3-D set of rate equations, and a 70% 3-dB bandwidth enhancement is computed and experimentally realized in an undoped quantum-dot gain-lever laser under extreme asymmetric-bias conditions. Finally, it is demonstrated that the 3-dB bandwidth is three times the free-running relaxation oscillation frequency in these types of laser structures, as opposed to 1.55 times in the case of conventional single-section lasers.

Keywords

optical modulation; quantum dot lasers; 3-dB bandwidth enhancement; free-running relaxation oscillation frequency; gain-lever effect; quantum-dot semiconductor lasers; rate equations; small signal modulation; three-pole modulation function; Bandwidth; Chirp modulation; High speed optical techniques; Laser theory; Masers; Optical devices; Optical feedback; Optical modulation; Quantum dot lasers; Semiconductor lasers; Gain lever; modulation bandwidth; quantum dot;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2010.2046481

Filename

5446332