Linearity enhancement of an electroabsorption modulated laser by dual-parallel modulation

Author

Jung, Hyun-Do ; Jeon, Duk-Ho ; Han, Sang-Kook

Author_Institution

Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea

Volume

14

Issue

4

fYear

2002

fDate

4/1/2002 12:00:00 AM

Firstpage

462

Lastpage

464

Abstract

A novel linearization process in an electroabsorption-modulated laser (EML) is proposed and experimentally demonstrated. A dual-parallel modulation scheme is used to compensate the nonlinear component of the EML by controlling the dc bias voltages of each EML separately. The validity of the proposed modulation scheme is confirmed through simulations and experiments. From a dual-parallel modulation experiment at 8 GHz, a reduction of 23 dB in IMD3 and a following increase of linear dynamic range of 19.6 dB are achieved compared to those of a single EML operation.

Keywords

distributed feedback lasers; electro-optical modulation; electroabsorption; quantum well lasers; 8 GHz; dc bias voltages; distributed feedback laser diode; dual-parallel modulation; efficient analog optical transmitter; electroabsorption modulated laser; linear dynamic range; linearity enhancement; linearization process; multiple-quantum-well lasers; nonlinear component; Dynamic range; Intermodulation distortion; Laser noise; Linearity; Nonlinear distortion; Nonlinear optics; Optical distortion; Optical modulation; Taylor series; Voltage control;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.992578

Filename

992578