Title :
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
fDate :
4/1/2002 12:00:00 AM
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;
Journal_Title :
Photonics Technology Letters, IEEE
