A novel technique to improve an analog optical transmission performance by reducing both the nonlinearity and chromatic dispersion induced carrier suppression has been proposed. The intrinsic nonlinear distortion component of Mach-Zehnder modulator (MZM) was reduced by gain saturation characteristics of semiconductor optical amplifier (SOA). The composite triple beat (CTB) of MZM was reduced as much as 9 dB at the quadratic bias point and the following enhancement of dynamic range by 4.5 dB was obtained. The RF carrier suppression for the transmission length and operating frequency was reduced by a negative chirp characteristic of semiconductor optical amplifier (SOA) and the enhancement of CTB after transmission were also achieved as a result of the linearization using SOA.
Bibliographical noteFunding Information:
Manuscript received January 2, 2002; revised April 10, 2002. This work was supported by the Korean Ministry of Information and Communication. D.-H. Jeon, H.-D. Jung, and S.-K. Han are with the Department of Electrical and Electronic Engineering, Yonsei University, Shinchon-Dong, Seodaemoon-Ku, Seoul 120-749, Korea; Fax: 82-2-364-4016, E-mail: email@example.com. Publisher Item Identifier S 1041-1135(02)06267-5.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering