Title :
A 100-channel optical FM six-stage in-line amplifier system employing tunable gain equalizers
Author :
Toba, Hiromu ; Nakanishi, Kenji ; Oda, Kazuhiro ; Inoue, Kyo ; Kominato, Toshimi
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa, Japan
Abstract :
A six-cascade in-line amplifier system that utilizes gain equalizers to successfully transmit 100 optical frequency-division-multiplexed (FDM) signals is described. Total net gain of 98 dB is obtained with a gain imbalance of 2.3 dB by employing the Mach-Zehnder filter based tunable gain equalizers; the gain imbalance is 19.3 dB without the equalizers. Bit-error-rate performance of 100-channel FSK signals at 622 Mb/s also confirms the feasibility of the gain equalizers.<>
Keywords :
fibre lasers; frequency division multiplexing; frequency shift keying; integrated optics; laser tuning; optical filters; optical links; optical modulation; 100-channel FSK signals; 2.3 dB; 622 Mbit/s; EDFA; Er-doped fibre amplifiers; Mach-Zehnder filter; bit-error-rate performance; gain imbalance; in-line amplifier; net gain; optical FM; optical frequency-division-multiplexed; planar waveguide filters; six-cascade; six-stage; tunable gain equalizers; Equalizers; Frequency shift keying; OFDM; Optical amplifiers; Optical attenuators; Optical filters; Optical transmitters; Semiconductor optical amplifiers; Stimulated emission; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
