Dispersion penalty analysis using light injection method in the feedforward optical transmitter for WDM/SCM radio-over-fiber systems |
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| Authors: | Yon-Tae Moon |
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| Institution: | Microwave and Lightwave Telecommunications Laboratory, School of Electrical and Electronics Engineering, Chung-Ang University, 221 Heuksuk-Dong, Dongjak-ku, Seoul 156-756, Republic of Korea |
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| Abstract: | We have experimentally and theoretically demonstrated the transmission performance of a feedforward optical transmitter using an external light injection technique. The feedforward compensation method shows 31 dB intermodulation distortion suppression and 2.2 dB noise reduction. The feedforward architecture used a wavelength-locked Fabry-Perot laser diode whose side-mode suppression ratio about 35 dB over a 12-nm range. The suppression characteristics of the intermodulation distortion for various wavelength differences and transmission lengths were measured and analyzed as the evaluation criteria for the system performance in WDM/SCM based radio-over-fiber systems. |
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| Keywords: | Optical communications Optical feedforward compensation method Distributed-feedback laser diode Light injection technique |
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