A Compensation Method ersion-Induced Third-

Abstruct- A method to compensate dispersion-induced thirdorder intermodulation distortion (1M3c~) in subcarrier multiplexing (SCM) optical transmission systems is proposed. It is confirmed theoretically and experimentally that IM3co can be compensated by interference-induced third-order intermodulation distortion (IM~IN). Simple analytic expressions of 1M3c~ and IM~IN are derived from the same expression of optical electric field which includes exact phase term taking into account the phase of laser chirp. From the theoretical analyses, we clarified the conditions of IM3c~-compensation. IM~IN can be easily generated by an etalon which is a kind of interferometer and a optical glass plate. More than 30 dB of IM3c~-compensation was achieved, and IM3co-COmpenSation was achieved regardless of the transmission distance by adjusting tilt angle of the etalon. Using this method, high quality signal transmission can be realized even though the wavelength of laser diode (LD) is not coincident with the fiber zero dispersion wavelength.