Optical amplifiers could be used in repeaters for wavelength-division- multiplexed (WDM) systems; however, the interaction between multiple signals in optical amplifiers is not well understood. Gain saturation In optical amplifiers is mediated by the carrier density.1,2 Thus the gain of one channel in a multiwavelength amplifier will be affected by the power present In other channels. This will cause crosstalk in amplitude-modulated systems. Similarly, changes in the index of refraction caused by fluctuations in carrier density will cause crosstalk in phase-modulated systems. We have measured changes in the small-signal gain spectrum of an optical amplifier induced by the presence of an intense signal at a different wavelength. We found that three separate mechanisms influence two-color gain saturation in optical amplifiers.

© 1987 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription