Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Optical Fiber Communication Conference
  • 1996 OSA Technical Digest Series (Optica Publishing Group, 1996),
  • paper WM6

Experimental demonstration of dynamic equalization of three 2.5-Gbit/s WDM channels over 1000 km using acousto-optic tunable filters

Not Accessible

Your library or personal account may give you access


The combination of erbium-doped fiber amplifiers (EDFAs) and wavelength-division multiplexing (WDM) offers a dramatic increase in the system capacity for ultra-long-distance transmission.1 However, one key difficulty in implementing such a system is that the EDFA gain is not uniform with wavelength, especially when incorporating cascades of amplifiers.23 Passive optical filtering for gain equalization can provide system performance improvement, but only for a static point-to- point link. This is because: (1) individual channel powers may vary significantly due to the dynamic nature of the WDM network (i.e., higher, lower, “OFF"), and (2) gain nonuniformity varies with dynamic input load. Because of its ability to function as a multiple-passband filter with independent control of each wavelength passband, the acousto-optic tunable filter (AOTF)4 with active feedback can be used to dynamically equalize the EDFA gain. We demonstrate experimentally the dynamic equalization of the nonuniform EDFA gain by using acoustic-optic tunable filters with active feedback. After 1000km transmission in a recirculating-loop experiment, the maximum power differential is reduced from 20 dB to 1 dB for three 2.5-Gbit/s WDM channels covering an 8-nm wavelength range. The active feedback is verified and ensures proper system performance when the power of any individual channel varies over time, as is likely in a dynamically-reconfigurable WDM network.

© 1996 Optical Society of America

PDF Article
More Like This
Experimental demonstration of active equalization and ASE suppression of three 2.5-Gbit/s WDM-network channels over 2500 km using AOTF as transmission filters

S. H. Huang, X. Y. Zou, A. E. Willner, Z. Bao, and D. A. Smith
CMA4 Conference on Lasers and Electro-Optics (CLEO) 1996

Passive equalization of four 2.5-Gbit/s WDM channels over 1,000 km using notch filters

S.-M. Hwang, X. Y. Zou, S. H. Huang, W. Shieh, and A. E. Willner
CThK21 Conference on Lasers and Electro-Optics (CLEO) 1996

Use of the acousto-optic tunable filter for optical spectrum analysis and EDFA power equalization in WDM systems

M. L. Heston, D. A. Smith, Z. Bao, A. Khaydarov, A. E. Willner, S.-M. Hwang, S. H. Huang, and X. Y. Zou
ThL3 Optical Fiber Communication Conference (OFC) 1996


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 Optica member, or as an authorized user of your institution.

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

Select as filters

Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved