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Proceedings Paper

Fully reconfigurable optical add/drop multiplexing subsystem on a chip
Author(s): Louay A. Eldada; Junichiro Fujita; Antonije M. Radojevic; Reinald Gerhardt; Deepti Pant; Fang Wang; Chuck C. Xu
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Paper Abstract

We propose a single-chip-based module that provides the entire switching/monitoring/equalizing/shuffling functionality needed in 8-channel fully reconfigurable optical add/drop multiplexers. This subsystem on a chip includes an array of switches for adding/dropping individual channels, optical power taps and integrated photodetectors for power monitoring, variable optical attenuators for channel power equalization, and optical cross-connects for channel shuffling at the add and drop ports for full wavelength agility. The chip is based on a polymer-on-silicon platform that allows hybrid integration of passive and active elements. Waveguiding circuitry is built in an optical polymer, and it includes thermo-optic switches, variable optical attenuators, and power taps. Out-of-plane coupling mirrors are formed by ablation of 45° slopes in the polymer waveguides with an Excimer laser, followed by metalization. A self-aligning flipchip process is used to mount photodetector arrays on top of mirrors fabricated in tap waveguides for power monitoring. The worst-case fiber-to-fiber insertion loss for the proposed module, between 1528 and 1610 nm wavelength, is 1.2 dB from Input to Output (Express), including 4% tapped power, and 1.2 dB from Input to Drop and from Add to Output (4.1 dB with 8×8 shuffle cross-connects). The polarization dependent loss for any path is under 0.2 dB, and the polarization mode dispersion is under 0.05 ps. The channel-to-channel crosstalk is 50 dB, the switch extinction is 45 dB, and the return loss is 50 dB.

Paper Details

Date Published: 30 April 2004
PDF: 11 pages
Proc. SPIE 5279, Optical Fibers and Passive Components, (30 April 2004); doi: 10.1117/12.529567
Show Author Affiliations
Louay A. Eldada, DuPont Photonics Technologies (United States)
Junichiro Fujita, DuPont Photonics Technologies (United States)
Antonije M. Radojevic, DuPont Photonics Technologies (United States)
Reinald Gerhardt, DuPont Photonics Technologies (United States)
Deepti Pant, DuPont Photonics Technologies (United States)
Fang Wang, DuPont Photonics Technologies (United States)
Chuck C. Xu, DuPont Photonics Technologies (United States)

Published in SPIE Proceedings Vol. 5279:
Optical Fibers and Passive Components
Steven Shen; Shuisheng Jian; Katsunari Okamoto; Kenneth L. Walker, Editor(s)

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