Abstract

We experimentally demonstrate the adding, dropping, and passing through of 100-Gbit/s word packets in a looped-back all-optical time-division-multiplexed (TDM) access node. Packets are routed with a 17-dB contrast ratio and demultiplexed with a 20-dB contrast ratio. This node uses short 100-Gbit/s words to demonstrate its potential to process data packets from multiple sources and to perform packet switching in a multinode ring network configuration. The ability to tolerate timing jitter as well as varying input signal characteristics is essential to an all-optical access node in a multinode network. For 2-ps input pulses, the header processor has a timing window of ∼5 ps, and the demultiplexer has a timing window of ∼5.5 ps. This allows for tolerance to bit-to-bit timing jitters or to an increase in the pulse width of as much as 3 ps. Packet-to-packet timing jitter is detected and compensated by the technique used to synchronize the local source to each packet. The key enabling technologies of an all-optical TDM packet add–drop multiplexer are discussed, including an erbium-doped fiber laser, a nonlinear optical loop mirror logic gate, self-synchronization to incoming packets with a fast-saturation/slow-recovery gain element followed by an intensity discriminator, a two-wavelength nonlinear optical loop mirror demultiplexer, and synchronization of new packets to the network packet rate with a phase-locked loop. The local source is automatically synchronized to the incoming packet, because it uses an extracted pulse from the packet, which has a contrast ratio of >20 dB to the rest of the packet. Finally, new packets are added by use of a local laser and a synchronization method, which gives a timing jitter of ∼1 ps. Using a statistical method of measuring Q value with picosecond resolution, we show that a header processor with two cascaded logic gates has a Q value of 7.1 with a 95% confidence level.

© 2000 Optical Society of America

Cascadability and functionality of all-optical low-birefringent nonlinear optical loop mirror: experimental demonstration

K. H. Ahn, X. D. Cao, Y. Liang, B. C. Barnett, S. Chaikamnerd, and M. N. Islam
J. Opt. Soc. Am. B 14(5) 1228-1236 (1997)

Ultrafast walk-off-free nonlinear optical loop mirror by a simplified configuration for 320-Gbit/s time-division multiplexing signal demultiplexing

Hideyuki Sotobayashi, Chikara Sawaguchi, Yahei Koyamada, and Wataru Chujo
Opt. Lett. 27(17) 1555-1557 (2002)

Bit-level packet-switching all-optical multihop shuffle networks with deflection routing

Seung-Woo Seo, Ben Y. Yu, and Paul R. Prucnal
Appl. Opt. 36(14) 3142-3146 (1997)

Integrated model for performance analysis of all-optical multihop packet switches

Han-You Jeong and Seung-Woo Seo
Appl. Opt. 39(26) 4770-4782 (2000)

Optical implementation of asynchronous-transfer-mode header-error control

Pierpaolo Boffi, Guido Maier, Mario Martinelli, and Riccardo Melen
Appl. Opt. 39(5) 827-834 (2000)