160-Gb/s Optical Time-Division Demultiplexing Using a Mach–Zehnder Modulator in a Fiber Loop
Pelusi, M.D.
Centre for Ultrahigh bandwidth Devices for Opt. Syst. (CUDOS), Sydney Univ., Sydney, NSW
This paper appears in: Photonics Technology Letters, IEEE Publication Date: June15, 2008
Volume: 20
,
Issue: 12
On page(s):
1060
- 1062
Location: San Diego, CA
ISSN: 1041-1135
Digital Object Identifier: 10.1109/LPT.2008.924211
Current Version Published: 2008-05-28
Abstract
Optical switching a 160-Gb/s signal using a LiNbO Mach-Zehnder modulator (MZM) is enabled by a novel method of connecting it within an optical fiber-loop mirror. The principle of operation exploits the unidirectional optical modulation of the MZM such that counterpropagating waves within the loop experience unequal amplitude modulation leading to output transmission of a high-quality 40-GHz pulse train of duration shorter than if using just the MZM alone. Measurements employing a commercially available MZM modulated at 40 GHz in a fiber-loop show generation of a 5.3- to 5.9-ps-wide gate pulse at a 40-GHz repetition rate with center wavelength tunable from 1535 to 1565 nm. Application to optical time-division demultiplexing of a 160-Gb/s return-to-zero format signal achieves less than 1-dB bit-error-rate power penalty for all four of its 40-Gb/s tributaries.
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