Wavelength reuse in a bidirectional UWB over fiber system

Wavelength reuse in a bidirectional UWB over fiber system using a polarization modulator (PolM) and an electro-absorption modulator (EAM) is proposed and experimentally demonstrated. Since the PolM functions as a special phase modulator that supports phase modulation along the two principal axes wit...

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Bibliographic Details
Published in:Optics express 2013-05, Vol.21 (10), p.11921-11927
Main Authors: Shao, Tong, Yao, Jianping
Format: Article
Language:English
Subjects:
Equipment Design
Equipment Failure Analysis
Fiber Optic Technology - instrumentation
Refractometry - instrumentation
Surface Plasmon Resonance - instrumentation
Telecommunications - instrumentation
Transducers
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Summary:Wavelength reuse in a bidirectional UWB over fiber system using a polarization modulator (PolM) and an electro-absorption modulator (EAM) is proposed and experimentally demonstrated. Since the PolM functions as a special phase modulator that supports phase modulation along the two principal axes with opposite modulation indices and the EAM is a polarization-independent component, the signals due to the phase-modulation to intensity-modulation (PM-IM) conversion along the two orthogonal directions in the upstream link will be complementary and cancelled out, thus the impact of the downstream signal to the upstream transmission due to the PM-IM conversion is fully eliminated. Error-free bidirectional transmission of a 1.25-Gbps UWB signal over 17 km single-mode fiber (SMF) is demonstrated. A power penalty due to the wavelength reuse for upstream transmission is measured to be as low as 0.2 dB.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.011921