Low-cost 2 Mbit/s optical local line transmission system using single-mode fibre

Abstract We present an optically powered, intrinsically safe gas monitoring system to measure four essential environmental gases (CH4, CO2, CO and O2), together with ambient temperature and pressure, for underground mines. The system is based on three key technologies developed at UNSW: (1) power-over-fibre (PoF) at 1,550 nm using a single industry-standard, low-cost single-mode fibre (SMF) for both power delivery and information transmission, (2) liquid-crystal-based optical transducers for optical telemetry, and (3) ultra-low power consumption design of all electronics. Together, this approach allows each gas monitoring station to operate with less than 150 mW of optical power, meeting the intrinsic safety requirements specified by the IEC60079-28 standard. A 2-month field trial at BMA’s Broadmeadow underground mine proved the cabling compatibility to the mine’s existing optical network and the stability of the system performance. Compared with conventional electrically powered gas sensors, this technology bypasses the usual roadblocks of underground gas monitoring where electrical power is either unsafe or unavailable. Furthermore, using one fibre for both power delivery and communication enables longer distance coverage, reduces optical cabling and increases multiplexing possibilities and data throughput for better awareness of underground environment.

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High-speed polarization mode dispersion compensation in a 43-Gb/s RZ-DQPSK transmission system over 1200 km of standard single-mode fibre

Chinese Physics B ◽

10.1088/1674-1056/20/8/080702 ◽

2011 ◽

Vol 20 (8) ◽

pp. 080702 ◽

Cited By ~ 2

Author(s):

Feng Tian ◽

Xiao-Guang Zhang ◽

Xuan Weng ◽

Li-Xia Xi ◽

Yang-An Zhang ◽

...

Keyword(s):

High Speed ◽

Dispersion Compensation ◽

Polarization Mode Dispersion ◽

Single Mode ◽

Transmission System ◽

Polarization Mode ◽

Single Mode Fibre ◽

Mode Dispersion ◽

Mode Fibre

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Realisation and implementation of an optimised post-detection filter for a 10 Gbit/s dispersive transmission system using single-mode fibre

10.1109/icc.1996.540265 ◽

2002 ◽

Cited By ~ 1

Author(s):

A. Hussain ◽

J.M.H. Elmirghani ◽

R.A. Cryan

Keyword(s):

Single Mode ◽

Transmission System ◽

Single Mode Fibre ◽

Mode Fibre ◽

Detection Filter

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Dual Fabry–Pérot Interferometric Carbon Monoxide Sensor Based on the PANI/Co3O4 Sensitive Membrane-Coated Fibre Tip

Zeitschrift für Naturforschung A ◽

10.1515/zna-2018-0453 ◽

2019 ◽

Vol 74 (2) ◽

pp. 101-107 ◽

Cited By ~ 6

Author(s):

Jin Peng ◽

Wenlin Feng ◽

Xiaozhan Yang ◽

Guojia Huang ◽

Shaodian Liu

Keyword(s):

Carbon Monoxide ◽

Low Cost ◽

High Sensitivity ◽

Single Mode ◽

Photonic Crystal Fibre ◽

Single Mode Fibre ◽

Fabry Perot ◽

Response And Recovery ◽

Sensing Membrane ◽

Mode Fibre

AbstractA novel dual Fabry–Pérot (F-P) interferometric carbon monoxide gas sensor based on polyaniline/Co3O4 (PANI/Co3O4) sensing film coated on the optical fibre end face is proposed and fabricated. Its structure is composed of standard single-mode-fibre (SMF), endlessly photonic crystal fibre (EPCF), and PANI/Co3O4 sensing membrane (PCSM). Therefore, they form three F-P reflectors, the reflector between SMF and EPCF, that between EPCF and PCSM, and interface between PCSM and air. So, the dual F-P interferometer is achieved. The results show that in the range of 0–70 ppm, the interference spectra appear red shift with the increasing carbon monoxide concentration. In addition, the high sensitivity of 21.61 pm/ppm, the excellent linear relationship (R2 = 0.98476), and high selectivity for carbon monoxide are achieved. The response and recovery time are 35 and 84 s, respectively. The sensor has the advantages of high sensitivity, strong selectivity, low cost, and simple structure and is suitable for sensitive detection of trace carbon monoxide gas.

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