Remote microwave wavelength spectrometry using an infrared fibre optic telecommunication network

摘要

Reported is the first experimental demonstration of remote microwave spectroscopy of an absorbing gas over a fibre optic link [J.F.Alder, J.G.Baker, Quantitive Millimetre Wavelength Spectrometry, Royal Society of Chemistry, Cambridge, 2002]. Using a high speed telecommunication network and a 12 GHz YIG source, a microwave modulated infrared carrier has been transmitted down 1 km of optical fibre. Absorption lines as weak as 2.83 X 10~(-5) m~(-1) have been observed by coupling the recovered microwave signal through a 2 m Stark modulated absorption cell.