Multiplexing of PVA-coated multimode-fiber taper humidity sensors

A simple multiplexing method for relative humidity (RH) sensors based on multimode-fiber tapers (MFTs) is proposed and demonstrated. By cascading a polyvinyl alcohol (PVA) coated MFT with every channel of an Arrayed-Waveguide Grating (AWG), multipoint RH measurement is achieved. Experimental results...

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Bibliographic Details
Published in:Optics communications 2013-11, Vol.308, p.11-14
Main Authors: Wang, Xueping, Zhao, Chun-Liu, Li, Jihui, Jin, Yongxing, Ye, Manping, Jin, Shangzhong
Format: Article
Language:English
Subjects:
Arrayed-waveguide grating
Channels
Diffraction gratings
Gratings (spectra)
Humidity
Humidity sensors
Multimode-fiber tapers
Multiplexing
Multipoint sensing
Polyvinyl alcohols
Relative humidity
Sensors
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Summary:A simple multiplexing method for relative humidity (RH) sensors based on multimode-fiber tapers (MFTs) is proposed and demonstrated. By cascading a polyvinyl alcohol (PVA) coated MFT with every channel of an Arrayed-Waveguide Grating (AWG), multipoint RH measurement is achieved. Experimental results show that the proposed multipoint RH sensor system works well. The output power for every sensor head is almost linearly increased with the RH, and the average sensitivity of the proposed sensor is about 0.23nW/%RH within the measurement range of 35%RH–90%RH with the taper waist diameter of ∼22μm.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2013.06.018