In this paper, alcohol solution is added into the center hole of PCF-SPR sensor to realize the dual parameter sensor of temperature and refractive index (RI) simultaneously. Firstly, the external temperature is fixed at 20 °C, and the RI of the alcohol solution is changed. The resonance wavelength sensitivity is -6015.4 nm/RIU and the linearity is 0.99985 when the RI of alcohol solution is from 1.34 to 1.3654 with a resonance-loss sensitivity of -2640 dB/RIU and a linearity of 0.99475, respectively. When the concentration of alcohol solution is fixed at 70.4% and the external temperature of PCF is changed, the resonance loss sensitivity is 1.0375 dB/°C and the linearity is 0.976 when the external temperature is changed between 20 °C and 80 °C, its resonance loss sensitivity is 2.4219 nm/°C and the linearity is 0.9997. Finally, the sensor matrix of temperature and refractive index with respect to the shift of resonant wavelength and the change of resonant loss is obtained.
A multiplexed gas sensing network based on hollow-core photonic crystal fiber (HC-PCF) and active intra-cavity absorption spectrometry is designed and demonstrated experimentally. Sensing channels are extended to eight by using hybrid dense wavelength division multiplexing (DWDM) and time division multiplexing (TDM). What’s more, wavelength scanning technique combined with voltage gradient method are adopted in the designed sensing network, which improves the sensing efficiency at least five times when comparing with the whole scan. In experiment, by recording and analyzing the laser output intensity at acetylene absorption peaks of 1528.01 nm and 1530.37 nm, the minimum detection limit (MDL) of 30.16 ppmv and 26.28 ppmv are achieved, respectively. Therefore, the designed gas sensing network can realize detection of low-concentration gas with high capacity and efficiency.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.