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Sensors 2013, 13(8), 9999-10013; doi:10.3390/s130809999
Article

Real-Time N2O Gas Detection System for Agricultural Production Using a 4.6-µm-Band Laser Source Based on a Periodically Poled LiNbO3 Ridge Waveguide

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Received: 17 June 2013; in revised form: 12 July 2013 / Accepted: 1 August 2013 / Published: 5 August 2013
(This article belongs to the Special Issue Gas Sensors - 2013)
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Abstract: This article describes a gas monitoring system for detecting nitrous oxide (N2O) gas using a compact mid-infrared laser source based on difference-frequency generation in a quasi-phase-matched LiNbO3 waveguide. We obtained a stable output power of 0.62 mW from a 4.6-μm-band continuous-wave laser source operating at room temperature. This laser source enabled us to detect atmospheric N2O gas at a concentration as low as 35 parts per billion. Using this laser source, we constructed a new real-time in-situ monitoring system for detecting N2O gas emitted from potted plants. A few weeks of monitoring with the developed detection system revealed a strong relationship between nitrogen fertilization and N2O emission. This system is promising for the in-situ long-term monitoring of N2O in agricultural production, and it is also applicable to the detection of other greenhouse gases.
Keywords: periodically poled LiNbO3 (PPLN); laser source; mid infrared; nitrous oxide (N2O); WMS; gas monitoring; cultivated plant; fertilization periodically poled LiNbO3 (PPLN); laser source; mid infrared; nitrous oxide (N2O); WMS; gas monitoring; cultivated plant; fertilization
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Tokura, A.; Asobe, M.; Enbutsu, K.; Yoshihara, T.; Hashida, S.-N.; Takenouchi, H. Real-Time N2O Gas Detection System for Agricultural Production Using a 4.6-µm-Band Laser Source Based on a Periodically Poled LiNbO3 Ridge Waveguide. Sensors 2013, 13, 9999-10013.

AMA Style

Tokura A, Asobe M, Enbutsu K, Yoshihara T, Hashida S-N, Takenouchi H. Real-Time N2O Gas Detection System for Agricultural Production Using a 4.6-µm-Band Laser Source Based on a Periodically Poled LiNbO3 Ridge Waveguide. Sensors. 2013; 13(8):9999-10013.

Chicago/Turabian Style

Tokura, Akio; Asobe, Masaki; Enbutsu, Koji; Yoshihara, Toshihiro; Hashida, Shin-nosuke; Takenouchi, Hirokazu. 2013. "Real-Time N2O Gas Detection System for Agricultural Production Using a 4.6-µm-Band Laser Source Based on a Periodically Poled LiNbO3 Ridge Waveguide." Sensors 13, no. 8: 9999-10013.



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