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Title: An ultrahigh-accuracy Miniature Dew Point Sensor based on an Integrated Photonics Platform
Authors: Tao, Jifang
Luo, Yu
Wang, Li
Cai, H.
Sun, Tao
Song, Junfeng
Liu, Hui
Gu, Yuandong
Keywords: Micro-optics
Nanophotonics and plasmonics
Issue Date: 2016
Source: Tao, J., Luo, Y., Wang, L., Cai, H., Sun, T., Song, J., et al. (2016). An ultrahigh-accuracy Miniature Dew Point Sensor based on an Integrated Photonics Platform. Scientific Reports, 6, 29672-.
Series/Report no.: Scientific Reports
Abstract: The dew point is the temperature at which vapour begins to condense out of the gaseous phase. The deterministic relationship between the dew point and humidity is the basis for the industry-standard “chilled-mirror” dew point hygrometers used for highly accurate humidity measurements, which are essential for a broad range of industrial and metrological applications. However, these instruments have several limitations, such as high cost, large size and slow response. In this report, we demonstrate a compact, integrated photonic dew point sensor (DPS) that features high accuracy, a small footprint, and fast response. The fundamental component of this DPS is a partially exposed photonic micro-ring resonator, which serves two functions simultaneously: 1) sensing the condensed water droplets via evanescent fields and 2) functioning as a highly accurate, in situ temperature sensor based on the thermo-optic effect (TOE). This device virtually eliminates most of the temperature-related errors that affect conventional “chilled-mirror” hygrometers. Moreover, this DPS outperforms conventional “chilled-mirror” hygrometers with respect to size, cost and response time, paving the way for on-chip dew point detection and extension to applications for which the conventional technology is unsuitable because of size, cost, and other constraints.
ISSN: 2045-2322
DOI: 10.1038/srep29672
Rights: © 2016 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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