Optimised performance of non-dispersive infrared gas sensors using multilayer thin film bandpass filters

Pinggui Wang, Xiuhua Fu, Des Gibson, Lewis Fleming, Sam Ahmadzadeh, Cheng Li, Manu Muhiyudin, Shigeng Song, David Hutson, David Moodie, Calum Macgregor, Mathew Steer

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Abstract

In this work, performance improvements are described for a low-power consumption non-dispersive infrared (NDIR) methane (CH4) gas sensor using customised optical thin film bandpass filters (BPFs) centered at 3300 nm. BPFs shape the spectral characteristics of the combined mid-infrared III–V based light emitting diode (LED)/photodiode (PD) light source/detector optopair, enhancing the NDIR CH4 sensor performance. The BPFs, deposited using a novel microwave plasma-assisted pulsed DC sputter deposition process, provide room temperature deposition directly onto the temperature-sensitive PD heterostructure. BPFs comprise germanium (Ge) and niobium pentoxide (Nb2O5) alternating high and low refractive index layers, respectively. Two different optical filter designs are progressed with BPF bandwidths (BWs) of 160 and 300 nm. A comparison of the modelled and measured NDIR sensor performance is described, highlighting the maximised signal-to-noise ratio (SNR) and the minimised cross-talk performance benefits. The BPF spectral stability for various environmental temperature and humidity conditions is demonstrated.
Original languageEnglish
Article number472
Number of pages16
JournalCoatings
Volume8
Issue number12
DOIs
Publication statusPublished - 19 Dec 2018

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bandpass filters
sensors
thin films
gases
photodiodes
optical filters
niobium
ambient temperature
humidity
germanium
light sources
signal to noise ratios
light emitting diodes
methane
direct current
refractivity
bandwidth
microwaves
detectors
room temperature

Keywords

  • NDIR
  • Methane
  • Sensor
  • Infrared
  • thin film
  • III-V
  • heterostructure
  • bandpass
  • microwave
  • sputter
  • MBE

Cite this

Wang, Pinggui ; Fu, Xiuhua ; Gibson, Des ; Fleming, Lewis ; Ahmadzadeh, Sam ; Li, Cheng ; Muhiyudin, Manu ; Song, Shigeng ; Hutson, David ; Moodie, David ; Macgregor, Calum ; Steer, Mathew. / Optimised performance of non-dispersive infrared gas sensors using multilayer thin film bandpass filters. In: Coatings. 2018 ; Vol. 8, No. 12.
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abstract = "In this work, performance improvements are described for a low-power consumption non-dispersive infrared (NDIR) methane (CH4) gas sensor using customised optical thin film bandpass filters (BPFs) centered at 3300 nm. BPFs shape the spectral characteristics of the combined mid-infrared III–V based light emitting diode (LED)/photodiode (PD) light source/detector optopair, enhancing the NDIR CH4 sensor performance. The BPFs, deposited using a novel microwave plasma-assisted pulsed DC sputter deposition process, provide room temperature deposition directly onto the temperature-sensitive PD heterostructure. BPFs comprise germanium (Ge) and niobium pentoxide (Nb2O5) alternating high and low refractive index layers, respectively. Two different optical filter designs are progressed with BPF bandwidths (BWs) of 160 and 300 nm. A comparison of the modelled and measured NDIR sensor performance is described, highlighting the maximised signal-to-noise ratio (SNR) and the minimised cross-talk performance benefits. The BPF spectral stability for various environmental temperature and humidity conditions is demonstrated.",
keywords = "NDIR, Methane, Sensor, Infrared, thin film, III-V, heterostructure, bandpass, microwave, sputter, MBE",
author = "Pinggui Wang and Xiuhua Fu and Des Gibson and Lewis Fleming and Sam Ahmadzadeh and Cheng Li and Manu Muhiyudin and Shigeng Song and David Hutson and David Moodie and Calum Macgregor and Mathew Steer",
year = "2018",
month = "12",
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Wang, P, Fu, X, Gibson, D, Fleming, L, Ahmadzadeh, S, Li, C, Muhiyudin, M, Song, S, Hutson, D, Moodie, D, Macgregor, C & Steer, M 2018, 'Optimised performance of non-dispersive infrared gas sensors using multilayer thin film bandpass filters', Coatings, vol. 8, no. 12, 472. https://doi.org/10.3390/coatings8120472

Optimised performance of non-dispersive infrared gas sensors using multilayer thin film bandpass filters. / Wang, Pinggui; Fu, Xiuhua; Gibson, Des; Fleming, Lewis; Ahmadzadeh, Sam; Li, Cheng; Muhiyudin, Manu; Song, Shigeng; Hutson, David; Moodie, David; Macgregor, Calum; Steer, Mathew.

In: Coatings, Vol. 8, No. 12, 472, 19.12.2018.

Research output: Contribution to journalArticle

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T1 - Optimised performance of non-dispersive infrared gas sensors using multilayer thin film bandpass filters

AU - Wang, Pinggui

AU - Fu, Xiuhua

AU - Gibson, Des

AU - Fleming, Lewis

AU - Ahmadzadeh, Sam

AU - Li, Cheng

AU - Muhiyudin, Manu

AU - Song, Shigeng

AU - Hutson, David

AU - Moodie, David

AU - Macgregor, Calum

AU - Steer, Mathew

PY - 2018/12/19

Y1 - 2018/12/19

N2 - In this work, performance improvements are described for a low-power consumption non-dispersive infrared (NDIR) methane (CH4) gas sensor using customised optical thin film bandpass filters (BPFs) centered at 3300 nm. BPFs shape the spectral characteristics of the combined mid-infrared III–V based light emitting diode (LED)/photodiode (PD) light source/detector optopair, enhancing the NDIR CH4 sensor performance. The BPFs, deposited using a novel microwave plasma-assisted pulsed DC sputter deposition process, provide room temperature deposition directly onto the temperature-sensitive PD heterostructure. BPFs comprise germanium (Ge) and niobium pentoxide (Nb2O5) alternating high and low refractive index layers, respectively. Two different optical filter designs are progressed with BPF bandwidths (BWs) of 160 and 300 nm. A comparison of the modelled and measured NDIR sensor performance is described, highlighting the maximised signal-to-noise ratio (SNR) and the minimised cross-talk performance benefits. The BPF spectral stability for various environmental temperature and humidity conditions is demonstrated.

AB - In this work, performance improvements are described for a low-power consumption non-dispersive infrared (NDIR) methane (CH4) gas sensor using customised optical thin film bandpass filters (BPFs) centered at 3300 nm. BPFs shape the spectral characteristics of the combined mid-infrared III–V based light emitting diode (LED)/photodiode (PD) light source/detector optopair, enhancing the NDIR CH4 sensor performance. The BPFs, deposited using a novel microwave plasma-assisted pulsed DC sputter deposition process, provide room temperature deposition directly onto the temperature-sensitive PD heterostructure. BPFs comprise germanium (Ge) and niobium pentoxide (Nb2O5) alternating high and low refractive index layers, respectively. Two different optical filter designs are progressed with BPF bandwidths (BWs) of 160 and 300 nm. A comparison of the modelled and measured NDIR sensor performance is described, highlighting the maximised signal-to-noise ratio (SNR) and the minimised cross-talk performance benefits. The BPF spectral stability for various environmental temperature and humidity conditions is demonstrated.

KW - NDIR

KW - Methane

KW - Sensor

KW - Infrared

KW - thin film

KW - III-V

KW - heterostructure

KW - bandpass

KW - microwave

KW - sputter

KW - MBE

U2 - 10.3390/coatings8120472

DO - 10.3390/coatings8120472

M3 - Article

VL - 8

JO - Coatings

JF - Coatings

SN - 2079-6412

IS - 12

M1 - 472

ER -