Near-Infrared Broadband Cavity-Enhanced Spectroscopic Multigas Sensor Using a 1650 nm Light Emitting Diode

Zheng, Kaiyuan; Zheng, Chuantao; Ma, Ningning; Liu, Zidi; Yang, Yue; Zhang, Yu; Wang, Yiding; Tittel, Frank K.

doi:10.1021/acssensors.9b00788

Cited by 42 publications

(17 citation statements)

References 32 publications

(72 reference statements)

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“…The laser frequency is modulated by a high-frequency sine wave signal-modulated scanning signal with an angular frequency of

. The instantaneous laser frequency is:

where

is the frequency of the scanned signal and β is the amplitude of the frequency change of the sinusoidal modulation, which we define as the modulation factor as the ratio of its half-height width

to that of the absorption peak ( Zheng et al, 2019 ; Pi et al, 2022 ):

…”

Section: Sensor Detection Theorymentioning

confidence: 99%

Performance of a Mid-Infrared Sensor for Simultaneous Trace Detection of Atmospheric CO and N2O Based on PSO-KELM

Zhang

et al. 2022

Front. Chem.

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In this article, a field deployable sensor was developed using a self-developed 4.58-µm continuous wave quantum cascade laser (CW-QCL) for the simultaneous detection of carbon monoxide (CO) and nitrous oxide (N2O), both of which have strong fundamental absorption bands in this waveband. The sensor is based on tunable diode laser absorption spectroscopy (TDLAS) technology, which combined a multi-pass gas cell (MPGC) with a 41 m optical path length to achieve high-precision detection. Meanwhile, the particle swarm optimization-kernel extreme learning machine (PSO-KELM) algorithm was applied for CO and N2O concentration prediction. In addition, the self-designed board-level QCL driver circuit and harmonic signal demodulation circuit reduce the sensor cost and size. A series of validation experiments were conducted to verify the sensor performance, and experiments showed that the concentration prediction results of the PSO-KELM algorithm are better than those of the commonly used back propagation (BP) neural networks and partial least regression (PLS), with the smallest root mean square error (RMSE) and linear correlation coefficient closest to 1, which improves the detection precision of the sensor. The limit of detection (LoD) was assessed to be 0.25 parts per billion (ppb) for CO and 0.27 ppb for N2O at the averaging time of 24 and 38 s. Field deployment of the sensor was reported for simultaneous detection of CO and N2O in the air.

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“…The laser frequency is modulated by a high-frequency sine wave signal-modulated scanning signal with an angular frequency of

. The instantaneous laser frequency is:

where

is the frequency of the scanned signal and β is the amplitude of the frequency change of the sinusoidal modulation, which we define as the modulation factor as the ratio of its half-height width

to that of the absorption peak ( Zheng et al, 2019 ; Pi et al, 2022 ):

…”

Section: Sensor Detection Theorymentioning

confidence: 99%

Performance of a Mid-Infrared Sensor for Simultaneous Trace Detection of Atmospheric CO and N2O Based on PSO-KELM

Zhang

et al. 2022

Front. Chem.

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“…Many of these metamaterial-based light sources offer an easy way to control the wavelength of the emission through scaling the unit cell design to longer or shorter wavelengths, as compared to other light sources [34,35]. In contrast to this, incoherent light sources, such as MIR light-emitting diodes (LEDs), have also received attention due to their small size and low power consumption [36][37][38]. Among the MIR LEDs, super-luminescent light-emitting diodes (sLEDs) offer a unique combination of high brightness, good beam directionality and broadband capability [39].…”

Section: Light Sources 211 Ir Absorption Spectroscopymentioning

confidence: 99%

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Alberti

Datta

Jágerská

2021

Sensors

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On-chip devices for absorption spectroscopy and Raman spectroscopy have been developing rapidly in the last few years, triggered by the growing availability of compact and affordable tunable lasers, detectors, and on-chip spectrometers. Material processing that is compatible with mass production has been proven to be capable of long low-loss waveguides of sophisticated designs, which are indispensable for high-light–analyte interactions. Sensitivity and selectivity have been further improved by the development of sorbent cladding. In this review, we discuss the latest advances and challenges in the field of waveguide-enhanced Raman spectroscopy (WERS) and waveguide infrared absorption spectroscopy (WIRAS). The development of integrated light sources and detectors toward miniaturization will be presented, together with the recent advances on waveguides and cladding to improve sensitivity. The latest reports on gas-sensing applications and main configurations for WERS and WIRAS will be described, and the most relevant figures of merit and limitations of different sensor realizations summarized.

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“…Infrared absorption spectroscopy has been maturely applied to the analysis and characterization of gas and liquid analytes. − However, a sensor system consisting of discrete components and modules usually has a large size and heavy weight, which is not preferred for portable sensing applications. At the same time, environmental vibrations and high power consumption also limit the application of such sensors.…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Infrared Absorption Spectroscopic Chalcogenide Waveguide Sensor Using a Silver Island Film

Zheng

et al. 2021

ACS Appl. Mater. Interfaces

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A surface-enhanced infrared absorption spectroscopic chalcogenide waveguide sensor based on the silver island film was proposed for the first time to enhance the sensing performance in both liquid and gas phases. The chalcogenide waveguide sensor was fabricated by the lift-off and oblique angle deposition methods. The surface morphology of the silver island film with different thicknesses was characterized. The absorption of ethanol (liquid) at a wavelength of 1654 nm and that of methane (gas) at 3291 nm were measured using the fabricated chalcogenide waveguide sensor. The chalcogenide waveguide sensor integrated with the 1.8 nm-thick silver island film revealed the best sensing performance. With an acceptable increased waveguide loss resulting from the fabrication of the film, the absorbance enhancement factors for ethanol and methane were experimentally obtained to be >1.5 and >2.3, respectively. The 1σ limit of detection of methane for the sensor integrated with the 1.8 nm-thick silver island film was ∼4.11% for an averaging time of 0.2 s. The mathematic relation between the absorbance enhancement factor and the waveguide loss was derived for sensing performance improvement. Also, the proposed rectangular waveguide sensor provides an idea for the design of a sensor-on-a-chip instead of other waveguide sensors with a high requirement of fabrication accuracy, for example, a slot waveguide or a photonic crystal waveguide.

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Near-Infrared Broadband Cavity-Enhanced Spectroscopic Multigas Sensor Using a 1650 nm Light Emitting Diode

Cited by 42 publications

References 32 publications

Performance of a Mid-Infrared Sensor for Simultaneous Trace Detection of Atmospheric CO and N2O Based on PSO-KELM

Performance of a Mid-Infrared Sensor for Simultaneous Trace Detection of Atmospheric CO and N2O Based on PSO-KELM

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Surface-Enhanced Infrared Absorption Spectroscopic Chalcogenide Waveguide Sensor Using a Silver Island Film

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