A distributed fiber optic chemical sensor for hydrogen cyanide detection

Cordero, Steven R.; Beshay, Manal; Low, Aaron; Mukamal, Harold; Ruiz, David; Lieberman, Robert A.

doi:10.1117/12.630958

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…Distributed optical fiber sensors based on evanescent field interactions enable the measurement of chemical distributions over very long distances. Their potential applications are in structural health monitoring, environmental monitoring, homeland security, and many other applications [93][94][95][96][97][98][99][100].…”

Section: Evanescent Field Hollow Core Liquid Filled and Exposed Optmentioning

confidence: 99%

Advances on Optical Fiber Sensors

Mescia

Prudenzano

2013

Fibers

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In this review paper some recent advances on optical fiber sensors are reported. In particular, fiber Bragg grating (FBG), long period gratings (LPGs), evanescent field and hollow core optical fiber sensors are mentioned. Examples of recent optical fiber sensors for the measurement of strain, temperature, displacement, air flow, pressure, liquid-level, magnetic field, and the determination of methadone, hydrocarbons, ethanol, and sucrose are briefly described.

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Section: Evanescent Field Hollow Core Liquid Filled and Exposed Optmentioning

confidence: 99%

Advances on Optical Fiber Sensors

Mescia

Prudenzano

2013

Fibers

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“…Over the years, different gas detection methods have been introduced, as the monitoring and early detection of harmful compounds concern scientists and field workers [ 10 , 11 ]. Cordero et al [ 12 ] detected chlorine and hydrogen sulfide by coating the optical fiber with indicators, fluorinated polymers, and silica. A 10 m long fiber could detect from 1 ppm to 20 ppm of chlorine and hydrogen sulfide.…”

Section: Introductionmentioning

confidence: 99%

Curcuma longa-Based Optical Sensor for Hydrochloric Acid and Ammonia Vapor Detection

Juárez

Carrión

et al. 2023

Sensors

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In this research, we present a prototype optical system that offers significant advances in detecting hydrochloric acid (HCl) and ammonia (NH3) vapors. The system utilizes a natural pigment sensor based on Curcuma longa that is securely attached to a glass surface support. Through extensive development and testing with HCl (37% aqueous solution) and NH3 (29% aqueous solution) solutions, we have successfully demonstrated the effectiveness of our sensor. To facilitate the detection process, we have developed an injection system that exposes C. longa pigment films to the targeted vapors. The interaction between the vapors and the pigment films triggers a distinct color change, which is then analyzed by the detection system. By capturing the transmission spectra of the pigment film, our system allows a precise comparison of these spectra at different concentrations of the vapors. Our proposed sensor exhibits remarkable sensitivity, allowing the detection of HCl at a concentration of 0.009 ppm using only 100 µL (2.3 mg) of pigment film. In addition, it can detect NH3 at a concentration of 0.03 ppm with a 400 µL (9.2 mg) pigment film. Integrating C. longa as a natural pigment sensor in an optical system opens up new possibilities for detecting hazardous gases. The simplicity and efficiency of our system, combined with its sensitivity, make it an attractive tool in environmental monitoring and industrial safety applications.

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“…Despite the number of potentially important applications, relatively few practical distributed chemical sensing systems based on evanescent field interac-tions have been reported [6][7][8][9][10]. This is primarily due to the difficulty of protecting the optical-fiber sensor while allowing sufficiently sensitive interaction between the target chemical species and the guided light in the fiber core.…”

Section: Introductionmentioning

confidence: 99%

Characterization of time-resolved fluorescence response measurements for distributed optical-fiber sensing

et al. 2010

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A distributed optical-fiber sensing system based on pulsed excitation and time-gated photon counting has been used to locate a fluorescent region along the fiber. The complex Alq3 and the infrared dye IR-125 were examined with 405 and 780 nm excitation, respectively. A model to characterize the response of the distributed fluorescence sensor to a Gaussian input pulse was developed and tested. Analysis of the Alq3 fluorescent response confirmed the validity of the model and enabled the fluorescence lifetime to be determined. The intrinsic lifetime obtained (18.2±0.9 ns) is in good agreement with published data. The decay rate was found to be proportional to concentration, which is indicative of collisional deactivation. The model allows the spatial resolution of a distributed sensing system to be improved for fluorophores with lifetimes that are longer than the resolution of the sensing system.

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A distributed fiber optic chemical sensor for hydrogen cyanide detection

Cited by 10 publications

References 6 publications

Advances on Optical Fiber Sensors

Advances on Optical Fiber Sensors

Curcuma longa-Based Optical Sensor for Hydrochloric Acid and Ammonia Vapor Detection

Characterization of time-resolved fluorescence response measurements for distributed optical-fiber sensing

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