OPTICAL PLANAR WAVEGUIDE SENSOR BASED ON (Yb,Nb):RTP/RTP(001) SYSTEM FOR THE ESTIMATION OF METAL COATED CELLS

Butt, Muhammad Ali; Козлова, Е. С.; Хонина, С. Н.; Скиданов, Р. В.

doi:10.18287/1613-0073-2016-1638-16-23

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Since the 1980s, researchers in the field of optical communications have paid close attention to the study and application of optical-waveguide (OWG) sensors [ 36 ]. OWG sensors have been developed for the measurement of trace amounts of a variety of gases [ 37 , 38 , 39 , 40 ]. To the best of our knowledge, EDA and H 2 S gases have, to date, not been determined utilizing OWG methods, even though OWG sensors exhibit several desirable features, including portability, potential for high sensitivity, anti-electromagnetic interference properties (they suffer little or no interference in the waveguide element of the sensor), fast response-recovery times, and intrinsic safety for detection at room temperature when compared to other sensors.…”

Section: Introductionmentioning

confidence: 99%

A Functionalized Tetrakis(4-Nitrophenyl)Porphyrin Film Optical Waveguide Sensor for Detection of H2S and Ethanediamine Gases

Tuerdi

Kari

Yin

et al. 2017

Sensors

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The detection of hydrogen sulfide (H2S) and ethanediamine, toxic gases that are emitted from industrial processes, is important for health and safety. An optical sensor, based on the absorption spectrum of tetrakis(4-nitrophenyl)porphyrin (TNPP) immobilized in a Nafion membrane (Nf) and deposited onto an optical waveguide glass slide, has been developed for the detection of these gases. Responses to analytes were compared for sensors modified with TNPP and Nf-TNPP composites. Among them, Nf-TNPP exhibited significant responses to H2S and ethanediamine. The analytical performance characteristics of the Nf-TNPP-modified sensor were investigated and the response mechanism is discussed in detail. The sensor exhibited excellent reproducibilities, reversibilities, and selectivities, with detection limits for H2S and ethanediamine of 1 and 10 ppb, respectively, and it is a promising candidate for use in industrial sensing applications.

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Section: Introductionmentioning

confidence: 99%

A Functionalized Tetrakis(4-Nitrophenyl)Porphyrin Film Optical Waveguide Sensor for Detection of H2S and Ethanediamine Gases

Tuerdi

Kari

Yin

et al. 2017

Sensors

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“…Due to their potential optical applications, silica, titania, and silica-titania materials obtained by the sol-gel method have been comprehensively studied [35,[161][162][163][164][165][166][167][168][169][170][171][172][173]. The origins of their application for fabrication of silica-titania WG films dates back to the first half of the 1980s.…”

Section: Author's Commentary On Silica-titania Optical Platform Devel...mentioning

confidence: 99%

Optical Thin Films Fabrication Techniques—Towards a Low-Cost Solution for the Integrated Photonic Platform: A Review of the Current Status

et al. 2022

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In the past few decades, several methods concerning optical thin films have been established to facilitate the development of integrated optics. This paper provides a brief depiction of different techniques for implementing optical waveguide thin films that involve chemical, physical, and refractive index modification methods. Recent advances in these fabrication methods are also been presented. Most of the methods developed for the realization of the thin-films are quite efficient, but they are expensive and require sophisticated equipment. The major interest of the scientists is to develop simple and cost-effective methods for mass production of optical thin films resulting in the effective commercialization of the waveguide technology. Our research group is focused on developing a silica-titania optical waveguide platform via the sol-gel dip-coating method and implementing active and passive optical elements via the wet etching method. We are also exploring the possibility of using nanoimprint lithography (NIL) for patterning these films so that the fabrication process is efficient and economical. The recent developments of this platform are discussed. We believe that silica-titania waveguide technology developed via the sol-gel dip-coating method is highly attractive and economical, such that it can be commercialized for applications such as sensing and optical interconnects.

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“…Even though, the high aspect ratio of the strip waveguide, the FEM simulations were carried out in three-dimensional concentration of the target gas, respectively; l is the length of the waveguide and α 0 is the total losses of the waveguide and η is the EFR value at a specific length. For example, CH 4 has an absorption coefficient ε = 8.2 × 10 -5 Pa − 1 cm −1 (8.3 atm −1 cm −1 ) for 3.392 μm line of a He-Ne laser (18). The combination and overtone absorption bands of methane at 1.33 and 1.66 μm have much weaker absorption coefficients.…”

Section: Dependence Of Efr and Sensitivity Of The Gas Sensor On The Wmentioning

confidence: 99%

An evanescent field absorption gas sensor at mid-IR 3.39 μm wavelength

Butt

Degtyarev

Хонина

et al. 2017

Journal of Modern Optics

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Trace gases such as H 2 O, CO, CO 2 , NO, N 2 O, NO 2 and CH 4 strongly absorb in the mid-IR (>2.5 μm) spectral region due to their fundamental rotational and vibrational transitions. CH 4 gas is relatively non-toxic, however, it is extremely explosive when mixed with other chemicals in levels as low as 5% and it can cause death by asphyxiation. In this work, we propose a silicon strip waveguide at 3.39 μm for CH 4 gas sensing based on the evanescent field absorption. These waveguides can provide the highest evanescent field ratio (EFR)>55% with adequate dimensions. Moreover, EFR and sensitivity of the sensor are highly dependent on the length of the waveguide up to a certain limit. Therefore, it is always a compromise between the length of the waveguide and EFR in order to obtain greater sensitivity.

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OPTICAL PLANAR WAVEGUIDE SENSOR BASED ON (Yb,Nb):RTP/RTP(001) SYSTEM FOR THE ESTIMATION OF METAL COATED CELLS

Abstract: Abstract.In this work, we demonstrated metal tagged cell counting based on planar waveguide with the help of a visible light at 633 nm with TM polarization and calculated the output power in relation with the density of cells placed on the waveguide.

Cited by 6 publications

References 22 publications

A Functionalized Tetrakis(4-Nitrophenyl)Porphyrin Film Optical Waveguide Sensor for Detection of H2S and Ethanediamine Gases

A Functionalized Tetrakis(4-Nitrophenyl)Porphyrin Film Optical Waveguide Sensor for Detection of H2S and Ethanediamine Gases

Optical Thin Films Fabrication Techniques—Towards a Low-Cost Solution for the Integrated Photonic Platform: A Review of the Current Status

An evanescent field absorption gas sensor at mid-IR 3.39 μm wavelength

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