Session Index

S9. Optical Sensing

Optical Sensing II
Friday, Dec. 1, 2023  15:15-17:30
Presider: Prof. Wen-Fung Liu (Feng Chia University, Taiwan) Prof. Nai-Hsiang Sun (I-Shou University, Taiwan)
Room: 92371 (3F)
15:15 - 15:45
Manuscript ID.  0647
Paper No.  2023-FRI-S0902-I001
Invited Speaker:
Morten Ibsen
Optical Fibre Sensor Technologies for High-Speed Monitoring of Rapid Chemical Reactions and Detonation Events
Morten Ibsen, University of Southampton (UK)

Fibre Bragg gratings (FBGs) are well-established all-fibre devices capable of monitoring a range of parameters in various configurations with high precision incl., strain, temperature, and pressure. Due to the ability to accurately design the phase and amplitude response from FBGs into their spatial refractive index profile, and because of the flexibility to precisely control their length, they can also be used as devices to help correct signal distortion encountered in optical transmission systems resulting from, for example, timing- jitter and chromatic dispersion. The precise control of length can also be utilised to monitor and determine perturbations continuously along their length, in real-time. One such application, demonstrated and researched more extensively in recent years, is the ability to monitor and determine the velocity of rapid chemical reactions and detonation events with a very high degree of spatial precision.

The speed at which shock-fronts advance through a material – the velocity of reaction/detonation – is an important measure for assessing the performance and characteristic behaviour of the material. Optical fibre sensors, incl., FBGs, are proving an excellent diagnostic tool for this purpose too, and because of their small size, they can be used as embedded probes offering minimal physical invasiveness into the compounds and materials being tested. In this talk we will review and discuss our research in this area and discuss probes based on both uniform and chirped FBGs, bare fibres, and rare-earth doped fibres. We will discuss how these probes are designed and discuss the advantages and limitations of each of them depending on the exact application and system they are designed for. We will show that using a new approach we developed based on uniform FBGs it is possible to achieve spatial uncertainties below ±10m when determining the position of the perturbation on the FBGs during high-speed events with velocities in excess of ~6mm/s (6km/s).

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15:45 - 16:00 Award Candidate (Paper Competition)
Manuscript ID.  0108
Paper No.  2023-FRI-S0902-O001
Jui-Hsiang Yen Real Time Roughness Measurement with Big Data Analysis of BRDF Scattering Pattern
Jui-Hsiang Yen, Pin-Jyun Hou, Cheng-Huan Chen, National Yang Ming Chiao Tung University (Taiwan)

Scattering is the most common phenomenon in optics, but it has not been widely adopted in online real-time scenarios. In view of the potential for real-time intelligent scattering detection, this paper proposes a conceptual structured light scattering detection device.

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16:00 - 16:15 Award Candidate (Paper Competition)
Manuscript ID.  0452
Paper No.  2023-FRI-S0902-O002
Siddharth Rana Highly Sensitive X ray Photodetector based on Zinc Gallium oxide
Siddharth Rana, National Yang Ming Chiao Tung University (Taiwan), Indian Institute of Technology Delhi (India); Shang jui chui, National Synchrotron Radiation Research Center (Taiwan); Jitendra Pratap Singh, Indian Institute of Technology Delhi (India); Ray Hua Horng, National Yang Ming Chiao Tung University (Taiwan)

An epilayer of Zinc Gallium oxide with a thickness of 100 nm was successfully grown on a c-plane sapphire substrate using the metalorganic chemical vapor deposition technique. The performance of the designed photodetectors was evaluated by measuring the photocurrent under various bias voltages and distinct x ray flux intensities: ranging from 107 to 1011 counts per sec. Additionally, the transient response of the photodetector was examined. The findings revealed that these designed photodetectors exhibited higher sensitivity compared to detectors based on gallium oxide.

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16:15 - 16:30 Award Candidate (Paper Competition)
Manuscript ID.  0529
Paper No.  2023-FRI-S0902-O003
Devesh Barshilia Waveguide Nanogold linked immunosorbent assay biosensor as key enabler for early sepsis diagnosis
Devesh Barshilia, Guo-En Chang, National Chung Cheng University (Taiwan)

We demonstrated neoteric point of care fulfilling waveguide nanogold linked immunosorbent assay optical biosensor to endow ultra-sensitive and prompt detection of crucial biomarkers such as Procalcitonin. The proposed sensor reveals excellent biosensing performance with a negligible low non-specific adsorption, low record LOD of value 48.7 fg/mL and short detection time of nearly 9 minutes.

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16:30 - 16:45 Award Candidate (Paper Competition)
Manuscript ID.  0716
Paper No.  2023-FRI-S0902-O004
CHih-Hao Chang Pulsed lidar base on gain-switched semiconductor laser with a recirculating delay lines interferometer
CHih-Hao Chang, Fan-Yi Lin, Institute of Photonics Technologies (Taiwan)

This study focuses on generating random modulated pulses using a gain-switched semiconductor laser with a recirculating delay lines (RDL) interferometer designed for pulsed lidar application. The RDL structure's multi-interference bestows the random modulate pulse with high modulation and low-correlation characteristics, well-suitable for pulsed lidar unambiguity ranging and jamming resistance. By adjusting laser bias currents and RDL delay lengths, we assess two distinct scenarios: one optimizing precision for 3D reconstruction, and another emphasizing low correlation for anti-jamming. Finally, we successfully demonstrate 3D imaging, showcasing exceptional precision in capturing intricate detail, such as the Marseille statue.

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16:45 - 17:00 Award Candidate (Paper Competition)
Manuscript ID.  0777
Paper No.  2023-FRI-S0902-O005
Gajendra Suthar, National Yangming Chiaotung University (Taiwan); Chih-Wei Chu, Academia Sinica (Taiwan); Fang Chung Chen, National Yangming Chiaotung University (Taiwan)

Photomultiple narrowband organic photodiodes (PM-NOPDs) are fabricated using a
planar heterojunction structure. The bottom PM6 layer selects excitons, while the top P3HT: PC70BM layer acts as a photomultiplication layer. The device functions with electron tunneling injection caused by hole accumulation near the Ag electrode. Because only selected exciton undergoes photomultiplication, the detector exhibits a high external quantum efficiency of 5840%, a narrowband peak at 680 nm, and a spectral response of over 30 A/W at -5 V. This approach allows for the fabrication of high-performance PM-NOPDs with low bias, low noise, and high speed.

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17:00 - 17:15 Award Candidate (Paper Competition)
Manuscript ID.  0975
Paper No.  2023-FRI-S0902-O006
Thanh Duy Cu Designing Ultrahigh-Figure-of-Merit Refractive Index Sensors: Leveraging Thin-Film Properties and Guided-Mode Resonance
Thanh Duy Cu, Hong-Wei Wu, Chen-Cheng Kuo, National Central University (Taiwan)

Guided mode resonance (GMR) gratings are gaining traction in sensing applications. This study outlines an optimal, easy-to-fabricate one-dimensional GMR grating with enhanced performance using thin films. Its design boosts the sensing performance with figure of merit values reaching hundreds of thousands. Simulations show an optimized grating with a sensitivity of 252 and a narrow bandwidth of 0.0002 nm. Remarkably, at a 50° incident angle, its figure of merit reaches 839,666, outperforming traditional GMR sensors significantly. Simulations at 60° and 70° incident angles expand its applicability, offering insights into the sensor's varied performance scenarios.

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17:15 - 17:30 Award Candidate (Paper Competition)
Manuscript ID.  0781
Paper No.  2023-FRI-S0902-O007
Zi Wang BOTDA integrated Ф-OTDR Distributed Fiber Sensing System for Simultaneous Multi-Parameter Monitoring
Zi Wang, Yang-En Zou, Chen-Yin Guo, Shien-Kuei Liaw, National Taiwan University of Science and Technology (Taiwan); Ya-Mei Yang, Bo-Heng Lee, Industrial Technology Research Institute (Taiwan)

In this article, the integration of the brillouin optical time-domain analysis (BOTDA) and the phase-sensitive optical time domain reflectometry (Ф-OTDR) distributed fiber sensing systems is discussed. By combining the two systems and sharing common instruments, the cost of the experiments is minimized, enabling the sensing of three parameters: temperature, strain, and vibration on the same 18.7 km fiber.

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