Optical sensor in planar configuration based on multimode interference

2017 ◽  
Author(s):  
Marek Blahut
Keyword(s):  
Optical Sensor ◽  
Multimode Interference ◽  
Planar Configuration

A Quasi-Distributed Optical Speckle Sensor and Its Application in Pipeline Security

2008 ◽  
Author(s):  
Jun Li ◽  
Pengchao Chen ◽  
Yongjun Cai ◽  
Dongjie Tan ◽  
Hengzhang Zhou
Keyword(s):  
Experimental Test ◽  
Optical Sensor ◽  
Single Mode ◽  
Zehnder Interferometer ◽  
Multimode Interference ◽  
Underground Pipeline ◽  
Fiber Optical ◽  
Higher Sensitivity ◽  
Mach Zehnder Interferometer

A novel fiber optical speckle sensor based on multimode interference for underground pipeline intrusion detecting is investigated both theoretically and experimentally. The sensor utilizes a single mode to multimode to single mode (SMF-MMF-SMF) structure as a sensing unit, which cascade to create a quasi-distributed optical sensor. To pave it near the underground pipeline we can detect any valid intrusion caused by motion, sound or vibration acts on the fiber. Experimental test shows that the detecting distance can be about 30Km and the locating accuracy of intrusion event is ±500m. Compared with Mach-Zehnder interferometer based configuration it has a much higher sensitivity.

Sensing Performance of a Refractometric Optical Sensor Platform Based on Multimode Interference Couplers

2011 ◽  
Vol 11 (12) ◽  
pp. 3269-3275 ◽  
Author(s):  
Robert Copperwhite ◽  
Mohamed Oubaha ◽  
John Moore ◽  
Colette McDonagh ◽  
Brian D. MacCraith
Keyword(s):  
Optical Sensor ◽  
Multimode Interference ◽  
Sensor Platform ◽  
Multimode Interference Couplers ◽  
Sensing Performance

scholarly journals Model of the broadband interferometric optical biosensor in a planar configuration

2020 ◽  
Vol 12 (2) ◽  
pp. 28
Author(s):  
Marek Blahut
Keyword(s):  
Refractive Index ◽  
Optical Sensor ◽  
High Performance ◽  
Low Cost ◽  
Complex Refractive Index ◽  
Broad Band ◽  
Single Mode ◽  
Optical Biosensor ◽  
Multimode Waveguide ◽  
Planar Configuration

The paper presents numerical studies of the model of an optical sensor based on interference of modes in planar one-dimensional step-index configuration, excited by a broadband light source from a selected spectral range. The refractive index variation of measured external surrounding affects the modal properties of multimode waveguide and the spectral field distribution at the output of the structure. The optical system described is designed to the analysis of biological substances. Full Text: PDF ReferencesM. Blahut, "Optical sensor in planar configuration based on multimode interference" Proc. SPIE, 10455, (2017). CrossRef K. Misiakos, et al, "Broad-band Mach-Zehnder interferometers as high performance refractive index sensors: Theory and monolithic implementation", Opt. Express, 22, 8856, (2014). CrossRef K. Gut, "Study of a Broadband Difference Interferometer Based on Low-Cost Polymer Slab Waveguides", Nanomaterials, 9, 729 (2019). CrossRef M. Nordstrom, et al, "Single-Mode Waveguides With SU-8 Polymer Core and Cladding for MOEMS Applications", J. Light. Techn., 25, 1284, (2007). CrossRef D. Segelstein, "The complex refractive index of water", M.S. Thesis, University of Missouri, (1981). DirectLink https://www.yokogawa.com/pl/solutions/products-platforms/ DirectLink

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