2020/05/09 by Snehashis Sadhukhan, Sadhukhan, Snehashis, Arnab Laha +5
Engineering · Physics and Astronomy · #Advanced Fiber Optic Sensors #Applied Physics (physics.app-ph) #FOS: Physical sciences #Optics (physics.optics) #Photonic Crystals and Applications #Photonic and Optical Devices #physics.app-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.2005.04413
5 pages; 4 figures
arxiv created 2020/05/09 · openalex publication_date 2020/05/09 · arxiv updated 2020/05/12 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
We report a very high precision interferometric sensor with resolution up to ~λ/1024, exploiting hollow photonic bandgap waveguide-based geometry for the first time. Here sensing has been measured by a complete switching in the direction of the outgoing beam, owing to transverse momentum oscillation phenomena. Using a 1.32 μm source and core-width of 7.25 μm, a complete switching cycle is obtained even due to a small change of ~1 nm in the core-width. Using hollow-core photonic bandgap waveguide, Talbot effect, revivals of the initial phase, oscillation in the transverse momentum along with multi-mode interference served as the backbone of the design. The ultra-sensitive multi-mode interferometric sensor based on photonic crystals will certainly open up a paradigm shift in interferometer-based sensing technologies toward device-level applications in photonic sensing/switching and related precision measurement systems.