Highly selective, compact and efficient vertical in-coupling for interferometric optical biosensors
نویسندگان
چکیده
Abstract One of the challenges in using integrated optical biosensors is their ability to operate environments outside laboratories. This occurs, among other reasons, because suitable source coupling components are not considered at design stage. In this work, a highly selective, compact and efficient in-coupling method proposed with aim develop genuine Point-of-care (PoC) platform. The configuration consists single-mode fiber core placed parallel centered above an inverted non-linear taper, which can also be seen as pigtailed input These separated by cladding taper that acts gap. setup, light coupled from then becomes multimode waveguide. modes depend on position geometry taper. For interferometric biosensors, power distribution between very important each one reacts differently sample transducer. Therefore, selectivity stage affects pattern and, consequently, detection process. model presented set fundamental mode (LP 01 ) fiber. Since it centered, only even excited width varies 2 µm 3 µm, order select high-order modes, due large evanescent tails lead sensitive biosensors. format optimizes dividing entire into cascade linear sections. Those desired occurs prioritized increasing lengths, thus making transition smoother. Instead, sections maintain reduced length. To or change them, may just simply length fiber-to-taper 8 mm presented, couples 48% 17% TE 10 respectively.
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ژورنال
عنوان ژورنال: Journal of physics
سال: 2022
ISSN: ['0022-3700', '1747-3721', '0368-3508', '1747-3713']
DOI: https://doi.org/10.1088/1742-6596/2407/1/012045