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Anomalous spectral behaviour of weakly-fused optical fibre couplers with sub-micron diameters

Anomalous spectral behaviour of weakly-fused optical fibre couplers with sub-micron diameters
Anomalous spectral behaviour of weakly-fused optical fibre couplers with sub-micron diameters
Weakly-fused optical fibre couplers can be simplified as a system of two optical fibre tapers, which are often called nanofibers when having sub-micron diameters. While conventional optical fibre couplers exhibit a wide spectral region of modal interference where two modes provide a continuous oscillatory behaviour associated to the large difference between phase constants of interfering supermodes, nanofiber couplers (NFC) exhibit an anomalous behaviour (Fig. 1) in close proximity to the supermodes cut-off wavelengths, where the high extinction ratio oscillations can exhibit a very slow oscillation. This region of interest exhibits flat transmission over nearly 20nm and results from the variation of the supermodes dispersion near their cut-off. This hybrid behaviour, where a flat transmission region is proximal to rapid spectral oscillations, allows the NFC to operate at high sensitivity as well as large dynamic range for application related to optical detection. &more...
Ismaeel, Rand
c1fb0984-a4c0-484a-8aef-625d48a62086
Talataisong, Wanvisa
e1fa515e-5650-431b-a354-24683c83d714
Gouveia, Marcelo A.
8ada4013-f50e-4d66-b485-f47ddf16cef2
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Ismaeel, Rand
c1fb0984-a4c0-484a-8aef-625d48a62086
Talataisong, Wanvisa
e1fa515e-5650-431b-a354-24683c83d714
Gouveia, Marcelo A.
8ada4013-f50e-4d66-b485-f47ddf16cef2
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Ismaeel, Rand, Talataisong, Wanvisa, Gouveia, Marcelo A., Beresna, Martynas and Brambilla, Gilberto (2017) Anomalous spectral behaviour of weakly-fused optical fibre couplers with sub-micron diameters. CLEO/Europe - EQEC 2017, Munich, Germany. 25 - 29 Jun 2017.

Record type: Conference or Workshop Item (Poster)

Abstract

Weakly-fused optical fibre couplers can be simplified as a system of two optical fibre tapers, which are often called nanofibers when having sub-micron diameters. While conventional optical fibre couplers exhibit a wide spectral region of modal interference where two modes provide a continuous oscillatory behaviour associated to the large difference between phase constants of interfering supermodes, nanofiber couplers (NFC) exhibit an anomalous behaviour (Fig. 1) in close proximity to the supermodes cut-off wavelengths, where the high extinction ratio oscillations can exhibit a very slow oscillation. This region of interest exhibits flat transmission over nearly 20nm and results from the variation of the supermodes dispersion near their cut-off. This hybrid behaviour, where a flat transmission region is proximal to rapid spectral oscillations, allows the NFC to operate at high sensitivity as well as large dynamic range for application related to optical detection. &more...

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Ismaeel CLEO
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Accepted/In Press date: 23 March 2017
Published date: 28 June 2017
Venue - Dates: CLEO/Europe - EQEC 2017, Munich, Germany, 2017-06-25 - 2017-06-29
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 408500
URI: http://eprints.soton.ac.uk/id/eprint/408500
PURE UUID: ce4f8ec1-7477-437e-ba22-a2daade63e06

Catalogue record

Date deposited: 20 May 2017 04:05
Last modified: 19 Jul 2019 18:27

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Contributors

Author: Rand Ismaeel
Author: Marcelo A. Gouveia

University divisions

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