Picture of person typing on laptop with programming code visible on the laptop screen

World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

Explore

Modeling and characterization of an electrowetting based single mode fiber variable optical attenuator

Dudus, A. and Blue, R. and Zagnoni, M. and Stewart, G. and Uttamchandani, D. (2015) Modeling and characterization of an electrowetting based single mode fiber variable optical attenuator. IEEE Journal of Selected Topics in Quantum Electronics, 21 (4). ISSN 1077-260X

[img]
Preview
Text (Dudas-etal-IEEE-JSTQE-2015-Modeling-and-characterization-of-an-electrowetting-based-single-mode-fiber)
Dudas_etal_IEEE_JSTQE_2015_Modeling_and_characterization_of_an_electrowetting_based_single_mode_fiber.pdf - Accepted Author Manuscript

Download (1MB) | Preview

Abstract

We report an optofluidics-based variable optical attenuator (VOA) employing a tapered side-polished single-mode optical fiber attached to an electrowetting-on-dielectric (EWOD) platform. The side polishing of the fiber cladding gives access to the evanescent field of the guided mode, while the EWOD platform electrically controls the stepwise translation of a liquid droplet along the variable thickness polished cladding of the fiber. The penetration of the evanescent field into the droplet leads to tunneling of optical power from the fiber core to the droplet, from where it is radiatively lost. As a result of the variable cladding thickness, the position of the droplet along the length of the polished fiber determines the degree of penetration of the evanescent field into the droplet. The droplet position can be electrically changed; thus, controlling the optical power loss from the fiber. This approach has been used to demonstrate an optofluidic continuous-fiber VOA typically providing up to 26 dB of broadband attenuation in the 1550-nm transmission window, with a wavelength dependent loss less than 1.1 dB. In this paper, we present the theoretical modeling and experimental characterization of the system, discussing the influence of the design parameters on the performance of this VOA.