Development of high refractive index polydimethylsiloxane waveguides doped with benzophenone via solvent-free fabrication for biomedical pressure sensing

Amouzou, Koffi Novignon, Romero, Alberto Alonso, Sengupta, Dipankar, Mishra, Satyendra Kumar, Richard-Denis, Andréane, Mac-Thiong, Jean-Marc, Petit, Yvan, Lina, Jean-Marc et Ung, Bora. 2022. « Development of high refractive index polydimethylsiloxane waveguides doped with benzophenone via solvent-free fabrication for biomedical pressure sensing ». Photonics, vol. 9, nº 8.

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Abstract

We present the fabrication and characterization of elastomeric optical waveguides, to be used for the manufacture of a conformable, water-resistant, and cost-effective pressure sensor that is amenable to the development of smart wearable health monitoring devices. To achieve this goal, high- sensitivity polydimethylsiloxane waveguides with a rectangular cross-section were fabricated. A new up-doping procedure, to tailor the refractive index of the ensuing waveguides, was experimentally developed using benzophenone additives. With this method we demonstrated a high refractive index change (up to +0.05) as a linear function of the benzophenone doping concentration. Propagation losses of about 0.37 dB/cm in the visible range and a high sensitivity to transverse compression of 0.10%/dB optical power loss were measured. It was also shown that one can further control the refractive index of the waveguide core and cladding regions through proper selection of the polydimethylsiloxane base to curing agent mixing ratio.

Item Type:	Peer reviewed article published in a journal
Professor:	Professor Petit, Yvan Lina, Jean-Marc Ung, Bora
Affiliation:	Génie mécanique, Génie électrique, Génie électrique
Date Deposited:	13 Sep 2022 16:13
Last Modified:	12 Oct 2022 15:56
URI:	https://espace2.etsmtl.ca/id/eprint/25186

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