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Vol. 184, Issue 1, January 2015, pp. 123-129




Photonic Amorphous Piín/pin SiC Optical Filter Under Controlled Near UV Irradiation

1-3 Manuela Vieira, 1, 2 Manuel Augusto Vieira, 1 Isabel Rodrigues, 1, 2 Vitor Silva, 1, 2 Paula Louro

1 Telecommunication and Computer Dept. ISEL, R. Conselheiro EmŪdio Navarro, 1959-007 Lisboa, Portugal
2 CTS-UNINOVA, Quinta da Torre, Monte da Caparica, 2829-516, Caparica, Portugal
3 DEE-FCT-UNL, Quinta da Torre, Monte da Caparica, 2829-516, Caparica, Portugal
1 Tel.: +351218317150, fax: +351218317144

E-mail: mv@isel.ipl.pt


Received: 14 November 2014 /Accepted: 15 December 2014 /Published: 31 January 2015

Digital Sensors and Sensor Sysstems


Abstract: In this paper, we present a wavelength selector based on a monolithic multilayer piín/pin a-SiC:H optical filter that requires appropriate near-ultraviolet steady states optical switches to select the desired wavelengths in the visible-near infrared (VIS-NIR) ranges. Results show that the background intensity works as a selector in the infrared/visible regions, shifting the sensor sensitivity. Low intensities select the NIR range while high intensities select the visible part. Here, the optical gain is very high in the red range, decreases in the green range, and stays near one in the blue region decreasing strongly in the near-ultraviolet range. The transfer characteristics effects due to changes in steady state light intensity and wavelength backgrounds are presented. The relationship between the optical inputs and the output signal is established.


Keywords: Integrated optical filter, VIS-NIR communications, Photonics-based sensors, Optoelectronics


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