Author(s):
Vieira, Manuela ; Vieira, Manuel ; Louro, Paula ; Vaz da Silva, V
Date: 2013
Persistent ID: http://hdl.handle.net/10400.21/2784
Origin: Repositório Científico do Instituto Politécnico de Lisboa
Subject(s): Optical sensors; Short-pass long-pass and band-rejection pass filters; Optical bias control; WDM communication systems in the visible range; Optical sensors; Optical sensors; Short-pass long-pass and band-rejection pass filters; Short-pass long-pass and band-rejection pass filters; Optical bias control; Optical bias control; WDM communication systems in the visible range; WDM communication systems in the visible range
Description
Amorphous SiC tandem heterostructures are used to filter a specific band, in the visible range. Experimental and simulated results are compared to validate the use of SiC multilayered structures in applications where gain compensation is needed or to attenuate unwanted wavelengths. Spectral response data acquired under different frequencies, optical wavelength control and side irradiations are analyzed. Transfer function characteristics are discussed. Color pulsed communication channels are transmitted together and the output signal analyzed under different background conditions. Results show that under controlled wavelength backgrounds, the device sensitivity is enhanced in a precise wavelength range and quenched in the others, tuning or suppressing a specific band. Depending on the background wavelength and irradiation side, the device acts either as a long-, a short-, or a band-rejection pass filter. An optoelectronic model supports the experimental results and gives insight on the physics of the device.
