Double pin photodiodes with two optical gate connections for light triggering: Two-phototransistor model

Manuel A. Vieira, Manuela Vieira, João Costa, Paula Louro, Miguel Fernandes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Light-activated multiplexer/demultiplexer siliconcarbon devices are analyzed. An electrical model for the device operation is presented and used to compare output signals with experimental data. An algorithm that takes into accounts the voltage and the optical bias controlled sensitivities are developed. The device is a double pi'n/pin a-SiC:H heterostructure with two optical gate connections for light triggering in different spectral regions. Multiple monochromatic pulsed communication channels were transmitted together, each one with a specific bit sequence. The combined optical signal was analyzed by reading out, under different applied voltages and optical bias, the generated photocurrent across the device. Experimental and simulated results show that the output multiplexed signal has a strong nonlinear dependence on the light absorption profile, i.e., on the incident light wavelength, bit rate and intensity under unbalanced light generation of carriers. By switching between positive and negative voltages the input channels can be recovered or removed.

Original languageEnglish
Title of host publicationProceedings - 1st International Conference on Sensor Device Technologies and Applications, SENSORDEVICES 2010
Pages135-139
Number of pages5
DOIs
Publication statusPublished - 1 Dec 2010
Event1st International Conference on Sensor Device Technologies and Applications, SENSORDEVICES 2010 - Venice, Italy
Duration: 18 Jul 201025 Jul 2010

Conference

Conference1st International Conference on Sensor Device Technologies and Applications, SENSORDEVICES 2010
CountryItaly
CityVenice
Period18/07/1025/07/10

Keywords

  • Electrical simulation
  • Optical communications
  • Optical sensors
  • Wavelength division multiplexingdemultiplexing

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  • Cite this

    Vieira, M. A., Vieira, M., Costa, J., Louro, P., & Fernandes, M. (2010). Double pin photodiodes with two optical gate connections for light triggering: Two-phototransistor model. In Proceedings - 1st International Conference on Sensor Device Technologies and Applications, SENSORDEVICES 2010 (pp. 135-139). [5632124] https://doi.org/10.1109/SENSORDEVICES.2010.32