Optoelectronic multiplexer for digital data processing based on liquid crystal pixels and optical fiber elements

• Autorzy: Perez I. , Pena J. M. S. , Torres J. C. , Manzanares R. , Marcos C. , Vazquez C.
• Języki publikacji: EN

Abstrakty

EN

In this work, we present an optoelectronic digital multiplexer 4:1 based on a multipixel nematic liquid crystal cell. This device uses two optical control signals to select one among four possible optical data inputs. These data signals are generated by four red LEDs, which are guided through plastic optical fiber towards liquid crystal pixels. For our purpose, only four pixels of the cell will be used to modulate the optical signal across them. Each pixel will be addressed by a square waveform coming from the conditioning circuit managed by a microcontroller system. The electronic control allows the multiplexer to work as simple two input logical gates such as AND, NAND, OR, NOR, XOR and XNOR. The operation time of the device is limited by the response time of LC cell that is in the

Słowa kluczowe

EN

optoelectronic digital multiplexer; optical logic gate; liquid crystal; digital processing

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2007
• Tom: Vol. 15, No. 2
• Strony: 78--81
• Opis fizyczny: Bibliogr. 5 poz., wykr.

Twórcy

autor

Perez I.

autor

Pena J. M. S.

autor

Torres J. C.

autor

Manzanares R.

autor

Marcos C.

autor

Vazquez C.

• Grupo de Displays y Aplicaciones Fotónicas, Dpto. Tecnologia Electrónica, Universidad Carlos III, Butarque 15, E-28911 Legane;s, Madrid, Spain

Bibliografia

• 1. J.A. Castellano, "Handbook of Display Technology", Academic Press, San Diego, 1992.
• 2. C. Vazquez, J.M.S. Pena, I. Pérez, and S. Vargas, "Optical router for optical fiber sensor networks based on a liquid crystal cell", IEEE Sensors J. 3, 513-518 (2003).
• 3. R.S. McEwen, "Liquid crystals, displays and devices for optical processing", J. Phys. E: Sci. Instrum. 20, 364-377 (1987).
• 4. W. Klaus, Y. Suzuki, M. Tsuchiya, and T. Kamiya, "Accurate predictions of the electrooptic characteristics of homogeneous nematic crystal phase modulators", CLEO'95, Baltimore, 1995.
• 5. L.E.M. Brackenbury, "Multiplexer as a universal computing element for electro-optic logic systems", IEE Proc. 137, 305-310(1990).