Periodically poled lithium niobate LiNbO3 waveguides (PPLN-WGs) are investigated via a home-made computer code to perform efficient frequency conversion of lightwave, through the quasi-phase matching (QPM) of the modes propagating at the fundamental and second harmonic wavelengths. The design goal consists in obtaining a temperature sensors having high immunity to electromagnetic noise. A sophisticated sensor, made by two PPLN-WGs with suitable gratings of inverted ferroelectric domains and employing phase-shifters and mirrors is designed and refined. A sensitivity S ≅ 0.2 mW/°C in the temperature range from 345 °C to 435 °C is simulated by using the input power equal to 2 W at the fundamental wavelength

High Performance Temperature Sensor

CALO', Giovanna;D'ORAZIO, Antonella;PETRUZZELLI, Vincenzo;PRUDENZANO, Francesco;
2004

Abstract

Periodically poled lithium niobate LiNbO3 waveguides (PPLN-WGs) are investigated via a home-made computer code to perform efficient frequency conversion of lightwave, through the quasi-phase matching (QPM) of the modes propagating at the fundamental and second harmonic wavelengths. The design goal consists in obtaining a temperature sensors having high immunity to electromagnetic noise. A sophisticated sensor, made by two PPLN-WGs with suitable gratings of inverted ferroelectric domains and employing phase-shifters and mirrors is designed and refined. A sensitivity S ≅ 0.2 mW/°C in the temperature range from 345 °C to 435 °C is simulated by using the input power equal to 2 W at the fundamental wavelength
2004 URSI EMTS, International Symposium on Electromagnetic Theory
9788884922526
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11589/14368
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