Integrated acousto-optical temperature sensor
FIBER AND INTEGRATED OPTICS, 25 (6):
387-402 (2006)DOI: 10.1080/01468030600910731
Abstract
In this work, we investigate the performance of a novel integrated
acousto-optical temperature sensor fabricated in LiNbO3 and operating
with ultrashort light pulses ( 2 ps). Five parameters ( time duration,
bandwidth, time intensity maximum, frequency intensity maximum, and
output energy on the output pulse converted for the TM mode, as a
function of temperature) were observed for the switched pulse at the
output of the sensor ( TM mode) with and without the presence of an
increasing linear self-phase modulation (SPM) profile. Comparing all
analyzed parameters, one can conclude that the pulse intensity is
presenting the larger variation (100.09%) as a function of the
temperature change (24.5 to 400 degrees C) in a configuration without
profile. Considering the increasing linear SPM profile, all the analyzed
parameters are presenting a significant increase in the percentile
variations in the studied range of temperature ( 24.5 to 400 degrees C).
Comparing all the five parameters, in two configurations ( with and
without the use of linear SPM profile), one can conclude that the time
intensity maximum showed to be the most suitable parameter as
measurement to be accomplished in a schematic detection for the
temperature sensing in the range 24.5 to 400 degrees C. We can conclude
that the sensitivity of the AOTS is improving in the configuration with the increasing nonlinearity profile (beta = 2) and for higher
temperature.