Noise reduction in resonator-based ultrasound sensors by using a CW laser and phase detection

Lucas Riobó, Yoav Hazan, Francisco Veiras, María Garea, Patricio Sorichetti, Amir Rosenthal

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

ملخص

The detection of ultrasound via optical resonators is conventionally performed by tuning a continuous-wave (CW) laser to the linear slope of the resonance and monitoring the intensity modulation at the resonator output. While intensity monitoring offers the advantage of simplicity, its sensitivity is often limited by the frequency noise of the CW laser. In this work, we develop an alternative CW technique that can significantly reduce measurement noise by monitoring variations in the phase, rather than intensity, at the resonator output. In our current implementation, which is based on a balanced Mach–Zehnder interferometer for phase detection, we demonstrate a 24-fold increase in the signal-to-noise ratio of the detected ultrasound signal over the conventional, intensity-monitoring approach.

اللغة الأصليةالإنجليزيّة
الصفحات (من إلى)2677-2680
عدد الصفحات4
دوريةOptics Letters
مستوى الصوت44
رقم الإصدار11
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 1 يونيو 2019

All Science Journal Classification (ASJC) codes

  • !!Atomic and Molecular Physics, and Optics

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