Marco Pizzocaro

Publications (3)3.6 Total impact

• Article: Active disturbance rejection control of temperature for ultrastable optical cavities.

  Marco Pizzocaro, Davide Calonico, Claudio Calosso, Cecilia Clivati, Giovanni Costanzo, Filippo Levi, Alberto Mura
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  ABSTRACT: This paper describes the application of a novel active disturbance rejection control (ADRC) to the stabilization of the temperature of two ultra-stable Fabry-Perot cavities. The cavities are 10 cm long and entirely made of ultralow- expansion glass. The control is based on a linear extended state observer that estimates and compensates the disturbance in the system in real time. The resulting control is inherently robust and easy to tune. A digital implementation of ADRC gives a temperature instability of 200 μK at one day of integration time.
  IEEE transactions on ultrasonics, ferroelectrics, and frequency control 02/2013; 60(2):273-80. · 1.80 Impact Factor
• Article: A Large Area Fiber Optic Gyroscope on multiplexed fiber network

  Cecilia Clivati, Davide Calonico, Giovanni A. Costanzo, Alberto Mura, Marco Pizzocaro, Filippo Levi
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  ABSTRACT: We describe a fiber optical gyroscope based on the Sagnac effect realized on a multiplexed telecom fiber network. Our loop encloses an area of 20 km^2 and coexists with Internet data traffic. This Sagnac interferometer achieves a sensitivity of about 1e-8 (rad/s)/sqrt(Hz), thus approaching ring laser gyroscopes without using narrow-linewidth laser nor sophisticated optics. The proposed gyroscope is sensitive enough for seismic applications, opening new possibilities for this kind of optical fiber sensors
  12/2012;
• Article: Realization of an ultrastable 578-nm laser for an Yb lattice clock.

  Marco Pizzocaro, Giovanni Costanzo, Aldo Godone, Filippo Levi, Alberto Mura, Marco Zoppi, Davide Calonico
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  ABSTRACT: In this paper, we describe the development of an ultrastable laser source at 578 nm, realized using frequency sum generation. This source will be used to excite the clock transition (1)S(0) - (3)P(0) in an ytterbium optical lattice clock experiment. Two independent ultrastable lasers have been realized, and the laser frequency noise and stability have been characterized.
  IEEE transactions on ultrasonics, ferroelectrics, and frequency control 03/2012; 59(3):426-31. · 1.80 Impact Factor