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Control of Intensity drive of a Cavity QED System

Control of Intensity drive of a Cavity QED System J. O. Gómez 1,2 , B. D. Patterson 1 , A. D. Cimmarusti 1 , W. M. Pimenta 1,3 , and L. A. Orozco 1 1 JQI, Dept. Physics and NIST, University of Maryland, College Park, MD 20742, USA.

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Control of Intensity drive of a Cavity QED System

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  1. Control of Intensity drive of a Cavity QED System J. O. Gómez1,2, B. D. Patterson1, A. D. Cimmarusti1, W. M. Pimenta1,3, and L. A. Orozco1 1JQI, Dept. Physics and NIST, University of Maryland, College Park, MD 20742, USA. 2Facultad de CienciaseInstituto de CienciasNucleares, Universidad Autonoma de Mexico, Mexico DF, Mexico. 3Universidad Federal de Minas Gerais, Bello Horizonte, MG, Brazil. Work supported in part by the JQI and by the NSF through grant 0969257

  2. PID Control Loop We use Arduino to collect and process the information

  3. Motorized Rotation Stage

  4. Results

  5. Conclusions We wereable to reduce the fluctuations of the light using the feedback loop by a factor of 3.7 as measured by the coefficient of variation defined as the ratio of the standard deviation divided by the mean.

  6. References A D Cimmarusti, C A Schroeder, B D Patterson, L A Orozco, P Barberis-Blostein and H J Carmichael. “Control of conditional quantum beats in cavity QED: amplitudedecoherence and phaseshifts”. New J. Phys. 15, 023002 (2013). Mikhailov, Eugeny E. College of William & Mary. “Chapter 11 Feedback and PID ControllTheory”. As dowloadedonAugust 4, 2013 http://physics.wm.edu/~evmik/classes/2011_spring_Physics_252_Analog_Electronics/#toc25 Thorlabs. “PRM1Z8 MotorizedRotationStage Manual”. As downloadedonAugust 4, 2013. http://www.thorlabs.com/Thorcat/19700/PRM1Z8-Manual.pdf

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