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Review of Scientific Instruments / Volume 82 / Issue 7 / ARTICLES / General Instruments

Rev. Sci. Instrum. 82, 075113 (2011); http://dx.doi.org/10.1063/1.3610455 (7 pages)

A scalable, self-analyzing digital locking system for use on quantum optics experiments

B. M. Sparkes, H. M. Chrzanowski, D. P. Parrain, B. C. Buchler, P. K. Lam, and T. Symul

Centre for Quantum Computation and Communication Technology, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia

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(Received 19 May 2011; accepted 20 June 2011; published online 27 July 2011)

Digital control of optics experiments has many advantages over analog control systems, specifically in terms of the scalability, cost, flexibility, and the integration of system information into one location. We present a digital control system, freely available for download online, specifically designed for quantum optics experiments that allows for automatic and sequential re-locking of optical components. We show how the inbuilt locking analysis tools, including a white-noise network analyzer, can be used to help optimize individual locks, and verify the long term stability of the digital system. Finally, we present an example of the benefits of digital locking for quantum optics by applying the code to a specific experiment used to characterize optical Schrödinger cat states.

© 2011 American Institute of Physics

Article Outline

  1. INTRODUCTION
    1. Digital control for quantum optics experiments
    2. Control Theory
  2. DIGITAL CONTROLLER DESIGN
    1. Hardware
    2. Software
  3. LOCKING ANALYSIS
    1. Lock optimization
    2. Long term stability and comparison with Analog PI controller
  4. QUANTUM MEASUREMENTS
  5. CONCLUSIONS

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KEYWORDS and PACS

Keywords

digital control, quantum optics

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3610455

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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