TEM{sub 10} homodyne detection as an optimal small-displacement and tilt-measurement scheme

Journal Article · Wed Nov 15 04:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.053823· OSTI ID:20979353

Delaubert, V ^[1]; Treps, N; Fabre, C ^[1]; Lassen, M ^[2]; Harb, C C; Lam, P K; Bachor, H-A ^[2]

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1. Laboratoire Kastler Brossel, 4 Place Jussieu, Case 74, Paris 75252 Cedex 05 (France)
2. ACQAO, Australian National University, Canberra ACT 0200 (Australia)

We present a detailed description of small displacement and tilt measurements of a Gaussian beam using split detectors and TEM{sub 10} homodyne detectors. Theoretical analysis and an experimental demonstration of measurements of these two conjugate variables are given. A comparison between the experimental efficiency of each scheme proves that the standard split detection is only 64% efficient relative to the TEM{sub 10} homodyne detection, which is optimal for beam displacement and tilt. We also demonstrate experimentally that squeezed light in the appropriate spatial modes allows measurements beyond the quantum noise limit for both types of detectors. Finally, we explain how to choose the detection scheme best adapted to a given application.

• OSTI ID: 20979353
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BEAMS
COMPARATIVE EVALUATIONS
DETECTION
EFFICIENCY
GAUSS FUNCTION
LASERS
NOISE
STANDARDS
VISIBLE RADIATION