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Updated: Jun 13, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Enhancing image contrast using coherent states and photon number resolving detectors
A J Pearlman1, A Ling, E A Goldschmidt
1Joint Quantum Institute, University of Maryland, College Park, MD 20742, USA.
Optics Express
|April 15, 2010
Summary
Photon-number-resolving detectors reveal strong beam profile compression at high photon numbers. This enhances contrast for resolving closely spaced Airy disk beams, improving optical measurements.
Area of Science:
- Optics and photonics
- Quantum optics
Background:
- Diffraction-limited beams are fundamental in optical systems.
- Characterizing beam profiles is crucial for optical performance.
- Conventional irradiance profiles can limit resolution for closely spaced beams.
Purpose of the Study:
- To experimentally map the transverse profile of diffraction-limited beams.
- To investigate the effect of photon number on beam profile characteristics.
- To assess the potential for improved resolution in optical measurements.
Main Methods:
- Utilized photon-number-resolving detectors for precise beam profiling.
- Experimentally mapped transverse beam profiles under varying photon detection conditions.
- Analyzed beam profile compression and contrast.
Main Results:
- Observed significant compression of diffracted beam profiles with increasing detected photon number.
- Demonstrated higher contrast between closely spaced Airy disk beams compared to conventional irradiance profiles.
- Showcased the potential for resolving beams separated by the Rayleigh criterion.
Conclusions:
- Photon-number-resolving detection enables enhanced characterization of diffraction-limited beams.
- The observed beam compression effect offers a novel method for improving optical resolution.
- This technique has implications for advanced optical metrology and imaging systems.
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