Turbulence-free interference induced by the turbulence itself | Zendy

Thomas A. Smith | Zendy; Yanhua Shih | Zendy

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Turbulence-free interference induced by the turbulence itself

Author(s) -

Thomas A. Smith,

Yanhua Shih

Publication year - 2020

Publication title -

apl photonics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.094

H-Index - 34

ISSN - 2378-0967

DOI - 10.1063/5.0031474

Subject(s) - physics , turbulence , interference (communication) , photon , optics , interferometry , turbulence kinetic energy , mechanics , channel (broadcasting) , electrical engineering , engineering

When a laser beam is incident on a double-slit interferometer without turbulence, the classic Young’s double-slit interference is present in the first-order measurement of the mean photon number (or intensity), while the second-order measurement of photon number fluctuation correlation (or intensity fluctuation correlation) yields a trivial constant. When optical turbulence is introduced, it destroys the classic interference present in the measurement of the photon number; however, two-photon interference appears in the measurement of photon number fluctuation correlation. This interesting observation means that the observed two-photon interference is not only observable through turbulence, i.e., turbulence-free, but also induced by the turbulence itself. Turbulence-free two-photon interference induced by the turbulence itself allows for interferometric sensing through strong turbulence when coherent radiation, such as a laser, is applied.

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