Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects
Q 30.69: Poster
Tuesday, March 18, 2014, 16:30–18:30, Spree-Palais
A new source of pseudothermal light — •Thomas Mehringer1,2, Steffen Oppel1,2, and Joachim von Zanthier1,2 — 1Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, 91058 Erlangen — 2Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91052 Erlangen
In the last years various multiphoton interference experiments have been performed using thermal light sources [1,2]. So far, the standard method to generate pseudothermal light relies on a coherent laser beam illuminating a rotating ground glass disk [3,4]. Here we propose a new method to produce pseudothermal light based on a common multimode fiber. If excited by a coherent laser the light of the many modes of the fiber interferes in the far field behind the fiber creating the same speckle pattern and photon statistics as the standard pseudothermal source. Making use of the flexibility of the new device we present multiphoton interferences with up to four pseudothermal light sources.
[1] S. Oppel, T. Büttner, P. Kok, J. von Zanthier, Superresolving Multiphoton Interferences with Independent Light Sources, Phys. Rev. L. 109, 233603 (2012)
[2] J. H. Shapiro, R. W. Boyd, The physics of ghost imaging, Quantum. Inf. Process. 4, 949 (2012)
[3] W. Martienssen, E. Spiller, Coherence and Fluctuations in Light Beams, Am. J. Phys. 32, 919--926 (1964)
[4] L.E. Estes, M. Lorenzo, M. Narducci, R.A.Tuft, Scattering of Light from a Rotating Ground Glass, J. Opt. Soc. Am. 61, 1301 (1971)