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 30.9: Poster

Tuesday, March 18, 2014, 16:30–18:30, Spree-Palais

A cascaded monolithic Fabry-Pérot filter system for single photon quantum optics — •Christoph Berkemeier, Andreas Ahlrichs, Benjamin Sprenger, and Oliver Benson — AG Nano Optics, Institut für Physik, HU Berlin

A long-term stable filter system[1] has been set up with an effective free spectral range of several hundred GHz at a full width half maximum of 200 MHz. The filter system consists out of two monolithic Fabry-Pérot filters[2]. It has been used to filter a single mode of a cavity-enhanced parametric down-conversion source to test case its high resolution filtering capabilities. The comb-like frequency spectrum was accurately resolved and shown to be in high accordance with theory[3].
In a second experiment the indistinguishability of the filtered photon pairs was verified with the Hong-Ou-Mandel effect, which could be measured with a visibility of 96 %. This also shows that undesired birefringence, which is often encountered with monolithic cavities, can be avoided by stress-free mounting.

[1] Ahlrichs et al., Appl. Phys. Lett. 103, 241110 (2013)

[2] Palittapongarnpim et al., Rev. Sci. Instrum. 83, 066101 (2012)

[3] M. Scholz et al., Opt. Commun. 282, 3518 (2009)