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Phys Rev Lett. 2007 Feb 9;98(6):063602. Epub 2007 Feb 5.

Chirp and compress: toward single-cycle biphotons.

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Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.


The Letter describes a technique for the spontaneous generation of chirped time-energy entangled photons. Transmitting either photon through an appropriate dispersive medium results in a temporally compressed, transform limited biphoton. At maximum bandwidth, the biphoton is a single cycle in length, with a waveform that has the same characteristic shape as a classical single-cycle pulse.

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