| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Spectrum Analysis of a Pulsed Photon Source Generated from Periodically Poled Lithium Niobate |
| FANG Bin, LIU Bi-Heng, HUANG Yun-Feng**, SHI Bao-Sen, GUO Guang-Can
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Key Lab of Quantum Information, University of Science and Technology of China, Hefei 230026
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| Cite this article: |
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FANG Bin, LIU Bi-Heng, HUANG Yun-Feng et al 2011 Chin. Phys. Lett. 28 074212 |
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Abstract We present a theoretical and experimental study on the bandwidth of parametric down-converted photons generated from periodically poled lithium niobate (PPLN) crystal pumped by a pulsed laser. By comparison of crystals with different lengths and pump beams of different bandwidths, we demonstrate that the bandwidth of down-converted photons will increase for a broader bandwidth of pump pulse and decrease for a longer crystal, but the influence of crystal length will become weaker along with increase of both crystal length and pump pulse bandwidth. Especially under the conditions of our experiment, the bandwidth almost remains unchanged for longer crystals when pumped by a femtosecond laser. This may be helpful for schemes in which pulsed lasers are used to pump PPLN crystals.
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| Keywords:
42.50.Dv
42.65.Lm
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Received: 30 January 2011
Published: 29 June 2011
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| PACS: |
42.50.Dv
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(Quantum state engineering and measurements)
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42.65.Lm
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(Parametric down conversion and production of entangled photons)
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