- https://doi.org/10.1007/978-1-4419-8907-9_139
High-visibility two-photon interference in femtosecond pulse pumped type-II SPDC
- Jan 1, 2003
- Yoon-Ho Kim +4 more
Summary form only given. By far the most efficient source of two-particle entangled state is spontaneous parametric downconversion (SPDC). Especially, cw laser pumped type-II SPDC has been widely treated as a good source of entangled photon pairs, since one can easily prepare a polarization Bell state. However, femtosecond pulse pumped type-II SPDC shows poor quantum interference visibility when a thick crystal is used. To restore the visibility, one has to use narrow-band spectral filters at the expense of available photon flux. We demonstrate a scheme for high-visibility two-photon interference with thick (3.4 mm.) type-II BaB/sub 2/O/sub 4/ (BBO) crystals in femtosecond pulse pumped SPDC. Polarization Bell states can be prepared using this method without spectral and amplitude post-selection.
- # Spontaneous Parametric Downconversion
- # High-visibility Two-photon Interference
- # Polarization Bell State
- # Narrow-band Spectral Filters
- # Thick Crystal
- # Photon Flux
- # Two-particle State
- # Poor Visibility
- # type-II Spontaneous Parametric Downconversion
- # Two-particle Entangled State
