Nonclassical 2-photon interference with separate intrinsically narrowband fibre sources.
نویسندگان
چکیده
In this paper, we demonstrate a source of photon pairs based on four-wave-mixing in photonic crystal fibres. Careful engineering of the phase matching conditions in the fibres enables us to create photon pairs at 597 nm and 860 nm in an intrinsically factorable state showing no spectral correlations. This allows for heralding one photon in a pure state and hence renders narrow band filtering obsolete. The source is narrow band, bright and achieves an overall detection efficiency of up to 21% per photon. For the first time, a Hong-Ou-Mandel interference with unfiltered photons from separate fibre sources is presented.
منابع مشابه
Quantum interference in two-photon excitation with squeezed and coherent fields
Two-photon excitation of a three-level atom in a ladder configuration (1→2→3) by simultaneous illumination with fields in squeezed vacuum and coherent states results in quantum interference for the excitation process. The particular configuration considered here is one for which the signal and idler output fields of a subthreshold nondegenerate optical parametric oscillator are in resonance wit...
متن کاملExperimental interference of independent photons.
Interference of photons emerging from independent sources is essential for modern quantum-information processing schemes, above all quantum repeaters and linear-optics quantum computers. We report an observation of nonclassical interference of two single photons originating from two independent, separated sources, which were actively synchronized with a rms timing jitter of 260 fs. The resultin...
متن کاملar X iv : 0 90 3 . 10 90 v 1 [ qu an t - ph ] 5 M ar 2 00 9 Interference contrast in multi - source few photon optics
Many recent experiments employ several parametric down conversion (PDC) sources to get multiphoton interference. Such interference has applications in quantum information. We study here how effects due to photon statistics, misalignment, and partial distinguishability of the PDC pairs originating from different sources may lower the interference contrast in the multiphoton experiments. PACS num...
متن کاملDispersion in Femtosecond Entangled Two-Photon Interference
Significant consideration has recently been given to the process of spontaneous parametric down-conversion in nonlinear crystals pumped by cw lasers [1–4]. The nonclassical properties of entangled two-photon light generated by this process have been used in many experimental schemes to elucidate distinctions between the predictions of classical and quantum physics [5]. Coincidence-count measure...
متن کاملA single-crystal source of path-polarization entangled photons at non-degenerate wavelengths.
We demonstrate a bright, narrowband, compact, quasi-phase-matched single-crystal source generating path-polarization-entangled photon pairs at 810 nm and 1550 nm at a maximum rate of 3 x 10(6) s(-1) THz(-1) mW(-1) after coupling to single-mode fiber, and with two-photon interference visibility above 90%. While the source can already be used to implement quantum communication protocols such as q...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Optics express
دوره 17 6 شماره
صفحات -
تاریخ انتشار 2009