• Corpus ID: 119206490

Selecting the pre-detection characteristics for effective fiber coupling of entangled photon sources

@article{Anwar2016SelectingTP,
  title={Selecting the pre-detection characteristics for effective fiber coupling of entangled photon sources},
  author={Ali Anwar and P. Chithrabhanu and Salla Gangi Reddy and Nijil Lal and R. P. Singh},
  journal={arXiv: Quantum Physics},
  year={2016}
}
Photon modes have an important role in characterizing the quantum sources of light. Proper coupling of various photon modes obtained in spontaneous parametric down conversion (SPDC) process in optical fibers is essential to generate an effective source of entangled photons. The two main pre-detection factors affecting the biphoton mode coupling in SPDC are the pump beam focusing parameter and the crystal thickness. We present the numerical and experimental results on the effect of pump focusing… 
View PDF on arXiv

Figures from this paper

References

SHOWING 1-10 OF 31 REFERENCES

On the measurement of two-photon single-mode coupling efficiency in parametric down-conversion photon sources

Photon-based quantum information schemes have increased the need for light sources that produce individual photons, with many such schemes relying on optical parametric down-conversion (PDC).…

Effects of crystal length on the angular spectrum of spontaneous parametric downconversion photon pairs

We present a theoretical and experimental analysis of the joint effects of the transverse electric field distribution and of the nonlinear crystal characteristics on the properties of photon pairs…

Optimal photon-pair single-mode coupling in narrow-band spontaneous parametric downconversion with arbitrary pump profile

A theoretical investigation of the performance of single-mode coupled spontaneous parametric downconversion sources is proposed, which only requires very few assumptions of practical interest:…

Optimal collinear Gaussian beams for spontaneous parametric down-conversion

I investigate the properties of spontaneous parametric down-conversion (SPDC) involving co-linear Gaussian spatial modes for the pump and the photon collection optics. Approximate analytical and…

Measurement of coupling PDC photon sources with single-mode and multimode optical fibers

We investigate the coupling efficiency of parametric downconversion light (PDC) into single and multi-mode optical fibers as a function of the pump beam diameter, crystal length and walk-off. We…

A wavelength-tunable fiber-coupled source of narrowband entangled photons.

It is demonstrated that, due to the particular geometry of the setup, the signal and idler wavelengths can be tuned over a wide range without loss of entanglement.

Vacuum effects on interference in two-photon down conversion.

  • OuWangMandel
  • Physics
    Physical review. A, General physics
  • 1989
This experiment could be used to look for locality violations along the lines recently proposed by Grangier, Potasek, and Yurke, but without the need for a coherent reference beam for homodyning.

Parametric interaction of focused Gaussian light beams

A theoretical study is presented on the optimization of second harmonic generation (SHG) and parametric generation (PG) by a laser beam in a uniaxial nonlinear crystal. Numerically computed curves…

Control of the shape of the spatial mode function of photons generated in noncollinear spontaneous parametric down-conversion

We show experimentally how the spatial shape of the pump beam controls the ellipticity of the spatial mode function in noncollinear spontaneous parametric down-conversion. The degree of ellipticity…

Direct generation of three-photon polarization entanglement

Non-classical states of light are of fundamental importance for emerging quantum technologies. All optics experiments producing multi-qubit entangled states have until now relied on outcome…