Shot Noise for 1550 nm Laser using Balanced Homodyne Detection

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Abstract

Abstract

Single photon detectors are indispensable for secure communication in quantum cryptography. Shot noise, a fundamental limit to photodetection occurs due to discreteness of photons. Shot noise plays an important role in telecommunications and optical science because of its property of setting a practical limit to the signal-to-noise ratios. In order to implement BB84 protocol, there is a need to assess appropriate lower bound on experimental errors caused during secure key distribution between Alice and Bob. Shot noise limit can be measured using balanced homodyne detection. In this paper, balanced homodyne detection for measuring shot noise of 1550 nm laser has been implemented and validated.

 

Keywords: Shot Noise, Balanced Homodyne detection, 1550nm, laser, signal

Cite this Article

Shikhar Singh. Shot Noise for 1550 nm Laser using Balanced Homodyne Detection. Research & Reviews: Journal of Physics. 2020; 9(1): 47–50p.

References

Fox, M., 2006. Quantum optics: an introduction (Vol. 15). OUP Oxford.

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Xu, Q., Mondragón, A.A., Gallion, P. and Mendieta, F.J., 2009. Homodyne in-phase and quadrature detection of weak coherent states with carrier phase tracking. IEEE Journal of Selected Topics in Quantum Electronics, 15(6), pp.1581-1590.

Hans-A. Bachor, Timothy C. Ralph. A Guide to Experiments in Quantum Optics Second, Revised and Enlarged Edition, WILEY-VCH, ISBN 10: 3527403930

/ISBN 13: 9783527403936

Appel, J., Hoffman, D., Figueroa, E. and Lvovsky, A.I., 2007. Electronic noise in optical homodyne tomography. Physical Review A, 75(3), p.035802.

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Published

2020-05-29

Issue

Vol. 9 No. 1 (2020)

Section

Research Article

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