Abstract

We report generation of pulsed twin beams of light through optical parametric amplification in a fiber Sagnac loop. By pumping the Sagnac loop with picosecond pulses at a wavelength near the zero-dispersion wavelength of the fiber, we achieve phase-matched nondegenerate four-wave mixing with gain. For a gain of 2.2, the intensity noises of the amplified signal and the generated idler (conjugate) pulses are found to be correlated by 5.0  dB, and the subtracted noise drops below the shot-noise limit by 1.1  dB (2.6  dB when corrected for losses). We have investigated the gain dependence of the quantum-noise reduction as well as of the intensity noises of the amplified signal and idler pulses. As the gain increases, we observe the onset of excess noise on the idler pulses.

© 2001 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]

1999 (1)

1998 (2)

D. Boschi, S. Branca, F. De Martini, L. Hardy, and S. Popescu, Phys. Rev. Lett. 80, 1121 (1998).
[CrossRef]

W. Tittel, J. Brendel, H. Zbinden, and N. Gisin, Phys. Rev. Lett. 81, 3563 (1998).
[CrossRef]

1997 (1)

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Z. Zeilinger, Nature 390, 575 (1997).
[CrossRef]

1996 (1)

1995 (2)

1990 (1)

O. Aytür and P. Kumar, Phys. Rev. Lett. 65, 1551 (1990).
[CrossRef]

1982 (2)

R. H. Stolen and J. E. Bjorkholm, IEEE J. Quantum Electron. 18, 1062 (1982).
[CrossRef]

C. M. Caves, Phys. Rev. D 26, 1817 (1982).
[CrossRef]

1972 (1)

R. H. Stolen, E. P. Ippen, and A. R. Tynes, Appl. Phys. Lett. 20, 62 (1972).
[CrossRef]

Aytür, O.

O. Aytür and P. Kumar, Phys. Rev. Lett. 65, 1551 (1990).
[CrossRef]

Bergman, K.

Bjorkholm, J. E.

R. H. Stolen and J. E. Bjorkholm, IEEE J. Quantum Electron. 18, 1062 (1982).
[CrossRef]

Boschi, D.

D. Boschi, S. Branca, F. De Martini, L. Hardy, and S. Popescu, Phys. Rev. Lett. 80, 1121 (1998).
[CrossRef]

Bouwmeester, D.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Z. Zeilinger, Nature 390, 575 (1997).
[CrossRef]

Branca, S.

D. Boschi, S. Branca, F. De Martini, L. Hardy, and S. Popescu, Phys. Rev. Lett. 80, 1121 (1998).
[CrossRef]

Brendel, J.

W. Tittel, J. Brendel, H. Zbinden, and N. Gisin, Phys. Rev. Lett. 81, 3563 (1998).
[CrossRef]

Caves, C. M.

C. M. Caves, Phys. Rev. D 26, 1817 (1982).
[CrossRef]

De Martini, F.

D. Boschi, S. Branca, F. De Martini, L. Hardy, and S. Popescu, Phys. Rev. Lett. 80, 1121 (1998).
[CrossRef]

Eibl, M.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Z. Zeilinger, Nature 390, 575 (1997).
[CrossRef]

Gisin, N.

W. Tittel, J. Brendel, H. Zbinden, and N. Gisin, Phys. Rev. Lett. 81, 3563 (1998).
[CrossRef]

Hardy, L.

D. Boschi, S. Branca, F. De Martini, L. Hardy, and S. Popescu, Phys. Rev. Lett. 80, 1121 (1998).
[CrossRef]

Harvey, J. D.

Haus, H. A.

Ippen, E. P.

K. Bergman, H. A. Haus, E. P. Ippen, and M. Shirasaki, Opt. Lett. 19, 290 (1996).
[CrossRef]

R. H. Stolen, E. P. Ippen, and A. R. Tynes, Appl. Phys. Lett. 20, 62 (1972).
[CrossRef]

Kumar, P.

D. K. Serkland and P. Kumar, Opt. Lett. 24, 92 (1999).
[CrossRef]

O. Aytür and P. Kumar, Phys. Rev. Lett. 65, 1551 (1990).
[CrossRef]

Leonhardt, R.

Mattle, K.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Z. Zeilinger, Nature 390, 575 (1997).
[CrossRef]

Mirioka, T.

Mori, K.

Murdoch, S. G.

Pan, J. W.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Z. Zeilinger, Nature 390, 575 (1997).
[CrossRef]

Popescu, S.

D. Boschi, S. Branca, F. De Martini, L. Hardy, and S. Popescu, Phys. Rev. Lett. 80, 1121 (1998).
[CrossRef]

Saruwatari, M.

Serkland, D. K.

Shirasaki, M.

Stolen, R. H.

R. H. Stolen and J. E. Bjorkholm, IEEE J. Quantum Electron. 18, 1062 (1982).
[CrossRef]

R. H. Stolen, E. P. Ippen, and A. R. Tynes, Appl. Phys. Lett. 20, 62 (1972).
[CrossRef]

Tittel, W.

W. Tittel, J. Brendel, H. Zbinden, and N. Gisin, Phys. Rev. Lett. 81, 3563 (1998).
[CrossRef]

Tynes, A. R.

R. H. Stolen, E. P. Ippen, and A. R. Tynes, Appl. Phys. Lett. 20, 62 (1972).
[CrossRef]

Weinfurter, H.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Z. Zeilinger, Nature 390, 575 (1997).
[CrossRef]

Zbinden, H.

W. Tittel, J. Brendel, H. Zbinden, and N. Gisin, Phys. Rev. Lett. 81, 3563 (1998).
[CrossRef]

Zeilinger, A. Z.

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Z. Zeilinger, Nature 390, 575 (1997).
[CrossRef]

Appl. Phys. Lett. (1)

R. H. Stolen, E. P. Ippen, and A. R. Tynes, Appl. Phys. Lett. 20, 62 (1972).
[CrossRef]

IEEE J. Quantum Electron. (1)

R. H. Stolen and J. E. Bjorkholm, IEEE J. Quantum Electron. 18, 1062 (1982).
[CrossRef]

Nature (1)

D. Bouwmeester, J. W. Pan, K. Mattle, M. Eibl, H. Weinfurter, and A. Z. Zeilinger, Nature 390, 575 (1997).
[CrossRef]

Opt. Lett. (4)

Phys. Rev. D (1)

C. M. Caves, Phys. Rev. D 26, 1817 (1982).
[CrossRef]

Phys. Rev. Lett. (3)

O. Aytür and P. Kumar, Phys. Rev. Lett. 65, 1551 (1990).
[CrossRef]

D. Boschi, S. Branca, F. De Martini, L. Hardy, and S. Popescu, Phys. Rev. Lett. 80, 1121 (1998).
[CrossRef]

W. Tittel, J. Brendel, H. Zbinden, and N. Gisin, Phys. Rev. Lett. 81, 3563 (1998).
[CrossRef]

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Figures (3)

Fig. 1
Fig. 1

Schematic of the experimental setup. M1–M3, mirrors. See text for other definitions.

Fig. 2
Fig. 2

Measured quantum-noise reduction as a function of the FWM gain, along with the predicted curve based on Eq.  (1) for η=0.49 (solid curve). The dashed curve represents a fit of the data to Eq.  (3) with A=0.15. The inset shows a typical FWM optical spectrum.

Fig. 3
Fig. 3

Measured noise above shot noise as a function of the FWM gain for the amplified signal (open squares) and the idler (filled squares) pulses. The solid curve is a plot of Eq.  (2) for η=0.49, and the dashed curve is a plot including the excess noise.

Equations (3)

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R=ΔI^2/ΔI^C2=1-η+η/2g-1,
ΔI^SI2/ΔI^SI,C2=2ηg-1+1,
R=ΔI^2/ΔI^C2=1-η+η/2g-1+Ag-1,

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