Abstract

A novel configuration for measuring femtosecond polarization mode dispersion (PMD) with a π-shifted Sagnac interferometer is studied. The advantages of this configuration include a response that is independent of the orientation of the device under test. This independence allows characterization of the first- and second-order PMD by measurement of the wavelength dependence of the differential group delay and of the orientation of the device’s principal states of polarization. The method provides an extension of the dynamic range of the Sagnac interferometer technique to few-femtosecond PMD measurement.

© 2002 Optical Society of America

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References

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B. Olson, M. Karlson, and P. Andreson, IEEE Photon. Technol. Lett. 10, 997 (1998).
[CrossRef]

1995

1994

C. D. Poole and D. L. Favin, J. Lightwave Technol. 12, 917 (1994).
[CrossRef]

1993

1989

D. Mortimer, J. Lightwave. Technol. 6, 1217 (1989).
[CrossRef]

1988

Andreson, P.

B. Olson, M. Karlson, and P. Andreson, IEEE Photon. Technol. Lett. 10, 997 (1998).
[CrossRef]

Birks, T. A.

Claus, R. O.

Fang, X.

Favin, D. L.

C. D. Poole and D. L. Favin, J. Lightwave Technol. 12, 917 (1994).
[CrossRef]

Gordon, J. P.

Heffner, B. I.

Jopson, R. M.

Karlson, M.

B. Olson, M. Karlson, and P. Andreson, IEEE Photon. Technol. Lett. 10, 997 (1998).
[CrossRef]

Kogelnik, H.

Morenas, V.

Morkel, P.

Mortimer, D.

D. Mortimer, J. Lightwave. Technol. 6, 1217 (1989).
[CrossRef]

Nelson, L. E.

Olson, B.

B. Olson, M. Karlson, and P. Andreson, IEEE Photon. Technol. Lett. 10, 997 (1998).
[CrossRef]

Pennickx, D.

Poole, C. D.

C. D. Poole and D. L. Favin, J. Lightwave Technol. 12, 917 (1994).
[CrossRef]

Appl. Opt.

IEEE Photon. Technol. Lett.

B. Olson, M. Karlson, and P. Andreson, IEEE Photon. Technol. Lett. 10, 997 (1998).
[CrossRef]

J. Lightwave Technol.

C. D. Poole and D. L. Favin, J. Lightwave Technol. 12, 917 (1994).
[CrossRef]

J. Lightwave. Technol.

D. Mortimer, J. Lightwave. Technol. 6, 1217 (1989).
[CrossRef]

Opt. Lett.

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Figures (5)

Fig. 1
Fig. 1

Configuration of the π-shifted Sagnac interferometer.

Fig. 2
Fig. 2

Calculated DGD for the fiber-optic coupler from measured intensity in arm 1 of the π-shifted Sagnac interferometer.

Fig. 3
Fig. 3

Calculated DGD for the fiber-optic coupler from measured intensity in arm 2 of the π-shifted Sagnac interferometer.

Fig. 4
Fig. 4

Calculated DGD for the fiber-optic coupler from the JME.

Fig. 5
Fig. 5

Orientation of the DUT’s birefringence axes calculated with the π-shifted Sagnac interferometer in conjunction with a conventional Sagnac interferometer. Dark curve, calculated from measurements in arm 1, light curve, calculated from arm 2.

Equations (7)

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dΩωdω=dΔτdωq^+Δτdq^dω,
JDUTω=Q-1ωDDUTωQω,
DDUTω=expiδω200exp-iδω2, Qω=cos αωsin αω-sin αωcos αω,
E1nout=Kn1/21-Kn1/2JaωE1nin+Kn1/21-Kn1/2JcωE1nin, E2nout=KnJaωE1nin+1-KnJcωE1nin,
JHWPc=i cos 2ρi sin 2ρi sin 2ρ-i cos 2ρ,    JHWPa=i cos 2ρ-i sin 2ρ-i sin 2ρ-i cos 2ρ, JDUTc=expiδ2cos2 α+exp-iδ2sin2 α2i sin 2α sinδ22i sin 2α sinδ2exp-iδ2cos2 α+expiδ2sin2 α,JDUTa=expiδ2cos2 α+exp-iδ2sin2 α-2i sin 2α sinδ2-2i sin 2α sinδ2exp-iδ2cos2 α+expiδ2sin2 α,
Tλ=cos2δλ2sin2 2ρ.
Tλ=sin2δλ2sin2 2α.

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