Abstract

We report what we believe is the first example of efficient rocking filter formation in polarization-maintaining photonic crystal fiber. Very high coupling efficiencies (as much as -23.5dB suppression of the input polarization) and loss of <0.02 dB were achieved for fibers as short as 11 mm. The filters, which we prepared by periodic mechanical twisting and heating with a scanned CO2 laser beam, are highly compact, and they are expected to be temperature stable.

© 2003 Optical Society of America

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References

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2002 (1)

2000 (1)

1997 (2)

1996 (2)

J. C. Knight, T. A. Birks, P. St. J. Russell, and D. M. Atkin, Opt. Lett. 21, 1547 (1996).
[CrossRef] [PubMed]

D. C. Psaila, F. Ouellette, and C. M. de Sterke, Appl. Phys. Lett. 68, 900 (1996).
[CrossRef]

1993 (1)

1990 (1)

P. St. J. Russell and D. P. Hand, Electron. Lett. 26, 1846 (1990).
[CrossRef]

1984 (1)

Arriaga, J.

Ashkin, A.

Atkin, D. M.

Birks, T. A.

de Sterke, C. M.

D. C. Psaila, F. Ouellette, and C. M. de Sterke, Appl. Phys. Lett. 68, 900 (1996).
[CrossRef]

Dyott, R. B.

R. B. Dyott, Elliptical Fiber Waveguides (Artech House, Boston, Mass., 1995).

Dziedzic, J. M.

Hand, D. P.

P. St. J. Russell and D. P. Hand, Electron. Lett. 26, 1846 (1990).
[CrossRef]

Handerek, V. A.

Kakarantzas, G.

Kanellopoulos, S. E.

Knight, J. C.

Mangan, B. J.

Ortigosa-Blanch, A.

Ouellette, F.

D. C. Psaila, F. Ouellette, and C. M. de Sterke, Appl. Phys. Lett. 68, 900 (1996).
[CrossRef]

Pleibel, W.

Psaila, D. C.

D. C. Psaila, F. Ouellette, and C. M. de Sterke, Appl. Phys. Lett. 68, 900 (1996).
[CrossRef]

Rogers, A. J.

Russell, P. St. J.

Stolen, R. H.

Wadsworth, W. J.

Yariv, A.

A. Yariv and P. Yeh, Optical Waves in Crystals (Wiley, New York, 1984).

Yeh, P.

A. Yariv and P. Yeh, Optical Waves in Crystals (Wiley, New York, 1984).

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Figures (4)

Fig. 1
Fig. 1

Scanning-electron micrograph, showing a cross section of the fiber used in the experiment.

Fig. 2
Fig. 2

Schematic diagram of the experimental setup that we used to fabricate and characterize the rocking filters: L, CO2 laser; M, mirror; MA, motorized attenuator; LN, lens; SM, scanning mirror; FM, fiber mount; RM, rotational motor; P, polarizer; A, analyzer; BLS, broadband LED source; OSA, optical spectrum analyzer.

Fig. 3
Fig. 3

Polarization-coupling spectra for a rocking filter with 1.6° twist angle and 25 coupling steps (periods) (a) in the original state of polarization and (b) in the orthogonal state of polarization. Open circles, experiment; solid curves, theory.

Fig. 4
Fig. 4

Polarization-coupling spectra for a rocking filter with 3.7° twist angle and 12 coupling steps (periods).

Equations (3)

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Pz=κz2 sinc2zκ2+δ2,
Δβ=βx-βy-2π/Λ.
κL=π/2,

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