Fiber devices with transverse-pressure-controlled squeezers

Details Fiber devices with transverse-pressure-controlled squeezers Fiber devices with transverse-pressure-controlled squeezers

2005-03-29

2005-03-29

Palmer, Phan T. H. (Department: 2874)

Optical waveguides

Accessories

External retainer/clamp

C385S009000, C385S011000, C385S140000

Reexamination Certificate

active

06873783

ABSTRACT:
Implementations of a polarization control method and apparatus are provided. In one implementation, a device uses super-polished squeezing surfaces to apply pressure against a polyimide coated fiber thereby minimizing micro-bending effects that cause losses in the fiber. Special control circuitry may be used to maintain a driving source of piezo-electrics that control the squeezing surfaces at a resonant frequency, thereby minimizing the voltages needed to drive the piezo-electrics.

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patent: 6707977 (2004-03-01), Chien et al.
“Active Stabilization of Polarisation on a Single-Mode Fibre”, Electronics Letters, Apr. 26, 1984, vol. 20, No. 9, pp. 365-366.
Mark Johnson, “In-Line Fiber-Optical Polarization transformer”, Applied Optics, May 1, 1979, vol. 18, No. 9, pp. 1288-1289.
H. Shimizu, S. Yamazaki, T. Ono, and K. Emura, “Highly Practical Fiber Squeezer Polarization Controller” Journal of Lightwave Technology, Oct. 1991, vol. 9, No. 10, pp. 1217-1224.
“Endless Polarisation Conrtrol in Coherent Optical Communications” Electronics Letters, Jul. 17, 1986, vol. 22, No. 15, pp. 772-773 and 1207.
R. Noe, H. Heidrich, and D. Hoffmann, “Endless Polarization Control Systems for Coherent Optics”, Journal of Lightwave Technology, Jul. 1988, vol. 6, No. 7, pp. 1199-1206.

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