Polarization-preserving optical fiber

Details Polarization-preserving optical fiber Polarization-preserving optical fiber

1979-11-06

1981-06-23

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 3A, 65 13, 65 18, 350 9630, 350 9631, C03B 3700, C03C 2502

Patent

active

042748542

ABSTRACT:
A method of making a polarization-preserving optical fiber is disclosed having a first step of fabricating a substrate tube to have a wall of nonuniform thickness, the nonuniformity in thickness being arranged about the wall of the substrate tube so that maxima and minima in wall thickness lie in planes which are substantially orthogonal. This first step is followed by deposition of cladding layers and a core layer within the substrate tube. The substrate is then collapsed and the fiber drawn therefrom. The nonuniform wall thickness of the substrate tube operates together with differential thermal contraction of the layers to produce stress-induced birefringence in the fiber, which birefringence provides a polarization-preserving optical fiber.

REFERENCES:
patent: 3535017 (1970-10-01), Miller
patent: 3554721 (1971-01-01), Gardner
patent: 3585540 (1971-06-01), Scholfloffel
patent: 3646472 (1972-02-01), Cooper et al.
patent: 3879182 (1975-04-01), Strack
patent: 3930714 (1976-01-01), Dyoff
patent: 3932162 (1976-01-01), Blankenship
patent: 4046537 (1977-09-01), Deserno et al.
patent: 4087266 (1978-05-01), Irven et al.
patent: 4106847 (1978-08-01), Arnaud
Bell System Tech. Jour., "B. S. T. J. Brief-A New Optical Fiber", Kaiser et al., pp. 265-269, 2/1973.
Netherlands "Optical Waveguide For Use in Production of Non-Linear Optical Effects", No. 7510685, 3/1976.
Lens Like Medium Using a Diffused Composite-Elliptic Core Iga et al., Proceedings of IEEE 6/1975, pp. 988-989.

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