Birefringent electromagnetic transmission line that preserves th

Details Birefringent electromagnetic transmission line that preserves th Birefringent electromagnetic transmission line that preserves th

1980-07-31

1983-02-08

Lee, John D.

350 9633, G02B 5172

Patent

active

043726461

ABSTRACT:
A method of fabrication and the resulting structure for a birefringent transmission line having particular application as an optical waveguide. The instant transmission line is fabricated so as to be adapted to maintain the state (e.g. the polarization vector) of polarized electromagnetic radiation propagating therethrough. Birefringence in the instant transmission line is geometrically generated by producing oblong regions having different indices of refraction through a cross-section of the transmission line. A preferred technique by which to generate birefringence includes the method step of bombarding the transmission line with a supply of atomic particules, such as energetic hydrogen ions, whereby to implant a damaged region of oblong cross-section and thereby cause an internal swelling therein. By way of a preferred example, the transmission line herein described may be a single-mode optical fiber.

REFERENCES:
patent: 4179189 (1979-12-01), Kaminow et al.
patent: 4274854 (1981-06-01), Pleibel et al.
patent: 4307938 (1981-12-01), Dyott
Schineller et al., "Optical Waveguides Formed by Proton Irradiation of Fused Silica," J.O.S.A., vol. 58, No. 9, Sep. 1968, pp. 1171-1176.
Standley et al., "Properties of Ion-Bombarded Fused Quartz . . . ," Applied Optics, vol. 11, No. 6, Jun. 1972, pp. 1313-1316.
Il'in et al., "Ion Bombardment of Insulators and Its Application . . . ," Sov. J. Opt. Tech., vol. 39, No. 12, Dec. 1972, pp. 771-777.
Houghton et al., "Optical Waveguides Formed by Low-Energy Electron Irradiation of Silica," Appl. Phys. Lett., vol. 29, No. 9, Nov. 1976, pp. 565-566.

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