Polarization-dependent optical fibre amplifier

Details Polarization-dependent optical fibre amplifier Polarization-dependent optical fibre amplifier

2006-10-10

2006-10-10

Wood, Kevin S. (Department: 2874)

Optical waveguides

Optical fiber waveguide with cladding

C385S126000

Reexamination Certificate

active

07120339

ABSTRACT:
An optical fibre including a waveguide and at least one stress applying region is described. The waveguide is defined by a numerical aperture, and the stress applying region is defined by a depressed refractive index. The optical fibre is configured such that the waveguide supports at least two polarised fundamental modes, two polarized first second-order modes, and two polarised second second-order modes. The waveguide includes comprises a gain medium. The stress applying region, the waveguide and the disposition of the gain medium are such as to provide preferential guidance to at least one of the modes at an operating wavelength.

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patent: WO 00/02290 (2000-01-01), None
“Suppression of Stimulated Brillouin Scattering by Intentionally Induced Periodical Residual-Strain in Single-Mode Optical Fibers”, IEICE Transactions on Communications, Tokyo, JP, vol. E76-B, No. 4, Apr. 1, 1993, pp. 345-350, XP000378264, ISSN: 0916-8516.
M. P. Varnham, et al.; “Single-polarisation operations of highly birefringement bow-tie optical fibres”, Electronics Letters, UK, vol. 19, No. 7, Mar. 31, 1983, pp. 246-247, XP02269184, ISSN 0013-5194.
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Malcolm Paul Varnham, A Study of Highly Birefringent Optical Fibres, PhD Thesis, Apr. 1984, Chapter 6, pp. 84-138, University of Southampton, Southampton, UK.

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