Optical fibre amplifier

Details Optical fibre amplifier Optical fibre amplifier

1993-05-20

1996-04-30

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

385 27, G02B 626

Patent

active

055130330

ABSTRACT:
An optical fibre amplifier in which a length of optically amplifying fibre is spliced between a pair of 2.times.2 tapered fused fibre couplers each constructed from a length of amplifier type profile fibre and a length of transmission type profile fibre. In each coupler, one of two constituent fibres has been pre-stretched so as to match the propagation constants of the two fibres within the coupling region of that coupler.

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patent: 4963832 (1990-10-01), Desurvire et al.
patent: 5077817 (1991-12-01), Shang
patent: 5171345 (1992-12-01), Takemura
patent: 5175778 (1992-12-01), Nourshargh et al.
Takeuchi et al., "Coupler Type Multi/Demultiplexer Composed of Different Parameter Fibres", Electronics Letters, vol. 27, No. 7, 28 Mar. 1991, pp. 575-576.
Minelly et al, "Wavelength Combining Fused-Taper Couplers With Low Sensitivity To Polarisation For Use . . . etc.," Electronic Letters, vol. 26, No. 8, 14 Apr. 1990, pp. 523-524.
Gonthier et al, "2.times.2 Multiplexing Couplers For All-Fibre 1.55 .mu.m Amplifiers and Lasers", Electronics Letters, vol. 27, No. 1, 3 Jan. 1991, pp. 42-43.
Wilkinson et al., "Close-Spaced Fused Fibre Wavelength Division Multiplexers With Very Low Polorisation Sensitivity," Electronics Letters, vol. 26, No. 6, 15 Mar. 1990, pp. 382-384.
Wada, et al., "High Efficiency Erbium-Doped Fiber Amplifier Using Mode Field Diameter Adjusting Technique", Jul. 1991 second topical meeting on optical amplifiers held in Snowmass Village, CO, pp. 258/FD 3-1 to 261/FD 3-4.

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