Corning Incorporated

Stc, Inc

David G Dalgoutte

Scott Robertson Bickham

Michael Vasilyev

James M Grochocinski

Talal I Allos

An apparatus for transporting an optical signal is provided. The apparatus includes sections of optical fiber span with at least one section negative dispersion, negative slope fiber positioned at a distance from the output. A pump light emitting device optically coupled to the optical fiber span near the output is provided for generating an amplification signal.

Dispersion-managed cable for raman-assisted transmission

A dual wavelength reflectometer for single mode fibre is provided with separate lasers (5, 6) with emission wavelengths at 1300 and 1550 nm whose outputs are combined using a single mode optical fibre wavelength multiplexer (7) of tapered coupler format. The combined output is fed to a single mode optical fibre beam splitter (9), also of tapered coupler format, which is constructed to act as a 3 dB splitter for both wavelengths. This beam splitter directs light from the lasers into the fibre under test (10) and back-scattered light from the test fibre n to a photodetector (11).

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Ormskirk, United Kingdom

David G Dalgoutte