Accession Number : ADD014629

Title :   Tapered Fiber Amplifier.

Descriptive Note : Patent, Filed 31 Aug 88, patented 17 Jul 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Russell, Stephen D ; Stamnitz, Timothy C

Report Date : 17 Jul 1990

Pagination or Media Count : 6

Abstract : A tapered optical fiber amplifier is designed to provide for long-distance, un-repeatered fiber optic communications. Two single-mode fiber portions are tapered to efficiently intensify and couple an information signal from a laser diode and a pump signal at a shorter wavelength into a fused, tapered single-mode fiber optic coupler. The concentrated information signal and concentrated pump signal are combined via the coupler which is coupled to a several-kilometer length of a relatively small core diametered single-mode fiber to create nonlinear optical effect (stimulated Raman scattering) (SRS). The SRS causes Raman shift of the pump light into the small core diametered single-mode fiber length, thereby generating SRS to result in a signal amplification and an efficient extraction of the amplified signal via the tapered output fiber portion or pigtail. Patents. (rrh)

Descriptors :   *PATENTS, *OPTICAL PUMPING, *AMPLIFIERS, *FIBER OPTICS, TRANSMISSION LINES, TAPER, NONLINEAR SYSTEMS, RAMAN SPECTRA, SCATTERING

Subject Categories : Fiber Optics and Integrated Optics
      Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE