Abstract:
An optical transmission and amplification system includes a multichannel transmission span with a length of a multicore transmission fiber having a plurality of individual transmission cores. A first tapered multicore coupler provides connectivity between the plurality of transmission cores of the multicore fiber and a respective plurality of individual transmission leads. A fiber amplifier is provided having a plurality of individual cores including at least one pump core and a plurality of amplifier core. A second tapered multicore coupler provides connectivity between the amplifier cores of the fiber amplifier and a respective plurality of amplifier leads, and between the at least one pump core and a respective pump lead.
Abstract:
Provided is an optical coupler, which can allow the light to be branched off by the required amount when necessary, and a method of branching light using the optical coupler. Optical coupler 1 has optical fiber 10 that has small-diameter part 12, which is formed so as to have a relatively small outer diameter at a portion in the longitudinal direction, and that branches off the transmitted light by small-diameter part 12; and output optical fiber 20 that receives the light branched off from input optical fiber 10. Small-diameter part 12 of input optical fiber 10 is caused to contact with linear small-diameter part 22 of output optical fiber 20; a coupling length, which is the length along which small-diameter part 12 of input optical fiber 10 and small-diameter part 22 of output optical fiber 20 are made to contact with each other, or a propagation constant of the optical fibers is varied; and thus, branching ratio S of the light branched off from input optical fiber 10 into output optical fiber 20 is varied.
Abstract:
Fibre coupler for creation of optical fibre-containing interferometers (sensors), with at least two parallel optical fibres placed in an enclosure characterized in that each of the optical fibres consists of at least three alternately placed light-conductive sections with different coatings, at least one (1) of which has a melting point above 200°C, and the two corresponding sections (2) with coating other than with a melting point above 200°C are coupled using any known method. Interferometer containing above described fibre couplers, where the fibre couplers are interconnected by at least two optical fibre sections (8, 9) with a high temperature-resistant coating.
Abstract:
The inventions relates to a method for manufacturing an asymmetric coupling arrangement (20) for coupling light of one second wavelength from a single mode pump fibre at the pump wavelength (2) into a single mode signal fibre at the signal wavelength (8), - wherein the single mode pump fibre at the pump wavelength (2) and the single mode signal fibre at the signal wavelength (8) are different from one another, - wherein the method comprises the following steps: a) pre-tapering the single mode pump fibre at the pump wavelength (2) or the signal fibre at the signal wavelength (8) according to a predetermined pre-taper parameter in order to arrive at matched propagation constants for the two fibres at either the signal or the pump wavelength; b) connecting the pump fibre (2) and the signal fibre (8), preferably by fusion.
Abstract:
A fibre-optic package comprises at least two fibre optic devices or components (102, 104, 106, 118, 120, 122, 124) coupled together by fused-fibre coupling. The package typically comprises two or more fibre optic accelerometers, and may be of reduced size compared to fibre-optics packages of the prior art, due to the reduced length of optical fibre required to connect the devices or components.
Abstract:
A fiber-optic coupler packaging including an internal encapsulation for encapsulating a fiber-optic coupler, the refraction index of the internal encapsulation is smaller than the refraction index of the fiber-optic coupler, and an external encapsulation, for encapsulating the internal encapsulation, the refraction index of the external encapsulation is greater than the refraction index of the internal encapsulation, the internal encapsulation and the external encapsulation are substantially transparent to the range of wavelengths of the light traveling inside the fiber-optic coupler.