Abstract:
Method and apparatus for producing metal-coated optical fiber involves providing a length of optical fiber having a glass fiber with or without a carbon layer surrounded by a liquid-soluble polymeric coating. The optical fiber is passed through a series of solution baths such that the fiber will contact the solution in each bath for a predetermined dwell time, the series of solution baths effecting removal of the polymer coating and subsequent electroless plating of metal on the glass fiber. The optical fiber is collected after metal plating so that a selected quantity of the metal-coated optical fiber is gathered, Preferably, the glass fiber passes through the series of solution baths without contacting anything except for the respective solution in each.
Abstract:
Dans ce dispositif, les dimensions transverses de la fibre (10) varient longitudinalement et ses deux extrémités (12, 14) ont des paramètres opto-géométriques adaptés pour qu'à la longueur d'onde du faisceau, la fibre ait un mode fondamental ayant deux profils de formes différentes au niveau des deux extrémités. Ainsi, en injectant le faisceau (24) avec l'un des profils par l'une des deux extrémités, il en ressort par l'autre extrémité avec l'autre profil dont la forme est différente de celle du profil du faisceau injecté.
Abstract:
Integrated optical waveguide evanescent field sensor for sensing of chemical and/or physical quantities, comprising a substrate carrying a waveguide layer structure provided with - a waveguide core layer (3) sandwiched between two cladding layers (4, 5) formed by a lower (4) and a upper cladding layer (5), of a lower refractive index than the waveguide core layer, - a sensing section comprising a sensing layer (10) included in the upper cladding layer, wherein said sensing layer is exchangeable as a separate element.
Abstract:
A method and a related apparatus for optical imaging in particular for performing three-dimensional surface measurements. The apparatus comprises a double-clad or a multi-clad fibre. Several varieties of transmitting the light through the fibre to the sample and collecting the light reflected from the sample in the fibre are disclosed.
Abstract:
A double-clad fiber extends along an axis of a catheter. The fiber has a core and an annular cladding surrounding the core. A lens assembly has a first sub-aperture in optical communication with the core and a second sub-aperture in optical communication with the annular cladding.
Abstract:
The present invention provides an optical fiber (2) suitable for the manufacture of optical fiber couplers and having low bend loss, low splice loss, and low attenuation. The optical fibers (2) according to one aspect of the invention have bending loss of less than 0.5 dB at 1560 nm when wrapped 5 turns around a 20 mm mandrel; and an average fiber pull test loss of less than 0.1 dB in the wavelength range of 1530 nm to 1550 nm. The present invention also includes optical fiber (2) components made from these optical fibers.
Abstract:
The invention relates to optical fibers, and systems containing optical fibers. The invention provides an optical fiber that includes a core (110), a cladding (120), a region (130a, 130b, 130c, 130d) and a layer (140) that surrounds and contacts cladding (120). The core (110) enhances pump energy absorption by interacting with pump energy at a desired wavelength and the cladding confines the pump energy at wavelength so that the pump energy can propagate along the fiber and can interact with core (110).
Abstract:
An optical waveguide fiber or body having a doped outer region which can be utilized in an optical coupler, a preform which can serve as the precursor for the fiber, an optical coupler, and methods of making same. Water, for example in the form of H>2 2
Abstract:
An optical transmission fiber for use in a metropolitan or access network is disclosed. The transmission line includes a fiber being single mode at a first operating wavelength of around 1310 nm and a second operating wavelength of around 1550 nm. The dispersion of the fiber is negative at one of the first and second operating wavelengths and positive at the other of the first and second operating wavelengths, with an absolute value of between about 5 ps/nm/km and 15 ps/nm/km. The fiber also has a zero dispersion wavelength that is located between the first and second operating wavelengths, and an effective area at a wavelength around 1550 nm greater than about 60 mu m . The cabled fiber has a cutoff wavelength less than about 1300 nm. The fiber allows wavelength division multiplexing (WDM) operation in both the bands (1310 nm and 1550 nm) by reducing nonlinear effects such as four-wave mixing (FWM).