1945 results about "Single fiber" patented technology

An inlet device is described for inserting a cable containing optical fibers into a telecommunications enclosure. The inlet device includes a housing with a strength member securing section configured to fasten at least one strength member to the housing. The inlet device further includes a fiber guide device. The inlet device may be used in a single fiber optical cable assembly or multi-fiber optical cable assembly. A method for preparing a cable assembly is also described. A telecommunications enclosure including an inlet device is also described.

A new optical sensing device containing fiber Bragg gratings, a scanning bandpass filter, an interferometer and multiple photodetectors is disclosed. The present invention also describes a new system and method for fibre Bragg grating (FBG) sensor interrogation and multiplexing. The new system combines a scanning Fabry-Perot (SFP) bandpass filter used to wavelength-multiplex multiple gratings in a single fiber, and an unbalanced Mach-Zehnder fibre interferometer made with a 3x3 coupler to detect strain-induced wavelength shifts. A passive technique for interferometer drift compensation using non-sensing FBGs is included in the system. A complete prototype system interrogates four gratings in a single fiber at a Nyquist sampling rate up to 10 kHz, with a noise floor measured near 4 nepsilon Hz<-1 / 2 >above 0.1 Hz. The inclusion of the interferometer drift compensation technique is shown to make quasi-static measurements feasible.

A new transform is disclosed, applying methods of group theory, with which the composition of a voxel of three channels comprising isotropic, single fiber and multiple fiber components can be determined, as well as the magnitude and orientation of the diffusion field. Asymmetries produced by experimental artifacts fall into channels distinct from the fiber channels, allowing their separation and a subsequent reduction in noise from the reconstructed fibers.

The invention is an optoelectronic (OE) crossbar switch (10) for both digital and analog signals, used either separately or combined, whose functions are reconfigurable and distributed. The invention allows multiple senders to be connected with multiple receivers simultaneously. The invention uses optical filters for wavelength division multiplexing and demultiplexing (WDM and WDD). A single fiber module input / output port carries multiple bi-directional signals that are optically filtered out in the module using WDM / WDD filters (12) at each sender / receiver and then selected after optical filtering using photodiode detectors (15) as detectors and switches. Laser transmitters (14), photodiode detectors (15), and smart electronics (18) are used to implement the crossbar switch functions. In addition to optical filters, the use of time division multiplexing (TDM) and code division multiple access (CDMA) implemented either electrically or optically are taught to increase the number of independent users that the distributed switch handles. The switch can be cascaded with other switches using optical bridging circuits (100) to create a scaleable interconnect fabric. An arbitration technique can be used which allows signals to be sent only when the intended receiver is capable of accepting these signals.

An apparatus and method applicable for generating ultraviolet laser light having a wavelength in the 200-nm range and / or 250-nm range; in some embodiments, using a single fiber laser pump source (in some embodiments, a pulsed source). In some embodiments, the invention provides methods of generating 250-nm or 200-nm photons using a mode-locked 1000-nm fiber laser and efficient 4th / 5th harmonic frequency up-conversion. In other embodiments, the invention uses continuous wave (cw) single-frequency fiber lasers and external resonant frequency conversion. In still other embodiments, the invention uses cw single-frequency optically-pumped semiconductor lasers (OPSLs) and electrically driven vertical-cavity surface-emitting lasers (VCSELs) and externally resonant frequency conversion. All of these produce both of the ultraviolet wavelengths of interest