Patent application number | Description | Published |
20090135409 | Optical waveguide rotator mechanism, birefringence-inducing element and polarization control devices employing either or both and methods of using same - A fiber rotator mechanism for rotating a portion of an optical waveguide, specifically an optical fiber, about a longitudinal axis thereof comprises a motor having a tubular rotor through which the fiber extends, in use, and to which the fiber is secured, directly or indirectly. An optical fiber may be secured by means of a device which also compresses the optical fiber to induce a required birefringence, conveniently by means of a spring-loaded clamping device or a ferrule of shape memory material. | 05-28-2009 |
20090268197 | Method and apparatus for identification of multiple fibers using an OTDR - In order to simplify and expedite identification of fibers (DF | 10-29-2009 |
20110293267 | METHOD AND APPARATUS FOR TESTING TRANSMISSION LINES NORMALLY PROPAGATING OPTICAL SIGNALS - Portable apparatus for measuring parameters of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S | 12-01-2011 |
20120134667 | All-Optical, Phase Sensitive Optical Signal Sampling - An optical sampling arrangement for high-speed measurement of the time-varying electric field of an optical input signal utilizes coherent mixing of the optical input signal with a reference laser source in a phase-diverse optical hybrid solution, followed by optical sampling of the coherently-mixed fields at the output of the optical hybrid. The generated streams of optical samples are then detected and signal processed in order to reconstruct a sampled version of the electric field of the original optical input signal. | 05-31-2012 |
20120189238 | UNBALANCED MACH-ZEHNDER INTERFEROMETER AND MODULATOR BASED THEREUPON - There are provided an unbalanced Mach-Zehnder interferometer and a modulator based thereupon. The interferometer comprises a loop comprising a plurality of cascaded segments of polarization-maintaining fibers, into which an input signal is split such that two light portions of the split signal propagate concurrently in mutually opposite directions along the loop; and a first optical arrangement between a first and a second segment of the loop for rearranging the axes of propagation of the two light portions such that, on at least a one segment, the two light portions propagate along mutually orthogonal polarization axes of the polarization-maintaining fiber. The light portions are then recombined to mutually interfere. Birefringence of the segment(s) where the light portions propagate on mutually orthogonal polarization axes then provides a differential path length of the interferometer. An unbalanced Mach-Zehnder modulator is obtained by inserting a phase modulator within the loop. | 07-26-2012 |
20130330071 | CHARACTERIZATION OF NON-ASE NOISE ON OPTICAL SIGNALS - There is provided a method for determining a noise parameter characterizing an optical Signal-Under-Test (SUT) having a signal contribution, an Amplified Spontaneous Emission (ASE) noise contribution and a non-ASE optical noise contribution, such as a carrier-leakage contribution or a depolarized-signal contribution, within an optical-signal bandwidth. The method comprises acquiring optical spectrum trace(s) of the SUT, discriminating at least the non-ASE optical noise contribution from the ASE-noise contribution using the optical spectrum trace(s) and/or a trace obtained from the optical spectrum trace(s); and determining the noise parameter using discriminated non-ASE optical noise contribution and/or the discriminated ASE-noise contribution. | 12-12-2013 |
20140327735 | PORTABLE DIGITAL HOLOGRAPHIC PROBE FOR THE INSPECTION OF OPTICAL FIBER CONNECTORS, AND INSPECTION SYSTEM AND METHOD FOR THE SAME - A portable inspection probe for the inspection of a recessed mating surface of an optical fiber connector is provided. In one variant, the portable inspection probe includes a digital holographic detection module operable to digitally record a hologram of the recessed mating surface, and a rigid probe tip configured to be optically coupled to the digital holographic detection module and shaped to provide optical access to the recessed mating surface. In another variant, the portable inspection probe is to be used with a rigid probe tip connectable thereto, and the digital holographic detection module includes a probing optical assembly not traversed by a reference beam and configured to direct an object beam onto the recessed mating surface and to collect the object beam upon reflection thereof by the recessed mating surface. An inspection system and an inspection method are also provided. | 11-06-2014 |
20140363157 | METHOD AND APPARATUS FOR TESTING TRANSMISSION LINES NORMALLY PROPAGATING OPTICAL SIGNALS - A portable apparatus for measuring parameters of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S | 12-11-2014 |