Vyatkin
Michael Vyatkin, Fryazino RU
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20110064097 | Single-mode high power multimode fiber laser system - A high power single mode fiber laser system is configured with an active fiber including coextending multimode core (MM) and cladding around the MM core. The MM core is doped with one or more ions selected from rare earth and transitional metals and has a bottleneck cross in accordance with one aspect of the disclosure. The bottleneck cross-section includes a relatively small uniformly dimensioned input end region, a frustoconical region and a relatively large uniformly dimensioned amplifying region. The refractive step index of the MM core is configured with a central dip shaped and dimensioned along the input region so as not to disturb a Gaussian field profile of fundamental mode, gradually transform the Gaussian field profile into the ring profile of the fundamental mode and support the latter along the amplifying region. In accordance with a further aspect, the core is further provided with an output transforming region with the dip which gradually shapes the ring field profile in the Gaussian field profile further distortlessly supported by the output end region. A variety of end and side pumping arrangements are employed with the structures configured in accordance with the first and second aspects. | 03-17-2011 |
Mikhail Vyatkin, Fryazino RU
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20120269209 | Single Mode High Power Fiber Laser System - A high power single mode fiber laser system has a monolithic active fiber configured with a double bottleneck-shaped multimode (MM) core which is capable of supporting substantially only a fundamental mode at a given wavelength. The core has opposite uniformly configured end regions, frustoconical transformer regions running inwards from the respective end regions, and a central uniformly-dimensioned region which bridges the transformer regions. The MM core is configured with a refractive step-index profile which includes a continuous dip configured to shape an intensity field of the fundamental mode from a Gaussian or dome-shaped field profile to a two-peak-shaped profile and back to the Gaussian filed profile. | 10-25-2012 |
20140286362 | High Power Neodymium Fiber Lasers and Amplifiers - A fiber block is configured with a fiber block including a Nd-doped active fiber and a pump-light delivery fiber which has a stretch extending along the active fiber in a side-to-side configuration so as to lunch pump light into the Nd-doped core of the active fiber. The core of the active fiber is surrounded by at least one or more claddings which, like the core, have a double bottleneck cross-section with a relatively large-area central region and relatively small input and output regions. The pump light delivery fiber is structured to have a substantially dumbbell cross-section with a relatively small-area central region coextending with the central region of the active fibers. The active fiber is dimensioned so that the overall length of the active fiber is configured to provide for the maximal amplification of the laser signal in a 900 nm range while limiting amplification in the 1060 nm range to the preset threshold. The fiber block is further configured so as to have the major fraction of the unabsorbed light, supported in the relatively large-area output end region of the passive fiber, be further used for pumping a neighboring fiber block. | 09-25-2014 |
20140314105 | Fiber with Asymmetrical Core and Method for Manufacturing Same - An optical active fiber is configured with an asymmetrically-shaped core having at least one long axis and a shortest axis which extends transversely to the long axis. The outmost cladding of the active fiber is configured with a marking indicating the orientation of the short axis. The marking allows for bending the fiber so that the shortest axis extends along and lies in the plane of the bend thereby minimizing distortion of a mode which is guided by the asymmetrically-shaped core as light propagates along the bend. | 10-23-2014 |
Mikhall Vyatkin, Fryazino RU
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20110064095 | Single Mode High Power Fiber Laser System - A monolithic fiber is configured with a double bottleneck-shaped multimode (MM) core capable of supporting substantially only a fundamental mode at a given wavelength and having opposite end regions, frustoconically shaped transformer regions, which run inwards from the respective end regions, and a central uniformly dimensioned region, which bridges the transformer regions. The MM core has a refractive step-index profile which is configured with a centrally positioned dip having a variable width along the length of the fiber. The width of the dip is relatively small at the end regions of the MM core so as to support only the fundamental mode with a Gaussian profile. As the dip becomes larger along the input transformer region, it gradually shapes the Gaussian profile into the ring profile of the fundamental mode, which is guided along the central region of the MM core. The dip gradually becomes smaller along the output transition region so as to shape the ring profile back into the substantially Gaussian profile of the fundamental mode radiated from the output end region of the MM core. The refractive index profile has a ring area doped with one or more rare-earth elements and configured to amplify substantially only the fundamental mode. | 03-17-2011 |
Mikhall Vyatkin, Fruazino RU
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20130034326 | Single Mode High Power Fiber Laser System - A monolithic fiber has a double bottleneck-shaped core configured with opposite uniformly configured end regions, frustoconical transformer regions which run inwards from the respective end regions, and a central uniformly-dimensioned region which bridges the transformer regions. The core is configured as a multimode core or single-mode core and capable of guiding a single transverse mode between the end regions without splice losses. | 02-07-2013 |
Valeriy Vyatkin, Glenfield NZ
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20140143419 | CONTROL OF NETWORKS - The invention provides a network of devices and a set of processors which control and/or monitor these devices by executing code defining a data-model for the network. This data-model incorporates a set of logical-nodes encapsulating network function and/or network devices, and are arranged in a hierarchy for centralised control and/or monitoring. Each logical-node includes a service-module having a set of connections for service-events and can store and/or update service-data objects, with service-events and service-data objects conforming to types defined by a network standard. Each logical-node also includes an intelligence-module having connections to exchange intelligence-events with other intelligence-modules and being operable to participate in intelligence-operations distributed across multiple intelligence-modules, and may generate service-intelligence-data defining service-events for one or more service-modules. | 05-22-2014 |