Patent application number | Description | Published |
20110249940 | OPTICAL BRANCHING DEVICE AND OPTICAL COMMUNICATION SYSTEM INCLUDING THE SAME - The present invention provides an optical branching device and an optical communication system which are easy to connect with optical fibers. In the optical branching device, when light emitted from an optical fiber in a front stage is incident on an entrance port of a multicore optical fiber, the light propagates through a first core and then is distributed from the first core to four second cores by core-to-core crosstalk between the first and second cores. The light beams distributed to the four second cores propagate through the respective cores and are emitted to four optical waveguides optically coupled core-to-core thereto within a fan-out part at exit ports. | 10-13-2011 |
20120224808 | RECEIVING METHOD AND SEPARATING APPARATUS FOR LIGHT OUTPUTTED FROM MULTI-CORE OPTICAL FIBER - According to the present invention, as a result of using a depressed or trench-assisted light-receiving waveguide in which the core is surrounded by a layer having a refractive index lower than that of a cladding as light-receiving means for receiving light outputted from a multi-core optical fiber, the layer of a low refractive index can inhibit the propagation of noise, etc. from the cladding to the core. Consequently, even in cases where the inter-core crosstalk is small, it is possible to accurately measure the inter-core crosstalk since components different from crosstalk-derived components in optical power are reduced. | 09-06-2012 |
20120321253 | METHOD OF CONNECTING OPTICAL FIBER AND CONNECTING STRUCTURE OF OPTICAL FIBER - An optical fiber connecting method and optical fiber connecting structure which can efficiently connect a multicore fiber to a plurality of single-core fibers with high accuracy. The method comprises preparing an MT ferrule for holding an MCF, axially rotating and positioning the MCF with respect to the MT ferrule, and then fixing the MCF to the MT ferrule; preparing an MT ferrule for holding a plurality of SCFs, positioning them such that cores are arranged at respective positions corresponding to arrangements of a plurality of cores in the MCF, and then fixing the plurality of SCFs to the MT ferrule; and positioning and joining the MT ferrules such that the plurality of cores face the respective single cores, so as to connect the MCF to the plurality of SCFs. | 12-20-2012 |
20130302032 | OPTICAL MULTIPLEXER / DEMULTIPLEXER - An optical multiplexer/demultiplexer includes a first fiber unit having an MCF and a GRIN lens, a second fiber unit having an MCF and a GRIN lens, and an optical filter. The optical filter is disposed between the GRIN lens of the first fiber unit and the GRIN lens of the second fiber unit and makes transmitted light and reflected light emitted from a core of the MCFs incident on a core of the MCFs. A leading end of the MCF and one end of the GRIN lens are held in contact with each other in the first fiber unit, while a leading end of the MCF and one end of the GRIN lens are held in contact with each other in the second fiber unit. | 11-14-2013 |
20140050448 | OPTICAL FIBER CABLE - An optical fiber cable is provided as one capable of preventing damage of an inside tube and an outside tube. An optical fiber cable | 02-20-2014 |
20150016795 | OPTICAL COMPONENT AND OPTICAL COMMUNICATION SYSTEM - An optical component according to an embodiment of the present invention is constructed of a plurality of MCFs each having the same core constellation structure and among the plurality of MCFs, a maximum deviation of a core pitch between neighboring cores and a maximum deviation of a spot size of a fundamental mode at an operating wavelength satisfy a specific relation, thereby suppressing structural variation so as to keep a splice loss not more than 1 dB. | 01-15-2015 |
20150093075 | RECEIVING METHOD AND SEPARATING APPARATUS FOR LIGHT OUTPUTTED FROM MULTI-CORE OPTICAL FIBER - According to the present invention, as a result of using a depressed or trench-assisted light-receiving waveguide in which the core is surrounded by a layer having a refractive index lower than that of a cladding as light-receiving means for receiving light outputted from a multi-core optical fiber, the layer of a low refractive index can inhibit the propagation of noise, etc. from the cladding to the core. Consequently, even in cases where the inter-core crosstalk is small, it is possible to accurately measure the inter-core crosstalk since components different from crosstalk-derived components in optical power are reduced. | 04-02-2015 |
20150247977 | OPTICAL COUPLING MEMBER - An optical coupling member includes an adapter and an optical connector. The optical connector has a ferrule, a connector housing, and a holding member. The holding member allows relative movement between the connector housing and the ferrule, and holds a relative angle around a central axis between the connector housing and the ferrule. The connector housing has a contact portion including a contact surface. The adapter has a sleeve and an adapter housing. The ferrule is inserted into the sleeve while the contact surface contacts with the adapter housing for elastically deforming the contact portion. | 09-03-2015 |