OPTICAL FIBER WITH TWO CORES, PROCESS OF ITS MANUFACTURE, FIBER LASER WITH TWO CORES AND FIBER AMPLIFIER WITH TWO CORES Russian patent published in 1999 - IPC

FIELD: optics. SUBSTANCE: proposed optical fiber has two cores, one pumping core, laser core placed in center of pumping core and shell surrounding pumping core. Characteristic feature of this optical fiber is polished face amounting to 1.0 to 49.0% of diameter of pumping core that runs in direction of light propagation in two-core optical fiber which is made outside in predominantly round cross-section of pumping core. Description presents process of manufacture of optical fiber with cores, fiber laser with two cores and fiber amplifier with two cores in which two-core optical fiber is used in accordance with invention. Optical fiber with predominantly round pumping core and laser core located in center provides for simple matching of it with other fiber-optical components and simple input of pumping radiation. EFFECT: simple matching of proposed optical fiber with other fiber-optical components and simple input of pumping radiation. 14 cl, 6 dwg