Patent application number | Description | Published |
20080267227 | Gain-clamped optical amplifier using double-clad fiber - Provided is a gain-clamped optical amplifier amplifying light without bandwidth loss of an incident optical signal, and the gain-clamped optical amplifier using a double-clad fiber comprises: an optical fiber including a core doped with a gain material for amplifying an optical signal, a primary clad adjacent to the outside of the core and having a lower refractive index than the core, and a secondary clad adjacent to the outside of the primary clad and having a lower refractive index than the primary clad; a light emitting element emitting a pump light for population inversion of the gain material; and a cavity unit producing laser oscillation by resonating spontaneous emission light emitted from the gain material population-inverted by the pump light. | 10-30-2008 |
20090147350 | AMPLIFIED SPONTANEOUS EMISSION REFLECTOR-BASED GAIN-CLAMPED FIBER AMPLIFIER - Provided is an all-optical gain-clamped fiber amplifier, comprising transmission and isolation means for periodically transmitting an optical signal or reflecting amplified spontaneous emission (ASE) back to a gain medium. The transmission and isolation means can be embodied by an optical interleaver or a number of optical fiber Bragg gratings. Accordingly, an optical signal can be amplified across the entire C-band, and an ASE reflector-based gain-clamped fiber amplifier having a wider dynamic range than conventional amplifiers can be implemented. | 06-11-2009 |
20110141758 | OPTICAL COUPLER AND ACTIVE OPTICAL MODULE COMPRISING THE SAME - Provided are an optical coupler, which can improve miniaturization and integration, and an active optical module comprising the same. The optical coupler comprises a hollow optical block having a through hole formed to pass an optical fiber therethrough. The hollow optical block comprises at least one incidence plane, at least one internal reflection plane, and at least one tapering region. The incidence plane is disposed at the bottom of the hollow optical block, which is parallel to the through hole, to incident-transmit light. The internal reflection plane is disposed at the top of the hollow optical block, which is opposite to the incidence plane, to reflect the light, which is received from the incidence plane, into the hollow optical block. The tapering region is configured to concentrate the light on the optical fiber in the through hole. The tapering region is formed such that the outer diameter of the hollow optical block decreases away from the internal reflection plane and the incidence plane. | 06-16-2011 |
20110261580 | OPTICAL FIBER COUPLER, METHOD OF MANUFACTURING THE SAME, AND ACTIVE OPTICAL MODULE - Provided are an optical fiber coupler, a method of manufacturing the same, and an active optical module. The optical fiber coupler comprises a first core, a first optical fiber, and a plurality of second optical fibers. The first optical fiber comprises a first cladding surrounding a first core. The plurality of second optical fibers have a tapering region of a cylindrical shape and surround the first cladding of the first optical fiber. Here, the first core has the same diameter within the tapering region. | 10-27-2011 |
20120213235 | OPTICAL COUPLERS AND ACTIVE OPTICAL MODULES USING THE SAME - Provided are an optical coupler and an active optical module including the same. The optical coupler includes at least one first optical fiber, a second optical fiber, and a hollow optical block. The at least one first optical fiber transfers pump light. The second optical fiber includes a cladding with a facet enlarged from a first outer diameter to a second outer diameter, and passes the pump light which is transferred through the first optical fiber. The hollow optical block includes a through hole, an incident surface, and a coupling surface. The through hole passes the cladding with the first outer diameter. The incident surface is connected to the first optical fiber at a side end of the through hole. The coupling surface is joined to the facet of the second optical fiber at the other side end of the through hole facing the incident surface. | 08-23-2012 |
20130243377 | OPTIC COUPLER, OPTICAL FIBER LASER DEVICE, AND ACTIVE OPTICAL MODULE USING THE SAME - The inventive concept provides optic couplers, optical fiber laser devices, and active optical modules using the same. The optic coupler may include a first optical fiber having a first core and a first cladding surrounding the first core, a second optical fiber having a second core transmitting a signal light to the first optical fiber and a third cladding surrounding the second core, third optical fibers transmitting pump-light to the first optical fiber in a direction parallel to the second optical fiber; and a connector connected between the first optical fiber and the second optical fiber, the connector extending the third optical fibers disposed around the second optical fiber toward the first optical fiber, the connector comprising a third core connected between the first core and the second core and a fifth cladding surrounding the third core. | 09-19-2013 |
20130287339 | PLANAR WAVEGUIDE ELEMENT - Disclosed is a planar waveguide element including a first cylindrical lens disposed based on an z-axis and configured to collimate beams emitted from a plurality of emitters of a laser diode bar; a lens array configured to gather the beam emitted from each emitter via the first cylindrical lens; a plurality of first waveguides existing on an x-y plane by a number of the plurality of emitters and configured to gather at one place via a bending section; a taper configured to connect the lens array and each first waveguide, a width of the taper being narrower from the lens array to the plurality of first waveguide; and a combined waveguide configured to combine the plurality of first waveguides into one. | 10-31-2013 |
20140212141 | LIGHT OUTPUT APPARATUS AND METHOD - Provided is a light output apparatus for increasing an output of an optical source. The light output apparatus includes a pulse generator generating a plurality of optical pulses, a pulse distributor dispersing the optical pulses generated from the pulse generator in time domain, an optical coupler allowing the dispersed optical pulses to travel along one path. The light output apparatus also includes an optical amplifier amplifying output intensities of optical pulses output from the optical coupler, a pulse separator separating the optical pulses amplified by the optical amplifier for each corresponding wavelength, a time delaying unit individually delaying each of the optical pulses separated for each wavelength to be reached a combination point at an identical time, and a pulse combiner combining the optical pulses arrived at the combination point at the identical time. | 07-31-2014 |
20150068252 | OPTICAL FIBER DRAWING APPARATUS HAVING SIMPLE STRUCTURE AND OPTICAL FIBER DRAWING METHOD USING THE SAME - Provided is an optical fiber drawing apparatus and optical fiber drawing method using the same. The apparatus may include a crucible accommodating core and clad sources and having a bottom hole through which the core and clad sources pass, and a plug disposed under the crucible, the plug passing through the bottom hole. The plug may include a bottom plug disposed under the crucible to close the bottom hole, and a first upper plug disposed on the bottom plug to pass through the bottom hole. | 03-12-2015 |