Patent application number | Description | Published |
20100150553 | METHOD AND APPARATUS FOR GENERATING OPTICAL SHORT PULSE FOR QUANTUM CRYPTOGRAPHY COMMUNICATION - A method and apparatus for generating an optical short pulse for quantum cryptography communication is provided. The apparatus is incorporated as a module in an electronic integrated circuit chip, such as a field programmable gate array (FPGA) chip which performs quantum key distribution post-processing and open channel optical signal processing of a quantum cryptography system. The apparatus generates an electrical short pulse and converts the electrical short pulse into an optical short pulse, and it is possible to manufacture a compact apparatus for generating an optical short pulse for quantum cryptography communication. | 06-17-2010 |
20100150568 | OPTICAL TRANSCEIVER OPTIMIZING TRANSFER CHARACTERISTIC OF OPTICAL INTERFEROMETER AND METHOD OF OPTIMIZING TRANSFER CHARACTERISTIC OF OPTICAL INTERFEROMETER OF OPTICAL TRANSCEIVER - An optical transceiver for optimizing transfer characteristic of an optical interferometer and a method of optimizing transfer characteristic of an optical interferometer of an optical transceiver are provided. It is possible to improve the transmission performance of the optical transceiver by optimizing the transfer characteristic of the optical interferometer included in an optical receiver of the optical transceiver which transmits and receives an optical signal in a phase modulation scheme. | 06-17-2010 |
20110026123 | WAVELENGTH-DIVISION APPARATUS AND WAVELENGTH COMBINING APPARATUS - A wavelength-division apparatus and a wavelength combining apparatus are provided. Each of the wavelength-division apparatus and the wavelength combining apparatus includes a transparent block having one surface which is coated with an anti-reflective coating layer and the other surface which is coated with a partial transmitting coating layer. Each of the anti-reflective coating layer and the partial transmitting coating layer is coupled to a plurality of wavelength-selective filters that separate optical signals of different wavelengths through different paths other than a transmission path or a receiving path. Thus, the optical signals of the respective wavelengths output through the different paths can be used for various purposes such as monitoring the signal intensity and/or the signal quality. | 02-03-2011 |
20110058771 | MULTI-WAVELENGTH OPTICAL TRANSMITTING AND RECEIVING MODULES - A multi-wavelength optical transmitting module includes a housing, an optical output block, an optical transmitting block, and an optical multiplexer (MUX) block. The housing has a first coupling hole and a second coupling hole respectively formed in opposite surfaces thereof. The optical output block is coupled to the first coupling hole of the housing, is connected to an optical signal connector, and includes a first lens. The optical transmitting block is coupled to the second coupling hole of the housing and is connected to an electrical signal connector. In addition, the optical transmitting block includes a plurality of transmitting devices which respectively output light having different wavelengths and are arranged parallel to the optical output block, and a plurality of second lenses which are arranged on a light output side of the transmitting devices to correspond respectively to the transmitting devices. The optical multiplexer (MUX) block is disposed within the housing, multiplexes optical signals of multiple wavelengths, which were output from the transmitting devices and passed through the second is lenses, and transmits the multiplexed optical signals to the optical output block. | 03-10-2011 |
20120163751 | REFLECTION TYPE OPTICAL DELAY INTERFEROMETER APPARATUS BASED ON PLANAR WAVEGUIDE - A reflective type optical delay interferometer includes a coupler to divide an optical signal into two optical signals; a first optical waveguide connected to the coupler, to have a first optical delay path for transmitting a first optical signal which is one of the two optical signals; a second optical waveguide connected to the coupler, to transmit a second optical signal which is the other of the two optical signals and to have an optical delay path asymmetrical to the first optical delay path; and first and second polarization rotation reflection devices respectively connected to the first and second optical waveguides, wherein the first polarization rotation reflection device rotates polarizations of the first optical signal and the reflected first optical signal and the second polarization rotation reflection device rotates polarizations of the second optical signal and the reflected second optical signal. | 06-28-2012 |
20120207437 | OPTICAL MODULE - An optical module includes a stem, an optical element, data signal lead pins, a printed circuit board, and a post portion. The optical element is mounted on one surface of the stem. The data signal lead pins are connected to the optical element, and protrudes through the other surface of the stem. The printed circuit board has one surface on which data signal transmission lines for contact with the data signal lead pins are formed and the other surface on a part of which a stiffener is formed to protrude. The post portion protrudes from the other surface of the stem, supports the printed circuit board while in close contact with the stiffener such that the data signal lead pins can contact the data signal transmission lines while being disposed linearly above the data signal transmission lines, and includes a coupling portion to be coupled with the stiffener. | 08-16-2012 |
20140099123 | FLEXIBLE PRINTED CIRCUIT BOARD AND OPTICAL COMMUNICATION MODULE INCLUDING THE SAME - A flexible printed circuit board (FPCB) includes at least one signal pad part disposed at each of a top and bottom of a flexible substrate base and configured to include an upper signal pad and a lower signal pad and a through hole formed at a portion corresponding to a signal via, a signal line disposed at the top of the substrate base, and extending from the upper signal pad along a length direction of the substrate base, an upper ground pad disposed at the top of the substrate base to be separated from the upper signal pad and the signal line near the upper signal pad, and a lower ground pad disposed at the bottom of the substrate base to be separated from the lower signal pad near the lower signal pad, and connected to the upper ground pad through a ground via. | 04-10-2014 |
20140133870 | OPTICAL TRANSMITTER FOR GENERATING MULTI-LEVEL OPTICAL SIGNAL AND METHOD THEREFOR - An optical transmitter for generating a multi-level optical signal and a method therefore are provided. The optical transmitter includes an optical power splitter configured to split one optical signal into N paths, N optical intensity modulators configured to modulate the split optical signals into binary optical signals, and an optical power combiner configured to combine the intensity-modulated optical signals to generate a multi-level optical signal having 2 | 05-15-2014 |
20140153873 | OPTICAL COUPLING MODULE FOR SILICON PHOTONICS CHIP - An optical coupling module for a silicon photonics chip in which a grating is formed on an optical waveguide, and a material having an intermediate refractive index between refractive indexes of a core and a cladding for side surface optical coupling of the silicon photonics chip is provided. The optical coupling module which is optically coupled with an internal/external optical fiber comprises a core transmitting light, and a cladding covering the core and holding the light in the core through total internal reflection, wherein a grating is formed at one end of the core, and a refractive element is formed between the one end of the core and the cladding, has an intermediate refractive index between the refractive indexes of the core and the cladding, and is optically coupled with the internal/external optical fiber. | 06-05-2014 |
20140183344 | HYBRID OPTICAL COUPLING MODULE AND MANUFACTURING METHOD THEREOF - Provided are a hybrid optical coupling module and a manufacturing method thereof. | 07-03-2014 |
20140301736 | DIRECTLY MODULATED MULTI-LEVEL OPTICAL SIGNAL GENERATOR AND METHOD THEREOF - A directly modulated multi-level optical signal generator and a method thereof are provided. The multi-level optical signal generator includes N number of direct modulation lasers (DMLs) configured to directly modulate source light into a 2-level optical signal, and an optical power combiner configured to combine N number of 2-level optical signals directly modulated by the respective DMLs to generate a 2 | 10-09-2014 |