摘要:
An optical fiber amplifier having constant output power for each channel including a first measuring unit for dividing an input light signal into a first light signal and a second light signal, sub-dividing the first light signal into a plurality of light signals and converting the plurality of light signals into electrical signals to output the electrical signals, an optical fiber amplifying unit for amplifying the second light signal according to a predetermined amplification control value, a second measuring unit for converting a light signal of a predetermined wavelength band, output from the optical fiber amplifying unit, into an electrical signal, and an output power controller for controlling the predetermined amplification control value according to a plurality of output values of the first measuring unit and an output value of the second measuring unit, so that the power level of the optical fiber amplifying unit is maintained at a constant level.
摘要:
A digital image processing apparatus may display an image that can be converted into other images by using a rapid sliding method. The digital image processing apparatus may include a storage medium in which a first image file and a second image file are stored and a buffer in which information about a first synthesized image, including a first image corresponding to the first image file and a second image corresponding to the second image file disposed adjacent to each other, is stored. The digital image processing apparatus may further include a display unit that displays at least one of the first image, a first partial synthesized image, and the second image by using a piece of the information about the first synthesized image. The first partial synthesized image may include a portion of the first image and a portion of the second image disposed adjacent to each other.
摘要:
A first chemical mechanical polishing (CMP) slurry includes a polishing agent, an oxidant, a pH control additive, and an oxide film removal retarder which reduces a removal rate of the silicon oxide film. A second chemical mechanical polishing (CMP) slurry includes a polishing agent, an oxidant, a pH control additive, an oxide film removal retarder which reduces a removal rate of silicon oxide, and a defect prevention agent which inhibits scratch defects and/or corrosion defects at a surface of an aluminum film. In a one-step CMP process, either of the first or second slurry is used throughout CMP of an aluminum layer until an upper surface of an underlying silicon oxide layer is exposed. In a two-step CMP process, the first slurry is used in an initial CMP of the aluminum layer, and then the second slurry is used in a subsequent CMP until the upper surface of the underlying silicon layer is exposed.
摘要:
An optical attenuator using an isolator, and an optical communications system including the same, function to control the intensity of an input optical signal. The isolator comprises a Faraday rotator in which a rotation angle of polarization varies depending on the intensity of an applied magnetic field. As a result, the level of isolation of an optical signal changes in accordance with the rotation angle of polarization and an attenuated optical signal is outputted. A magnetic field generator generates a magnetic field having an intensity which is controlled by the intensity of current, and the generated magnetic field is applied to the isolator A power supply supplies current to the magnetic field generator and controls the intensity of the current. A magnetic core and a coil are installed on the optical isolator, and currents applied to the coil are controlled to adjust the intensity of the magnetic field which is formed on the isolator. Accordingly isolation of an optical signal is controlled, and the optical signal is attenuated. The optical attenuator is easily mounted on the system because of its small size, and can change the level of attenuation by controlling only the intensity of current.
摘要:
A digital image processing apparatus may display an image that can be converted into other images by using a rapid sliding method. The digital image processing apparatus may include a storage medium in which a first image file and a second image file are stored and a buffer in which information about a first synthesized image, including a first image corresponding to the first image file and a second image corresponding to the second image file disposed adjacent to each other, is stored. The digital image processing apparatus may further include a display unit that displays at least one of the first image, a first partial synthesized image, and the second image by using a piece of the information about the first synthesized image. The first partial synthesized image may include a portion of the first image and a portion of the second image disposed adjacent to each other.
摘要:
A digital image processing apparatus includes an image capturing unit that captures an image of a subject and converts the image into image data, a storage unit that stores the image data, a successive capturing information generating unit that adds successive capturing photographing information to image data of images that are obtained by the image capturing unit when successively capturing a plurality of images, a display unit that displays an image representing the image data, a user input unit that generates an input signal when an input is received from a user, and a slide show control unit that displays successively captured images obtained by a single successive capturing photographing operation on the display unit at predetermined time intervals based on the successive capturing photographing information included in the image data, wherein a portion of the successively captured images is enlarged and sequentially displayed.
摘要:
A method for manufacturing a multi-level transistor on a substrate. The method includes forming a first transistor on a first active region, forming a first selective epitaxial growth (SEG) layer on the substrate, and forming a preliminary second SEG layer and a dummy layer, wherein the preliminary second SEG layer is formed directly on only the first SEG layer and a portion of the first insulating layer formed on the cell region of the substrate, and wherein the dummy layer is formed on the peripheral region of the substrate. The method further includes planarizing the preliminary second SEG layer using the dummy layer as a stop layer to form a second SEG layer, forming a second active region from the second SEG layer formed on a first insulating layer, and forming a second transistor on the second active region.
摘要:
A first chemical mechanical polishing (CMP) slurry includes a polishing agent, an oxidant, a pH control additive, and an oxide film removal retarder which reduces a removal rate of the silicon oxide film. A second chemical mechanical polishing (CMP) slurry includes a polishing agent, an oxidant, a pH control additive, an oxide film removal retarder which reduces a removal rate of silicon oxide, and a defect prevention agent which inhibits scratch defects and/or corrosion defects at a surface of an aluminum film. In a one-step CMP process, either of the first or second slurry is used throughout CMP of an aluminum layer until an upper surface of an underlying silicon oxide layer is exposed. In a two-step CMP process, the first slurry is used in an initial CMP of the aluminum layer, and then the second slurry is used in a subsequent CMP until the upper surface of the underlying silicon layer is exposed.
摘要:
An long-wavelength optical fiber amplifier includes an erbium doped optical fiber (EDF) for amplifying an input signal light having a wavelength in the range of 1580 nanometers (nm) using pump light, a pumping unit positioned in front of and to the rear of the erbium doped optical fiber, for supplying the pump light to the erbium doped optical fiber, and an amplified spontaneous emission (ASE) reflecting unit positioned in front of the pumping unit, for coupling backward amplified spontaneous emission generated in the erbium doped optical fiber to the long-wavelength input signal light and inputting again the same to the erbium doped optical fiber. Fewer laser diodes and optical devices are necessary in amplifying an signal light having a long wavelength, by providing a reflector for reflecting amplified spontaneous emission. Also, the gain is increased in the case when the power of an input signal is small.
摘要:
A fiber amplifier packaging apparatus for reducing overall volume without damaging an optical fiber. The fiber amplifier packaging apparatus includes a housing on which an optical fiber for input and output of an optical signal is installed, inside of which a fiber amplifier can be located; a clamp for fixing the optical fiber to the housing; an insert including upper and lower plates located inside the housing and spaced apart from each other; a neck between the upper and lower plates; an erbium doped fiber (EDF) wound around the neck; a hollow tube extending through the upper and lower plates and the neck; a clip slipped over the insert so that the EDF does not unwind; and a cover locked to the housing for protecting optical parts located in the housing.