Abstract:
A transparent electronic device and a manufacturing method thereof are provided to reduce a manufacturing process and a manufacturing cost by forming simultaneously a p-type channel and an n-type channel. A buffer layer(120) is formed on an upper surface of a substrate. The buffer layer is made of an oxide layer or a nitride layer in order to form easily a crystalline thin film. A source(150) and a drain(160) are formed on an upper part of the buffer layer. A channel layer is formed between the source and the drain. A hard mask layer(140) is formed on an upper part of the channel layer. A transparent electrode(170) is formed on an upper part of the source and the drain. A gate is formed at an upper part of the transparent electrode.
Abstract:
A transparent thin film transistor having a polymer protection layer and a manufacturing method thereof are provided to prevent a change of characteristics caused by external environment and to prevent a change of characteristics of an active layer caused by a low-temperature process. A gate electrode(122) is formed on an upper surface of a substrate. A gate insulating layer(120) is formed on an upper surface of the gate electrode. A semiconductor active layer(130) is formed on an upper surface of the gate insulating layer. A source electrode and a drain electrode are formed at both ends of the semiconductor active layer, respectively. A protective layer of the polymer material is formed to cover the semiconductor active layer, the source electrode, and the drain electrode.
Abstract:
본 발명은 박막 자기 헤드의 제조방법에 관한 것으로, 특히 초미세 자기재생 소자를 제작함에 있어 포토 레지스트의 플로우 공정을 적용하여 하드 마그네트층과 금속다층박막 사이를 분리시킴과 아울러 포토 레지스트를 이용하여 상부전극과 하부전극 사이를 절연시킴으로써, 제조공정을 단순화, 최적화할 수 있을 뿐만 아니라 제조공정의 시간을 효과적으로 단축시킬 수 있는 박막 자기 헤드의 제조방법을 제공한다. 박막 자기 헤드, 하부전극, 포토 레지스트 패턴, 금속다층박막, 하드 마그네트층, 상부전극
Abstract:
희토류 원소를 첨가한 광섬유 증폭기용 셀레나이드 유리 조성물을 제공한다. 상기 광섬유 증폭기용 셀레나이드 유리 조성물은 희토류 원소가 첨가된 게르마늄-안티몬-셀레늄이나, 희토류 원소가 첨가된 게르마늄-안티몬-갈륨-셀레늄으로 이루어질 수 있다. 상기 게르마늄, 안티몬 및 셀레늄의 최적 함량은 각각 몰%를 단위로 18≤게르마늄≤32, 8≤안티몬≤17, 58≤셀레늄≤72이다. 상기 게르마늄, 안티몬, 갈륨 및 셀레늄의 최적 함량은 각각 몰% 단위로 23≤게르마늄≤32, 3≤안티몬≤12, 2≤갈륨≤7, 53≤셀레늄≤ 62이다. 상기 희토류 원소는 프라세오디뮴, 디스프로슘, 어븀, 툴륨, 홀뮴, 터븀 또는 네오디뮴이고, 상기 희토류 원소는 하나 이상 포함될 수 있다. 상기 광섬유 증폭기용 셀레나이드 유리 조성물은 1.6㎛ 대역의 광섬유 증폭기로 이용될 수 있고, 열적 안정성이 우수하여 저손실 광섬유로 용이하게 제작될 수 있다.
Abstract:
A wavelength selector to be used in WDM networks is provided. The wavelength selector is composed of a circulator, an arrayed waveguide grating (AWG), which is used for wavelength demultiplexing and multiplexing part, and an electro-optical (EO) switching part. The input light after the circulator is demultiplexed through the AWG part and each channel of the demultiplexed lights is modulated and reflected through the EO switching part which is formed as Michelson type interferometer with mirror parts returning the light to the AWG. The modulated and reflected light is multiplexed through the AWG and the direction is changed to the output through the circulator.
Abstract:
The present invention relates to a multi-channel wavelength division multiplexer/demultiplexer capable of efficiently coupling or separating wavelength multiplexed optical signals. The multi-channel wavelength division multiplexer/demultiplexer according to the present invention comprises a band splitting means for splitting the band of wavelength multiplexed optical signals (lambd1~lambdn) into M bands, a demultiplexing means for separating each band split by the band splitting means into a plurality of single wavelength channels, and a multiplexing means for coupling the single wavelength channels separated by the demultiplexing means. Therefore, the present invention can significantly increase the number of available wavelength channels while minimizing optical loss of wavelength channels.
Abstract:
광섬유 표면 상의 상호 절연된 두 도전막 형성방법이 개시된다. 본 발명에서는, 기판에 형성된 그루브에 광섬유를 접착한 다음, 사진식각공정으로 광섬유 상에 도전막이 형성될 부위만 개구하는 포토레지스트 패턴을 형성한다. 포토레지스트 패턴 상에 도전막을 형성한 다음 리프트 오프하면, 그루브에서 광섬유가 분리되는 동시에 포토레지스트 패턴 및 포토레지스트 패턴 상에 형성된 도전막이 제거되고, 광섬유 표면에는 원하는 패턴대로 형성된 도전막만 남는다. 도전막이 형성된 면의 반대면에 대해서도 위와 같은 방법으로 도전막을 형성하여 광섬유 상에 상호 절연된 두 도전막을 형성할 수 있다. 본 발명이 개시하는 방법에 따라 광섬유 상에 도전막을 형성한 다음, 이를 이용하여 폴링을 하게 되면, 변조기, 가변필터 및 스위치와 같은 광전소자, 전기장 센서, 및 주파수 변환기나 분산 보상기와 같은 비선형 광섬유 광학 소자에 널리 응용될 수 있다.
Abstract:
The present invention relates to the fabrication of an optical device; and, more particularly to an electrode for fabricating periodically poled optical fibers and a fabrication method of periodically poled optical fibers using the electrode. To fabricate periodically poled optical fibers for improving the effect of three wave mixing in accordance with the second-order nonlinear optical phenomenon, the periodically poled optical fibers of the present invention is formed by using one or more electrodes with holes or grooves for a period satisfying the quasi phase matching condition between light waves in use. Also, using the electrodes described above, one or more holes or one or more grooves are formed on the surface of the optical fiber around the core in its length direction, and thereby make an optical fiber poled periodically.
Abstract:
PURPOSE: A tellurite glass composition doped with erbium ion(Er3+) and possibly GeO2 and In2O3 is provided, which improves pumping efficiency of 980nm region at optical amplifier and decreases crystallization in production of optical fibers besides advantages of a conventional tellurite glass. CONSTITUTION: An Er-doped tellurite glass composition is obtained by adding 0.05-5mol% of Er ion, 0-20mol% of GeO2 and/or 0-10mol% of In2O3 to a tellurite matrix glass comprising 40-80mol% of TeO2, 1-20mol% of B2O3, 5-30mol% of metal(2+) oxide, and 1-15mol% of alkali metal oxide, where the metal is at least one selected from the group consisting of Mg, Ca, Sr, Ba, Zn and Pb, and the alkali metal is at least one selected from the group consisting of Li, Na. K. Rb and Cs.
Abstract translation:目的:提供掺铒离子(Er3 +)和可能的GeO2和In2O3的亚碲酸盐玻璃组合物,其除了传统亚碲酸盐玻璃的优点之外还提高光放大器的980nm区域的泵浦效率并减少光纤生产中的结晶。 构成:铒掺杂亚碲酸盐玻璃组合物是通过在含有40-80摩尔%TeO 2的碲酸盐基质玻璃中加入0.05-5摩尔%的Er离子,0-20摩尔%的GeO 2和/或0-10摩尔%的In 2 O 3, -20摩尔%的B 2 O 3,5-30摩尔%的金属(2+)氧化物和1-15摩尔%的碱金属氧化物,其中所述金属为选自Mg,Ca,Sr,Ba,Zn 和Pb,碱金属是选自Li,Na中的至少一种。 K. Rb和Cs。
Abstract:
PURPOSE: A method of fabricating optical fiber is provided to overcome the difficulties of adjusting a radius ratio of a core to a cladding and to prevent an impurity of a core/cladding interface from being input. CONSTITUTION: A core glass bar is made by mixing glass raw through a melting-quenching manner and by shaping and slowly cooling the mixed material. The core glass bar is heated over a glass transient temperature and is afflicted with a tensile force so as to be extended in a length direction. Thus, there is made a core glass bar having a desired length. The core glass bar is fixed at the center of a mold(21) having a structure comprising upper and lower fixing holes(22,23), and the mold is filled up with melt solution. An optical fiber material is made by slowing cooling the mode filled up with the melt solution. After heating the optical fiber material over the glass transient temperature, the optical fiber is made through a well-known manner.