Abstract:
본 발명은 전자기 액츄에이터를 이용한 펌프를 개시한다. 본 발명에 의하면, 구조가 간단하면서 소형으로 구현하는 것이 가능하며, 코일에 흐르는 전류를 위한 에너지 외에는 별도의 에너지가 필요없어서 에너지 소비가 적은 유체 수송용 미니 펌프에 사용될 수 있게 되며, 그 결과 비교적 작은 전압에 의해 큰 구동 거리를 가지며 높은 에너지 밀도를 얻을 수 있고 비교적 빠른 응답 속도를 가지는 초소형의 펌프를 제작할 수 있는 기술적인 기반을 제공한다.
Abstract:
A sealing material for an electronic tag is provided to facilitate protection of personal information recorded in the electronic tag while implementing the sealing material at a low cost by using a photochromic material. The surface contains the photochromic material or a polymer material coated by the photochromic material. A chip and an antenna for recording and inputting/outputting the information are attached to the electronic tag. Another surface contains metal for shielding the electronic tag from electromagnetic wave or the polymer material coated by the metal. The electromagnetic wave is variably shield by photochromic reaction property of the photochromic material. The photochromic material is realized by using one of TiO2 or SiO2 compounds, or the material mixing both compounds as a base material, and doping ionic metal to the base material. The ionic metal is one or two selected from Au, Ag, Cu, Fe, Cr, Ni, Co, or W.
Abstract:
본 발명은 툴륨 이온이 첨가된 규산염 유리 및 그 용도에 관한 것으로, 특히, 1.4㎛대역의 형광방출 특성이 우수한 새로운 조성의 툴륨 첨가 규산염 유리에 관한 것이다. 본 발명에 따른 규산염 유리는 산화규소(SiO 2 ) 65~95몰%; ZnO, BaO, SrO 및 PbO 로 이루어진 중 선택된 하나 또는 둘 이상을 포함하는 2가 금속 산화물 0.5~30몰%; SnO 2 및 TiO 2 중 선택된 하나 또는 둘을 모두 포함하는 4가 금속 산화물 1~15몰%;를 포함하는 유리기지 조성을 가지며, 상기 유리기지 조성 중 3~30몰%의 산소(O)가 불소(F)로 치환되어 있고, 활성이온으로서의 툴륨 이온이 0.01~1몰% 첨가된 규산염 유리로서, 여기서 상기 툴륨 이온의
3 H 4 의 형광수명이 50㎲이상인 것을 특징으로 한다. 또한 상기 유리기지 조성에 K 2 O, Rb 2 O, Cs 2 O 중 선택된 하나 또는 둘 이상을 포함하는 알칼리 금속 산화물 0.5~5몰%; 및/또는 In 2 O 3 및 Sb 2 O 3 중 선택된 하나 또는 둘을 모두 포함하는 3가 금속 산화물 1~15몰%이 더 포함될 수도 있다. 본 발명에 따른 툴륨 이온이 첨가된 규산염 유리는 광섬유 등의 광도파로 형태로 제작하기가 용이하고, 전송용 광섬유와의 접속 특성도 우수할 뿐 아니라 내구성 및 내수성이 우수한 규산염 유리를 기초로 하고 있으면서도, 문제가 되었던 매질 자체의 높은 포논 에너지로 인한 다중 포논 완화에 의한 비복사 전이를 억제하고 3 H 4 준위의 형광 수명을 증가시켜 우수한 1.4 ㎛ 대역 형광 방출 특성을 나타낼 수 있다.
Abstract:
The present invention relates to a method of manufacturing a waveguide using an ion exchange process. The present invention controls the refractive index and the thickness of a surface layer on a glass substrate using an ion exchange process, forms the waveguide pattern on the surface layer by means of photolithography and etching process and coats with materials having the refractive index same to or lower than that of the glass substrate to form a cladding layer. Accordingly, the present invention can manufacture a planar waveguide, which is excellent in dimension control and reproducibility and has a sharp step wall.
Abstract:
PURPOSE: A wavelength selector for wavelength division multiplexing network is provided to shorten the length of an all-optical switch and enhance the switching speed by forming an optical switching portion with a Michelson interferometer. CONSTITUTION: A wavelength selector for wavelength division multiplexing network includes an input portion, a demultiplexing portion(410), and an optical switching portion(420). The demultiplexing portion(410) which is coupled to the input portion divides the input beam of the input portion into beams of different wavelengths and outputs the divided beams. The optical switching portion(420) includes an all-optical switch(424) and a mirror(426). The all-optical switch(424) is used for transmitting the output beams of the demultiplexing portion(410). The mirror(426) is used for reflecting the beams of the all-optical switch(424) to the opposite direction. The optical switching portion(420) selects the beam having a particular wavelength by a Michelson interferometer.
Abstract:
PURPOSE: A method is provided to control an optical waveguide size stably by adopting an active ion etching process using an ion exchange process and a photolithography process, and to achieve a steep stair-shaped wall and a constant depth irrespective of a pattern width. CONSTITUTION: A surface portion is formed on a glass substrate having a refractive index of 1.45 to 1.60. A refractive index of the surface portion is larger than that of the glass substrate. A photoresist pattern is formed on a position where a waveguide is formed. An optical waveguide(12) is formed by etching the surface portion of the glass substrate through an active ion etching process using the photoresist pattern as a mask. After removing the photoresist pattern, a cladding layer(13) is formed by coating a material having a lower refractive index than the glass substrate on a resultant structure.
Abstract:
PURPOSE: Provided is a clad mold for producing optical fiber by a melting method which can be prepared economically in a simple process, and thereby it is possible to prevent a parent material of optical fiber from being contaminated by impurities and deteriorated in its quality. CONSTITUTION: The mold of clad(10) for producing a parent material of optical fiber comprises a clad mold(11) of a pipe shape having an end closed, a predetermined length and an inner diameter corresponding to a diameter of a clad; and a cylindrical core rod(12) attached to the closed end of the clad mold(11) in the same axis as the clad mold(11) and having a predetermined length and an outer diameter corresponding to a diameter of a core to be formed. The clad mold is prepared by (i) pouring melted glass to a hollow of the mold of clad(10), followed by solidifying the glass to form a clad; (ii) removing the clad mold(11); (iii) removing the core rod(12); and (iv) inserting a core rod into a hollow formed by removing the core rod in the step (iii).
Abstract:
PURPOSE: Provided are thulium and dysprosium doped glass and photoelectric elements which have high efficiency using the same. CONSTITUTION: The glass used as a medium of a photoelectric element has a thulium ion and dysprosium ion doped composition, wherein the base glass is selected from tellurite glass, heavy metal oxide glass, fluoride glass and so on. The photoelectric elements are composed of the thulium ion and dysprosium ion doped glass and is an optical amplifier or optical fiber laser having a bandwidth of 1.42-1.53 micrometer.
Abstract:
PURPOSE: A low phonon energy glass added complex ion and an optic fiber amplifier are provided to enhance an excitation efficiency of 980 nm zone by adding an erbium adding glass having a low phonon energy as tellurites to a cerium. CONSTITUTION: In the case that an erbium is only added and a spectrum generated from a glass adding an erbium and a cerium, a fluorescent strength on 980 nm generated by 4I11/2 to 4I15/2 transition is greatly decreased, and a fluorescent strength on 1530 nm generated by 4I13/2 to 4I15/2 transition is greatly increased. According as an adding density of a cerium is increased, a transition velocity of 4I11/2. If the cerium is 4 mole %, the increase amount is little decreased. A theoretical releasing transition velocity from 4I11/2 of tellurites glass to 4I13/2 is 45 s-1, and a multi-phonon relaxation velocity is about 4500 s-1. Thus, a transition velocity is enhanced about 2000 s-1 by adding 1 mole% cerium. An excitation efficiency of 980 nm zone is enhanced by adding a glass phonon energy thereof is 800 cm-1 to a cerium.