Abstract:
본 발명은 마이크로 전자기계 시스템 액츄에이터에 관한 것으로, 보다 상세하게는 압전 캔틸레버 액츄에이터와 콤브 액츄에이터가 결합되어 2축 구동을 하는 마이크로 전자기계 시스템 액츄에이터를 제공한다. 본 액츄에이터에 의하면, 가동 콤브가 압전물질로 구성되어 있어 평면 액츄에이션뿐만 아니라, z축으로의 포커싱 액츄에이션도 병행가능하여 초박형 광 디스크 드라이브의 구동장치에 사용가능하다. 콤브 액츄에이터, 압전 액츄에이터, 압전 단결정 액츄에이터
Abstract:
본 발명은 광섬유 형태나 기타 광도파로 형태의 광증폭기로 사용할 수 있는 복합 이온 첨가 낮은 포논 에너지 유리 및 이를 이용한 광섬유 증폭기에 관한 것으로서, 상세하게는 통신 분야에서 유용하게 사용될 수 있는 어븀 이온을 첨가한, 구체적으로는 +3가 어븀(Er 3+ ) 이온을 첨가한 비정질 재료로부터 발생하는 1.5 ㎛ 대역의 근적외선 형광을 이용하는 광섬유 증폭기의 980 nm 대역의 여기 효율을 향상시키기 위하여 +3가 세륨(Ce 3+ ) 이온 또는 세륨 이온과 +3가 이터븀(Yb 3+ ) 이온을 공동으로 첨가함으로써 980 nm 파장 대역의 여기 효율을 증가시키고 1550 nm 파장대 광 증폭 특성 향상을 시킨 것이다.
Abstract:
본 발명은 마이크로 전자기계 시스템 액츄에이터에 관한 것으로, 보다 상세하게는 압전 캔틸레버 액츄에이터와 콤브 액츄에이터가 결합되어 2축 구동을 하는 마이크로 전자기계 시스템 액츄에이터를 제공한다. 본 액츄에이터에 의하면, 가동 콤브가 압전물질로 구성되어 있어 평면 액츄에이션뿐만 아니라, z축으로의 포커싱 액츄에이션도 병행가능하여 초박형 광 디스크 드라이브의 구동장치에 사용가능하다. 콤브 액츄에이터, 압전 액츄에이터, 압전 단결정 액츄에이터
Abstract:
Provided are an optical fiber that prevents optical amplification bands from overlapping each other while enabling optical signal amplification by a rare-earth element and optical signal amplification by a nonlinear Raman effect to simultaneously occur by performing a pumping operation using a single-wavelength light source, and a hybrid optical amplifier using the same. The optical fiber includes: a clad; and a core configured to have a refractive index larger than that of the clad, the core including a first element doped to receive pumped light having a predetermined wavelength and optically amplify the received signal light into a first band using a rare-earth element, and a second element doped to optically amplify the received signal light using nonlinear Raman optical amplification into a second band.
Abstract:
PURPOSE: Provided is a selenide glass composition for an optical amplifier, which has improved thermal stability while maintaining fluorescence characteristics of praseodymium, a rare earth metal element. CONSTITUTION: The selenide glass composition comprises germanium-antimony-selenium to which a rare earth metal element is added. In the glass composition, the contents of germanium, antimony and selenium are 18-32 mol%, 8-17 mol% and 58-72 mol%, respectively. In a variant, the selenide glass composition comprises germanium-antimony-gallium-selenium to which a rare earth metal element is added, wherein the contents of germanium, antimony, gallium and selenium are 23-32 mol%, 3-12 mol%, 2-7 mol% and 53-62 mol%, respectively. The rare earth metal element is at least one selected from the group consisting of praseodymium, dysprosium, erbium, thulium, terbium and neodymium.
Abstract:
The present invention relates to a multi-layer optical planar waveguide which is vertically coupled using multimode-interference couplers and to the method of manufacturing the same. The purpose of this invention is to increase the degree of integration on the multi-layer optical planar waveguide by applying the concept of via holes of the multi-layer printed circuit board (MLPCB) used in electronic circuits to the optical waveguide devices. According to the present invention, particularly, a multimode interference coupler of a stepped structure has the higher coupling ratio at relatively short length of interference than the usual multimode interference coupler. The present invention can implement a multimode interference coupler at a specialized spot while reducing evanescent field interference between the upper and lower optical waveguides out of the spot by separating the layers enough.
Abstract:
PURPOSE: A multimode interference coupler and a multi-layer optical planar waveguide using the multimode interference coupler and a manufacturing method thereof are provided to reduce the interference between upper and lower waveguide by forming the multimode interference coupler in a stepped structure, which has a high coupling ratio, between the upper and lower waveguide. CONSTITUTION: A lower core layer(124) is formed on a portion of a glass substrate(110) using ion exchanging. A UV(Ultraviolet) photosensitive polymer is applied on an upper surface of an entire structure. A refractive index of the UV photosensitive polymer is changed upon being exposed to a UV light. An upper core layer(144) is formed on a portion of the UV photosensitive polymer. An upper clad layer(142) is formed on the upper surface of the entire structure. A metal mask is provided on the upper clad layer(142) corresponding to a region where a multimode interference coupler(130) is to be formed. The multimode interference coupler(130) and a lower clad layer(122) are formed by irradiating a UV light onto the upper surface of the entire structure.
Abstract:
PURPOSE: Provided are thulium ion(Tm3+)-doped silicate glass excellent in fluorescence emission at 1.4micrometer, durability and water resistance, formation of optical waveguides, and connectivity properties of transmission optical fiber. CONSTITUTION: The Tm3+ doped silicate glass is characterized by doping 0.01-1mol% of Tm3+ ion to a glass composition consisting of 65-95mol% of SiO2, metal(II) oxides containing one or more of ZnO, BaO, SrO and PbO, 1-15mol% of metal(IV) oxide containing one or two of SnO2 and TiO2, wherein 3-30mol% of oxygen(O) in the glass composition is substituted for fluorine(F). Also, 0.5-5mol% of at least one selected from K2O, Rb2O3 and Cs2O, and 1-15mol% of one or two of In2O3 and Sb2O3 are added to the above glass composition. The resultant silicate glass is used for laser resonator, optical fiber laser, optical fiber amplifier, and planar waveguide optical amplifier.
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:提供掺有铒离子(Er3 +)和可能的GeO2和In2O3的碲化物玻璃组合物,除了常规的碲酸盐玻璃的优点外,还提高了光放大器980nm区域的泵浦效率,减少了光纤生产中的结晶。 构成:通过将0.05-5mol%的Er离子,0-20mol%的GeO 2和/或0-10mol%的In 2 O 3添加到包含40-80mol%的TeO 2的1的碲酸盐基质玻璃中获得铒掺杂的碲酸盐玻璃组合物, -20mol%的B2O3,5-30mol%的金属氧化物和1-15mol%的碱金属氧化物,其中金属是选自Mg,Ca,Sr,Ba,Zn中的至少一种 和Pb,碱金属为选自Li,Na中的至少一种。 K. Rb和Cs。