Abstract:
PURPOSE: A planar waveguide-type optical amplifier switch is provided to decrease an optical loss and a volume by making an optical waveguide as an optical material having an optical gain and directly installing an optical switch on the optical waveguide. CONSTITUTION: An optical pumping of a light distributed through an optical power dividing filter(4) is performed through a WDM coupler(1) in an optical waveguide(2) using fluorescence emitting materials. A wave-type optical amplifier switch amplifies an optical signal through the optical waveguide(2) and performs an optical switch function using a waveguide refractive index change by an electrical control or an optical control through an electrode(3) for an electrical control refractive index change.
Abstract:
본 발명은 단일 파장의 광원으로 펌핑하여 희토류 원소에 의한 광신호 증폭과 비선형 라만효과에 의한 광신호 증폭을 동시에 발생시키면서 광 증폭대역이 서로 중첩되지 않도록 하는 광섬유 및 이를 이용한 하이브리드 광섬유 증폭기에 관한 것으로, 클래드와, 상기 클래드의 굴절율 보다 큰 굴절율을 갖도록 구성되는 코어로서 소정의 파장을 갖는 펌핑광을 입력 받아 희토류 원소에 의해 제1 밴드로 광증폭을 하도록 첨가되는 제 1 원소와 비선형 라만 광증폭에 의해 제2 밴드로 광증폭을 하도록 첨가되는 제 2 원소를 포함하는 코어를 포함하여 구성된 증폭용 광섬유를 제공한다. 광증폭기, 희토류, 라만, 어븀 게르마늄 동시 첨가 광섬유
Abstract:
본 발명은 Ho 3+ : 5 I 5 → 5 I 7 천이로부터 방출되는 1.6 ㎛ 형광을 광증폭기로 이용하면서 펌프효율을 향상시킬 수 있는 여기광원의 주 파장대역과 5 I 5 준위와 5 I 7 준위간 밀도반전을 이루어 증폭기의 이득특성을 향상시킬 수 있는 보조펌프 파장대역을 개진한다. 홀뮴이나 홀뮴과 터븀, 홀뮴과 유로퓸, 홀뮴과 네오디뮴 또는 홀뮴과 디스프로슘 등이 첨가된 광재료를 이용하는 광증폭기를 11,200~11,500 cm -1 범위의 빛을 방출하는 광원 또는 6,000~6,500 cm -1 범위의 빛을 방출하는 광원을 이용하여 펌핑할 수 있다.
Abstract:
A high-speed wavelength channel selector has properties of relatively easy manufacturing and easy extension to multi-channel integration, and a high-speed space and wavelength multiplexed channel selector uses the high-speed wavelength channel selector. The high-speed wavelength channel selector is integrated with electro-optic waveguide switches of non-crystalline materials, such as electro-optic polymers or glasses, in the middle of a pair of wavelength multiplexer and demultiplexer and the high-speed space and wavelength multiplexed channel selector has the photonic integrated circuit-type composition of a space multiplexed channel selector containing M electro-optic waveguide switches and an Mx1 channel combiner, the high-speed wavelength channel selector, optical amplifier and a high-speed wavelength converter.
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.
Abstract:
PURPOSE: A method for forming two conductive layers insulated therebetween on an optical fiber is provided to form an electrode for polling the optical fiber by forming conductive layers at the optical fiber of a single mode or a multiple mode. CONSTITUTION: A plurality of grooves(120,121) are formed on an upper surface of a substrate(110). A plurality of optical fibers(126,127) are adhered on the grooves(120,121) by using photoresist(130,131). A photoresist pattern(140) is formed on a surface of the optical fibers. A plurality of conductive layers(145,145a,145b) are formed on the resultant including the photoresist pattern. The photoresist pattern is removed. The optical fibers are separated from the grooves. The conductive layer is removed from the photoresist pattern. The conductive layers are formed on an opposite side to the conductive layer.
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:
본 발명은 모드 로킹(mode locking) 광섬유 레이저 공진 장치에 관한 것으로, 광섬유의 비선형 효과인 브릴루앙(Brillouin) 신호의 온도에 따른 주파수 변화를 에러 신호로 이용하여 광섬유 레이저를 안정화시킨, 모드 로킹 광섬유 레이저 공진 장치를 제공하기 위하여, 모드 로킹 광섬유 레이저 공진 장치에 있어서, 브릴루앙 펌프 신호를 발생시키기 위한 브릴루앙 펌핑 수단; 상기 브릴루앙 펌핑 수단에서 발생된 브릴루앙 펌프 신호를 입력받아 브릴루앙 신호를 생성하기 위한 브릴루앙 신호 생성 수단; 상기 브릴루앙 신호 생성 수단에서 생성된 브릴루앙 신호를 입력받아 주파수 성분을 검출하기 위한 주파수 검출 수단; 상기 주파수 검출 수단에서 검출된 상기 브릴루앙 신호의 주파수와 상기 모드 로킹 광섬유 레이저 공진 장치에 입력되는 신호의 주파수를 비교하여, 그 차를 측정하기 위한 주파수 비교/측정 수단; 상기 주파수 비교/측정 수단에서 측정된 주파수 신호를 전기적 신호로 변환하기 위한 신호 변환 수단; 상기 신호 변환 수단에서 변환된 전기적 신호를 증폭하기 위한 신호 증폭 수단; 및 상기 신호 증폭 수단에서 증폭된 신호를 입력받아, 그에 따라 길이가 팽창되거나 수축되어, 상기 모드 로킹 광섬유 레이저 공진 장치를 안정화시키기 위한 광섬유 수축 및 팽창 수단을 포함하며, 광전송 시스템 등에 이용됨.
Abstract:
PURPOSE: An electrode line for manufacturing a periodically poled optical fiber and a method thereof are provided to simply and cheaply manufacture the periodically poled optical fiber. CONSTITUTION: An optical fiber(50) is prepared. The optical fiber(50) includes lower and upper clad layers(51,52), a core layer, lower and upper electrode arrangement areas. A first electrode line(53) is arranged at one layer of the lower and upper clad layers. A second electrode line(54) is arranged at another layer of the lower and upper clad layers(51,52). A voltage is applied to the first and second electrode lines(53,54) to form a plurality of first polarization areas. The first and second electrode lines(53,54) are rearranged so that parts which are not polarized are polarized. A voltage is applied to the first and second electrode lines(53,54) to form a plurality of second polarization areas between the plurality of first polarization areas.