Abstract:
PURPOSE: An amplifying optical fiber and a method for manufacturing the same are provided to maximize the efficiency of a gain media which is doped with rare earth element. CONSTITUTION: An amplifying optical fiber includes a center core and an optical cladding which surrounds the center core. The center core is based on silica matrix including nano particles. Nano particles are composed of a matrix material which includes at least one doping ions of rare earth elements.
Abstract:
본 발명은 붕소 및 불소로 도핑된 유리관 제조방법에 관한것이다. B 2 O 3 로 도핑된 관모양의 다공성 예형이 가열되고, 불소함유가스가 상기 예형의 구멍으로 유동된다. 상기의 온도는 불소함유가스가 상기 예형의 구멍으로 유동된다. 상기의 온도는 불소함유가스가 상기 예형을 도핑시키는 불소를 분해 및 형성하기에 충분히 높아야 한다. 불소가 상기 다공성 예형에서 B 2 O 3 와 반응 및 상기 구멍 표면근처에서 B 2 O 3 결핍지역을 형성하는 것을 방지하기 위하여 충분한 양의 BF 3 가 상기 구멍으로 유동된다. 구후 상기 입자들이 용융되어 불소를 함유하는 고밀도 유리관을 제조한다.
Abstract:
The application relates to an amplifying optical fiber having a central core and an optical cladding surrounding the central core, wherein the central core is based on a silica matrix comprising nanoparticles, which nanoparticles are composed of a matrix material comprising doping ions of at least one rare earth element. The matrix of the nanoparticle is chosen to favor rare earth solubility and dispersion and to favor the amplification process. In addition, the application relates to an optical amplifier and an optical laser comprising the present optical fiber. The invention relates to a method of preparing nanoparticles by adding compounds comprising the elements forming the nanoparticle to an aqueous solution with pH in the range of 6-10 under stirring. Further the invention relates to a method of manufacturing the present optical fiber comprising a heating step to strengthen the nanoparticles.
Abstract:
An optical fiber including: (i) a silica based, rare earth doped core (12) having a first index of refraction n1; (ii) a silica based inner cladding (14) surrounding the core and having a second index of refraction n2, such that n1>n2, the inner cladding having a plurality of air holes (24, 26) extending longitudinally through the length of the optical fiber; (iii) a silica based outer cladding (16) surrounding the inner cladding and having a third index of refraction n3, such that n2>n3; wherein the optical fiber supports a single polarization mode within the operating wavelength range.
Abstract:
Disclosed is a method of making an optical fiber preform having at least one annular region of depressed refractive index. A tube of silica doped with fluorine and/or boron is overclad with silica soot. A core rod is inserted into the overclad tube and the resultant assembly is heated while chlorine flows between the tube and the core rod to clean the adjacent surfaces. When the soot consolidates, the tube collapses onto and fuses to the rod. The resultant tubular structure is provided with cladding and drawn to form an optical fiber which exhibits low attenuation as a result of the low seed count at the interface between the inner core and the region that is doped with florine and/or boron.