摘要:
Fluoride glass-based optical fiber for an optical amplifier which contains rare earth metal ions in the core glass. The fluoride glass core is doped with rare earth metal ions, and part of the fluorine in the fluoride glass is substituted by at least one halogen. Pr 3+ , Pr 3+ -Yb 3+ -Nd 3+ , or Pr 3+ -Er 3+ can be doped as the rare earth metal ions. Chlorine, bromine or iodine may be used as the halogen.
摘要:
Fluoride glass-based optical fiber for an optical amplifier which contains rare earth metal ions in the core glass has a relative refractive index difference Δn between the core and the cladding of 1.4% or more. The core glass contains PbF 2 in a proportion of 25 mol% or less based on the total composition of the core glass. The fluoride glass is doped with rare earth metal ions, and part of the fluorine in the glass may be substituted by at least one halogen. Pr 3+ , Pr 3+ -Yb 3+ , Pr 3+ -Nd 3+ , or Pr 3+ -Er 3+ can be doped as the rare earth metal ions. Chlorine, bromine or iodine may be used as the halogen.
摘要:
An optical amplification medium doped with Er 3+ ions is selected from the group of a fluoride glass, a chalcogenide glass, a telluride glass, a halide crystal, and a lead oxide based glass. The Er 3+ ions are excited by light of at least one wavelength in the range of 0.96 µm to 0.98 µm. A laser or an optical amplifier includes this optical amplification medium doped with Er 3+ ions. Furthermore, an optical amplification method performs an optical amplification using the optical amplifier having the optical amplification medium doped with Er 3+ ions. Thus, the laser to be applied in the field of optical communication, the optical amplifier having the characteristics of low noise and high gain, and the optical amplification method can be provided.
摘要:
An optical amplification medium (4) doped with Er 3+ ions is selected from the group of a fluoride glass, a chalcogenide glass, a telluride glass, a halide crystal, and a lead oxide based glass. The Er 3+ ions are excited by light of at least one wavelength in the range of 0.96 µm to 0.98 µm. A laser or an optical amplifier includes this optical amplification medium (4) doped with Er 3+ ions. Furthermore, an optical amplification method performs an optical amplification using the optical amplifier having the optical amplification medium doped with Er 3+ ions. Thus, the laser to be applied in the field of optical communication, the optical amplifier having the characteristics of low noise and high gain, and the optical amplification method can be provided.
摘要翻译:掺杂有Er 3+离子的光学放大介质(4)选自氟化物玻璃,硫族化物玻璃,碲化物玻璃,卤化物晶体和氧化铅基玻璃。 Er <3+>的离子被至少一个波长的光激发在0.96μm至0.98μm的范围内。 激光器或光放大器包括掺杂有Er 3+离子的该光学放大介质(4)。 此外,光放大方法使用具有掺杂有Er 3+离子的光学放大介质的光放大器进行光放大。 因此,可以提供在光通信领域应用的激光器,具有低噪声和高增益特性的光放大器以及光放大方法。
摘要:
Provided is a process for preparing a homogenous fluoride glass containing high purity BaF₂ through the CVD process characterized in that the used gaseous mixture comprising: a barium β-diketonate complex serving as a first starting material and represented by the following general formula (1) of: wherein R is an alkyl group having 1 to 7 carbon atoms, R′ is a substituted alkyl group having fluorine atoms substituting hydrogen atoms and represented by C n F 2n+1 where n is an integer of from 1 to 3; and a gaseous or vaporizable compound of the matallic element constituting said fluoride glass, the gaseous or vaporizable compound serving as a second starting material; and a fluorine-containing gas serving as fluorinating agent. Further provided is a process for preparing a preform for a fluoride optical fiber which is low in trasmission loss, by depositing the fluoride glass over the interior wall of a cylindrical tube or the wall of rod-like glass substrate through the CVD process followed by collapsing.
摘要:
An optical amplifier having a tellurite glass as an optical amplification medium, characterised by comprising:
a dispersion medium which is placed on at least one position in the front of or at the back of the optical amplification medium, wherein the dispersion medium compensates for dispersion of wavelengths by a value of chromatic dispersion that takes a plus or negative number opposite to a value of chromatic dispersion for the optical amplification medium. In the figure, an optical signal enters from the left and exits from the right of the optical amplifier. Input signal light passes through optical isolator 201a and then, combined with excitation light from excitation light source 202, through optical coupler 203. Then the combined signal light passes into optical fiber 205 for optical amplification after passing through a dispersion medium 204. Signal light amplified by optical fiber 205 is then outputted through optical isolator 201b.
摘要:
This invention relates to fluoride glass with a specific composition having wide infrared transmission. A fluoride optical fiber using this fluoride glass can give high efficiency with a low loss. The fluoride optical fiber having a second cladding on the outer periphery of a first cladding can adjust the refractive index of the first cladding suitably.