摘要:
An optical fiber that includes a central core (34) having a maximum dimension (A) greater than a minimum dimension (B), preferably with an aspect ratio greater than 1.5, the fiber having at least one air hole (24, 26) positioned on opposite sides of the central core and extending along the fiber's length wherein the fiber supports a single polarization mode within an operating wavelength band. The fiber may be coupled to optical components in systems to provide single polarization in the band. A method for manufacturing the fiber is also provided.
摘要:
An optical article including a core; at least one cladding layer; and a narrow fluorine reservoir between the core and the cladding layer. The fluorine reservoir has a higher concentration of fluorine than either the cladding layer or the core. One particular embodiment includes a core including a halide-doped silicate glass that comprises approximately the following in cation-plus-halide mole percent 0.25-5 mol% Al 2 O 3 , 0.05-1.5 mol% La 2 O 3 , 0.0005-0.75 mol% Er 2 O 3 , 0.5-6 mol% F, 0-1 mol% Cl.
摘要翻译:一种包括芯的光学制品; 至少一层包层; 以及在芯和包层之间的窄氟储存器。 氟储存器具有比包覆层或芯层更高的氟浓度。 一个具体实施方案包括包含卤化物掺杂的硅酸盐玻璃的核,其在阳离子加 - 卤化物摩尔百分比为0.25-5摩尔%Al 2 O 3,0.05-1.5摩尔%La 2 O 3,0.0005-0.75摩尔%Er 2 O 3,0.5-6 mol%F,0-1mol%Cl。
摘要:
A co-doped optical fiber is provided having an attenuation of less than about 0.17 dB/km at a wavelength of 1550 nm. The fiber includes a core region in the fiber having a graded refractive index profile with an alpha of greater than 5. The fiber also includes a first cladding region in the fiber that surrounds the core region. Further, the core region has an effective refractive index of about -0.10% to about +0.05% compared to pure silica. In addition, the core region includes silica that is co-doped with chlorine at about 1.2% or greater by weight and fluorine between about 0.1% and about 1% by weight.
摘要:
An optically active linear single polarization device includes a linearly birefringent and linearly dichroic optical waveguide (30) for propagating light and having single polarization wavelength range (48). A plurality of active dopants are disposed in a portion (34) of the linearly birefringent and linearly dichroic optical waveguide (30) for providing operation of the waveguide in an operating wavelength range (650) for overlapping the single polarization wavelength range (48).
摘要:
An optical fiber includes a core region having a longitudinal axis. A cladding region surrounds the core region. The core region and cladding region are configured to support and guide the propagation of signal light in a fundamental transverse mode in the core region in the directions of the axis. The fiber has a bend-induced gradient of its equivalent index of refraction indicative of a loss in guidance of the mode. At least a portion of cladding region has a graded index of refraction opposite the bend-induced gradient. The cladding region is configured to have a substantially flat equivalent index in response to a bend of the optical fiber.
摘要:
An optical waveguide, such as an optical fiber, including a core having a refractive index n co and a radius r co ; an inner cladding laterally surrounding the5 core, the inner cladding having a refractive index n ic and an outer radius of r ic ; an outer cladding laterally surrounding the inner cladding, the outer cladding having a refractive index n oc ; and a narrow depressed well, wherein n co > n oc > > n ic . The range of the ratio of the inner, depressed-well clad radius, r ic , to core radius, r co , varies from 2.4 to 3.0. The waveguide has a +Δ of 0.0014 to 0.0021, a -Δ of -10 0.0021 to--0.0034, and a Δ tot of 0.0043 to 0.0049.
摘要:
A non-linear optical fiber capable of producing non-linear optical phenomena at high efficiency, an optical fiber coil composed of coiled non-linear optical fibers, and a wavelength converter provided with the non-linear optical fiber. The non-linear optical fiber in particular has characteristics for input light of a predetermined wavelength, which include a modal field diameter of 5 mu m or less, a polarization dispersion of 1 ps/km or a constant plane of polarization, a zero-dispersion wavelength of 1.5 mu m to 1.6 mu m, a cutoff wavelength of 1.4 mu m to 1.7 mu m for a fiber length of 2 m, a transmission loss of 3 dB/km or less, and a non-linear coefficient of 10/W/km or higher. With this configuration the non-linear optical fiber can generate highly efficiently desired converted light by the non-linear phenomena.
摘要翻译:能够以高效率产生非线性光学现象的非线性光纤,由线圈非线性光纤构成的光纤线圈和设置有非线性光纤的波长转换器。 非线性光纤特别地具有预定波长的输入光的特性,其包括5μm或更小的模场直径,1ps / km 1/2的偏振色散或恒定的偏振平面 ,1.5μm至1.6μm的零色散波长,光纤长度为2μm的截止波长为1.4μm至1.7μm,传输损耗为3dB / km或更小,非线性 系数在10 / W / km以上。 通过这种配置,非线性光纤可以通过非线性现象产生高效率的所需转换光。
摘要:
A single mode optical fiber comprises a core (e.g., 10), a first cladding (e.g. 11) surrounding the core, and a second cladding (e.g. 12) surrounding the first cladding. It also comprises a third cladding region (or index ''ring'') (e.g. 13). The core has radius a and refractive index nc, the first, second, and third cladding regions have inner radii, R1i, R2i, and R3i, outer radii R1o, R2o, and R3o, and indices n1, n2, n3, respectively. The fiber has n1