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    • 131. 发明公开
    • OPTICAL WAVEGUIDE DIFFRACTION GRATING DEVICE AND ITS FABRICATION METHOD
    • VERFAHREN ZU SEINER HERSTELLUNG的OPTISCHES WELLENLEITUNGSBEUGUNGSGITTERBAUEMENT
    • EP1406098A4
    • 2005-09-21
    • EP02741421
    • 2002-07-05
    • SUMITOMO ELECTRIC INDUSTRIES
    • OHMURA MSHIGEHARA M
    • G02B6/00G02B6/10G02B6/34H01S3/00G02B6/16
    • G02B6/02138G02B6/02085
    • A waveguide diffraction grating device (gradient diffraction grating device) comprises modulated refraction index sections (13 n ). If the refraction index level surface where the refraction index is equal is designated by L n , the line perpendicular to the refraction index level surface L n and crossing the optical axis (x−axis) of an optical fiber (10) is designated by A n , the angle between the line A n and the optical axis is designated by θ n , and the plane of angle of deviation formed by the line A n and the optical axis is designated by M n (n=1 to N); in each modulated refraction index section (13 n ), the line A n is not parallel to the optical axis, the angle θ n between the line An and optical axis is not zero, and the planes of angle of deviation M n of each modulated refractive index section (13 n ) do not agree with one another. The forming regions where any two modulated refractive index sections (13 n1 , 13 n2 ) among the modulated refractive index sections (13 1 to 13 N ) at least overlap with each other. A method for fabricating the waveguide diffraction grating device (gradient diffraction grating device) is also disclosed.
    • 垂直于周期性扰动部分(4)的平面(L)的线(A)相对于光波导的光轴(X-X)倾斜。 当光波导在没有扭转的情况下是线性的时,波导包括根据波导在纵向上的位置而变化的偏转角平面:独立权利要求包括以下内容:(1)制造光波导型滤波器的方法; (2)光纤放大器; (3)光波导型衍射光栅装置; 和(4)制造光波导型衍射光栅装置的方法。
    • 138. 发明公开
    • OPTICAL WAVEGUIDE CIRCUIT
    • OPTISCHER WELLENLEITERSCHALTKREIS
    • EP1191362A4
    • 2005-07-06
    • EP00925585
    • 2000-05-10
    • FURUKAWA ELECTRIC CO LTD
    • NARA KAZUTAKANAKAJIMA TAKESHIKASHIHARA KAZUHISA
    • G02B6/12G02B6/10G02B6/126G02B6/132G02B6/293G02B6/34
    • G02B6/126G02B6/105G02B6/12023G02B6/1203G02B6/132
    • An optical waveguide circuit such as an array waveguide diffraction grating in which the influence of polarization-dependent loss can be suppressed without providing a half-wave plate. A lower clad is formed on a silicon wafer (11). A core having the following waveguide constitution is formed thereon. An input-side slab waveguide (13) is connected to the output side of a plurality of incidence waveguides (12), and a plurality of array waveguides (14) having different lengths are connected side by side to the output side. An output-side slab waveguide (15) is connected to the output side thereof, and a plurality of output waveguides (16) is connected to the output side. The core is clad with upper clad. A plurality of multiplex-inputted incident light beams having different wavelengths are separated for every wavelength and outputted. The clad and the core are made of silica glass. The absolute value |B| of double refraction caused in the optical waveguide circuit is |B| . The relationship between the coefficient of thermal expansion alpha g of the upper clad and the coefficient of thermal expansion alpha s of the silicon wafer is expressed by alpha s-2.0 x 10 .
    • 本发明涉及一种阵列波导光栅等光波导电路,其能够在不设置半波片的情况下抑制极化依赖性损失的影响。 在硅衬底上形成下包层。 在其上形成具有以下波导结构的芯。 也就是说,输入侧平板波导连接到多个入射波导的发射侧,彼此不同长度的多个阵列波导并置并连接到发射侧,输出侧平板波导进一步 连接到其发射侧,并且多个发射波导连接到其发射侧,从而引起上述波导结构。 上部包层覆盖芯。 被入射到芯体中的具有彼此不同波长的多个多路复用和输入光束被波长分离并输出。 包层和芯由二氧化硅基玻璃制成,其中在所述光波导部分中出现的双折射值B为| B | <= 5.34×10-5,而α≤2.0×10-7 <= alphag <= alphas + 2.0 建立了x10-7,假定上包层的热膨胀系数为alphag,硅衬底的热膨胀系数为α。