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    • 31. 发明申请
    • Method of manufacturing semiconductor laser element
    • 制造半导体激光元件的方法
    • US20030008530A1
    • 2003-01-09
    • US10032580
    • 2002-01-02
    • THE FURUKAWA ELECTRIC CO., LTD.
    • Naoki TsukijiSatoshi Irino
    • H01L021/26
    • G03F7/7045H01S5/0201H01S5/1203H01S5/2275
    • Provided is a method of manufacturing a semiconductor laser element for collectively forming semiconductor laser elements having diffraction grating partially provided at least on the side of laser light emitting end surface or laser light reflection end surface side using a semiconductor process technique. The method comprises the step of performing electron beam exposure or ion beam exposure for drawing only on a diffraction grating region on which said diffraction grating is provided in correspondence with a pattern of said diffraction grating, and masking the diffraction grating region and exposing a region other than said diffraction grating region with light or X-rays.
    • 提供了一种半导体激光元件的制造方法,该半导体激光元件用半导体工艺技术共同形成至少在激光发射端面或激光反射端面侧的一侧部分设置的衍射光栅的半导体激光元件。 该方法包括以下步骤:对与所述衍射光栅的图案相对应地进行电子束曝光或离子束曝光以仅绘制在其上提供所述衍射光栅的衍射光栅区域上,并掩蔽衍射光栅区域并暴露其它区域 比具有光或X射线的所述衍射光栅区域。
    • 32. 发明申请
    • Dispersion management optical transmission system and optical transmission line
    • 色散管理光传输系统和光传输线路
    • US20030007737A1
    • 2003-01-09
    • US10117170
    • 2002-04-08
    • The Furukawa Electric Co., Ltd.
    • Kazunori Mukasa
    • G02B006/26G02B006/16G02B006/22
    • G02B6/02242G02B6/02261G02B6/02271G02B6/03633G02B6/03644G02B6/29377
    • A dispersion management optical transmission system obtained by connecting a positive fiber having a positive dispersion in the 1.5 nullm band and a negative fiber having a negative dispersion, suppressing dispersion in the 1.5 nullm band, suppressing the occurrence of non-linear phenomena, and reducing the transmission loss and an optical transmission line using the same, wherein the dispersion of the positive fiber in the 1.55 nullm band is 8 to 15 ps/nm/km and the dispersion slope is at least 0.04 ps/nm2/km, the dispersion of the negative fiber in the 1.55 nullm band is not more than null40 ps/nm/km and the dispersion slope is not more than null0.08 ps/nm2/km, the cumulative dispersion of the positive fiber is at least 200 ps/nm, and the average dispersion when combining the positive fiber and the negative fiber module is suppressed to any wavelength region of the 1.5 nullm band.
    • 一种色散管理光传输系统,其通过将1.5μm波段的正色散正负光纤和负色散的负光纤连接起来,抑制1.5μm波段的色散,抑制非线性现象的发生, 传输损耗和使用该传输损耗的光传输线,其中正纤维在1.55mum带中的色散为8至15ps / nm / km,色散斜率为至少0.04ps / nm2 / km, 1.55μm波段中的负光纤不超过-40ps / nm / km,色散斜率不大于-0.08ps / nm2 / km,正光纤的累积色散至少为200ps / nm, 将正纤维和负纤维模块组合时的平均色散抑制到1.5μm波段的任何波长区域。
    • 33. 发明申请
    • Optical multiplexer/demultiplexer
    • 光复用器/解复用器
    • US20030002786A1
    • 2003-01-02
    • US10156868
    • 2002-05-30
    • The Furukawa Electric Co., Ltd.
    • Isao OoyamaHiroyuki KoshiTakuya KomatsuKazuhisa Kashihara
    • G02B006/293G02B006/26
    • G02B6/12007G02B6/29352G02B6/2938G02B2006/12038G02B2006/12159
    • An optical multiplexer/demultiplexer of the present invention is, for example, a low-cost optical multiplexer/demultiplexer with a low transmission loss, while a chip length of this optical multiplexer/demultiplexer is made short. In an optical multiplexer/demultiplexer in which plural stages of optical multiplexing/demultiplexing circuits 8 (8A to 8G) having Mach-Zehnder interferometer type waveguide structures are connected to each other, an averaged wavelength of cross transmission wavelengths is made longer an averaged wavelength of through transmission wavelengths in each stage of the optical multiplexing/demultiplexing circuits 8 (8A to 8G). In each stage of the optical multiplexing/demultiplexing circuits 8 (8A to 8G), a coupling efficiency of first and second directional coupling portions (1, 2) with respect to the averaged wavelength of the cross transmission wavelengths is set to approximately 50%.
    • 本发明的光复用器/解复用器例如是具有低传输损耗的低成本光复用器/解复用器,而该光复用器/解复用器的码片长度变短。 在其中具有马赫 - 曾德干涉仪型波导结构的多级光复用/解复用电路8(8A至8G)彼此连接的光复用器/解复用器中,使交叉透射波长的平均波长变长 通过光复用/解复用电路8(8A〜8G)的各级的发送波长。 在光复用/解复用电路8(8A至8G)的每个级中,第一和第二定向耦合部分(1,2)相对于交叉透射波长的平均波长的耦合效率被设置为大约50%。
    • 35. 发明申请
    • Method for detecting defect of optical fiber
    • 检测光纤缺陷的方法
    • US20020196427A1
    • 2002-12-26
    • US10217456
    • 2002-08-14
    • THE FURUKAWA ELECTRIC CO., LTD.
    • Shinpei TodoYasuhiro NakaAkira Aikawa
    • G01N021/00
    • G01M11/35G01M11/088
    • In defect detecting method for detecting defect of an optical fiber to be measured, in which a laser beam is illuminated onto an optical fiber to be measured from a direction transverse to an optical axis of the fiber to check intensity distribution of forward scattering light permeated through within the optical fiber and scattered, and the defect of the optical fiber to be measured is detected on the basis of a pattern of the intensity distribution, the pattern of the intensity distribution is subjected to a smoothing process having weak smoothness and a smoothing process having strong smoothness to form first and second patterns, respectively, and a judging pattern is formed on the basis of a difference or the quotient between the first and second patterns, and the defect of the optical fiber to be measured is detected by evaluating magnitude of the judging pattern. The pattern of the intensity distribution is subjected to Fourier transform to form a frequency spectrum pattern, and the frequency spectrum pattern is evaluated by using double logarithmic axis, and a judging curve having high contributing rate to the frequency spectrum pattern is applied to the frequency spectrum pattern to seek dispersion of the frequency spectrum pattern from the judging curve, and the defect of the optical fiber to be measured is detected on the basis of magnitude of the dispersion.
    • 在用于检测待测光纤的缺陷的缺陷检测方法中,其中激光束从横向于光纤的光轴的方向照射到待测光纤上,以检查透过的前向散射光的强度分布 在光纤内散射,并且基于强度分布的图案检测待测光纤的缺陷,对强度分布的图案进行平滑处理,平滑处理具有平滑度弱,平滑处理具有 强的平滑度分别形成第一和第二图案,并且基于第一和第二图案之间的差或商来形成判断图案,并且通过评估待测光纤的尺寸来检测待测光纤的缺陷 判断模式。 将强度分布的图案进行傅里叶变换以形成频谱图案,并且通过使用双对数轴来评估频谱图案,并且将对频谱图案具有高贡献率的判断曲线应用于频谱 根据判断曲线求出频谱图的色散的图案,根据色散的大小检测待测光纤的缺陷。
    • 36. 发明申请
    • Arrayed waveguide grating optical multiplexer demultiplexer
    • 阵列波导光栅光复用器解复用器
    • US20020191914A1
    • 2002-12-19
    • US10094795
    • 2002-03-12
    • The Furukawa Electric Co., Ltd.
    • Junichi HasegawaAtsushi HiraizumiTsunetoshi SaitoYoshinobu Nekado
    • G02B006/34G02B006/293
    • G02B6/12014G02B6/1203G02B2006/12135
    • An arrayed waveguide grating optical multiplexer/demultiplexer is provided to suppress a temperature depending characteristic of a center wavelength. The arrayed waveguide grating comprises at least one optical input waveguide, a first slab waveguide, an arrayed waveguide, a second slab waveguide, and a plurality of optical output waveguides. The first slab waveguide is separated on an cross separating plane which is intersected to a path of light passing through the first slab waveguide to constitute separated slab waveguides. A slide moving member is provided which may move at least one of these separated slab waveguides along the cross separating plane, depending upon the temperature. A front surface side of the waveguide forming region and a rear surface side of the substrate are sandwiched by a positional shift suppressing member such as a clip. The possition depressing the waveguide forming region by the clip is escaped from the optical axis of the separated slab waveguides.
    • 提供阵列波导光栅光复用器/解复用器以抑制中心波长的温度依赖特性。 阵列波导光栅包括至少一个光输入波导,第一平板波导,阵列波导,第二平板波导和多个光输出波导。 第一平板波导在交叉分离平面上分离,交叉分离平面与穿过第一平板波导的光路相交,以构成分离的平板波导。 提供了滑动移动构件,其可以根据温度沿着交叉分离平面移动这些分离的平板波导中的至少一个。 波导形成区域的前表面侧和基板的后表面侧被诸如夹子的位置偏移抑制构件夹持。 通过夹子压住波导形成区域的可能性从分离的平板波导的光轴中逸出。
    • 40. 发明申请
    • Arrayed waveguide grating optical multiplexer/demultiplexer
    • 阵列波导光栅光复用器/解复用器
    • US20020154861A1
    • 2002-10-24
    • US10058085
    • 2002-01-29
    • THE FURUKAWA ELECTRIC CO., LTD.
    • Kazutaka NaraKazuhisa Kashihara
    • G02B006/34G02B006/26
    • G02B6/12016H04J14/02
    • An arrayed waveguide grating optical multiplexer/demultiplexer includes an arrayed waveguide connected to at least one first optical waveguide via a first slab waveguide. A plurality of second optical waveguides are connected to the arrayed waveguide via the second slab waveguide. A number (Nch) of the plurality of second optical waveguides is determined to substantially satisfy the equation, nullffsrnullnullfchnullNchnullnullffsr is Free Spectral Range of the arrayed waveguide grating optical multiplexer/demultiplexer. nullfch is a frequency interval between frequencies of lights to be input to the arrayed waveguide grating optical multiplexer/demultiplexer for being multiplexed or lights to be output from the arrayed waveguide grating optical multiplexer/demultiplexer after being demultiplexed.
    • 阵列波导光栅光复用器/解复用器包括经由第一平板波导连接到至少一个第一光波导的阵列波导。 多个第二光波导经由第二平板波导连接到阵列波导。 多个第二光波导的数量(Nch)被确定为基本上满足等式,DELTAffsr = DELTAfch.Nch.DELTAffsr是阵列波导光栅光复用器/解复用器的自由光谱范围。 DELTAfch是待复用后的阵列波导光栅光复用器/解复用器的光的频率之间的频率间隔,以及被解复用后从阵列波导光栅光复用器/解复用器输出的光的频率间隔。