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    • 2. 发明申请
    • Optical amplifier fiber
    • 光放大器光纤
    • US20060262387A1
    • 2006-11-23
    • US11434073
    • 2006-05-16
    • Tetsuya HarunaToshiki TaruMasashi OnishiMotoki KakuiShinji Ishikawa
    • Tetsuya HarunaToshiki TaruMasashi OnishiMotoki KakuiShinji Ishikawa
    • H01S3/00H04B10/12
    • H01S3/06716
    • Provided is an optical amplifier fiber in which both increasing output light power and sufficiently inhibiting the occurrence of nonlinear optical phenomenon can be compatibly achieved. In addition, an optical amplifier and light source equipment, in which such optical amplifier fiber is used, are provided. The optical amplifier fiber comprises (1) a core region doped with an aluminum element in the range of 1 wt % to 10 wt %, an erbium element in the range of 1000 wt. ppm to 5000 wt. ppm, and a fluorine element, the core region having an outer diameter in the range of 10 μm to 30 μm, and (2) a cladding region surrounding the core region and having a refractive index that is lower than the core region, wherein the relative refractive index difference of the core region relative to the cladding region is 0.3% or more and 2.0% or less.
    • 提供了可以兼容地实现增加输出光功率并充分抑制非线性光学现象的发生的光放大器光纤。 此外,提供了使用这种光放大器光纤的光放大器和光源设备。 光放大器光纤包括(1)掺杂有1重量%至10重量%范围的铝元素的芯区域,铒元素在1000重量%范围内。 ppm至5000wt。 ppm,以及氟元素,芯区域的外径在10μm〜30μm的范围内,(2)围绕芯区域的折射率低于芯区域的包层区域,其中, 芯区域相对于包层区域的相对折射率差为0.3%以上且2.0%以下。
    • 3. 发明授权
    • Optical amplification fiber, optical amplifier module, optical communication system and optical amplifying method
    • 光放大光纤,光放大器模块,光通信系统和光放大方法
    • US07436583B2
    • 2008-10-14
    • US10933473
    • 2004-09-03
    • Motoki KakuiTetsuya HarunaShinji Ishikawa
    • Motoki KakuiTetsuya HarunaShinji Ishikawa
    • H01S3/00H01S3/10H04B10/12
    • H01S3/06754G02B6/02H01S3/06708H01S3/06716H01S3/06758H01S3/06766H01S3/094011
    • The present invention relates to an optical amplification fiber and others capable of effectively reducing nonlinear interaction between signal channels even in transmission of multiplexed signal light containing multiple signal channels arranged in high density and also effectively reducing bending loss. An optical amplification module has an optical isolator, a WDM coupler, an Er-doped optical fiber (EDF) as an optical amplification fiber, a WDM coupler, and an optical isolator, which are arranged in order on a signal light propagation path from an input connector to an output connector, and further has a pumping light source connected to the WDM coupler and a pumping light source connected to the other WDM coupler. The EDF, at the wavelength of 1607 nm, has a mode field diameter (MFD) of 10 μm or more to the fundamental mode and a MAC number (=MFD/cutoff wavelength) of 6.8 or less to the fundamental mode.
    • 本发明涉及一种光放大光纤和其他能够有效降低信号通道之间的非线性相互作用的技术,即使在包含以高密度布置的多个信号通道的多路复用信号光的传输中,并且还有效地减少了弯曲损耗。 光放大模块具有光隔离器,WDM耦合器,作为光放大光纤的掺铒光纤(EDF),WDM耦合器和光隔离器,它们依次布置在信号光传播路径上 输入连接器连接到输出连接器,并且还具有连接到WDM耦合器的泵浦光源和连接到另一WDM耦合器的泵浦光源。 在1607nm波长处的EDF具有基本模式的10mum以上的模场直径(MFD),与基本模式的MAC数(= MFD /截止波长)为6.8以下。
    • 6. 发明授权
    • Optical gain waveguide and method of controlling the same
    • 光增益波导及其控制方法
    • US07586673B2
    • 2009-09-08
    • US11365810
    • 2006-03-02
    • Takahiro MurataMotoki KakuiTetsuya Haruna
    • Takahiro MurataMotoki KakuiTetsuya Haruna
    • H01S3/00
    • H01S3/094003H01S3/06716
    • The present invention relates to an optical gain waveguide having excellent gain flatness in C-band, and excellent tolerance against variations of a pumping light wavelength as well, and a method of controlling the same. The optical gain waveguide includes an optical waveguide region which is doped with Er element which can be pumped by irradiating pumping light with a wavelength of 976 nm or less, or a wavelength of 981 nm or more. A population inversion of Er is optimized so that a gain variation in the C-band becomes minimum, by the irradiation of the pumping light. At this time, a relative gain variation of the optical gain waveguide, which is defined by a peak gain value and a minimum gain value in the wavelength region of 1,530 nm to 1,560 nm becomes smaller than 11.5%. In addition, in the optical gain waveguide, a width of wavelength range producing the relative gain variation smaller than 11% is 36 nm or more.
    • 本发明涉及一种具有优异的C波段增益平坦度的光增益波导,以及对泵浦光波长变化的良好公差及其控制方法。 光增益波导包括掺杂有Er元素的光波导区域,其可以通过照射波长976nm或更小或波长981nm或更大的泵浦光来泵浦。 通过照射泵浦光来优化Er的群体反演,使得C波段的增益变化最小。 此时,由1530nm至1,560nm的波长区域中的峰值增益值和最小增益值定义的光增益波导的相对增益变化小于11.5%。 此外,在光增益波导中,产生小于11%的相对增益变化的波长范围的宽度为36nm以上。
    • 8. 发明授权
    • Fluorescent glass, optical waveguide, optical fiber, optical coherence tomography apparatus, and optical fiber laser
    • 荧光玻璃,光波导,光纤,光学相干断层摄影装置和光纤激光器
    • US07940815B2
    • 2011-05-10
    • US11488902
    • 2006-07-19
    • Motoki KakuiTetsuya HarunaTakahiro Murata
    • Motoki KakuiTetsuya HarunaTakahiro Murata
    • H01S3/30
    • C03C13/046C03B2201/30C03B2201/32C03B2205/42C03C3/06C03C4/12C03C2201/10C03C2201/32G01N21/4795H01S3/06716
    • The present invention relates to fluorescent glass which is easily put into practical use, and optical elements including the same. In one aspect, the fluorescent glass is comprised of silica-based glass containing Bi as a dopant, and adapted to generate fluorescence in response to pumping light in a wavelength band of 980 nm incident thereon. In another aspect, the fluorescent glass contains at least one species of transition metal as a dopant, and exhibits a 980-nm band absorption spectrum having a full width at half maximum exceeding 10 nm. In still another aspect, the fluorescent glass is comprised of silica-based glass containing at least one species of transition element as a dopant, and exhibits a fluorescence spectrum with a peak intensity fluctuating within a range of −1 dB or more but 1 dB or less with respect to pumping light having a fixed intensity in a state set to a temperature of −5° C. or more but 65° C. or less.
    • 本发明涉及容易投入实际使用的荧光玻璃以及包含该荧光玻璃的光学元件。 在一个方面,荧光玻璃由含有Bi作为掺杂剂的二氧化硅基玻璃组成,并且适于响应入射到其上的980nm的波长带中的泵浦光产生荧光。 在另一方面,荧光玻璃含有至少一种过渡金属作为掺杂剂,并且表现出具有半峰全宽超过10nm的980nm带吸收光谱。 在另一方面,荧光玻璃由含有至少一种过渡元素作为掺杂剂的二氧化硅基玻璃构成,并且具有峰值强度在-1dB以上至1dB的范围内波动的荧光光谱,或 相对于在设定为-5℃以上且65℃以下的温度的状态下抽送具有固定强度的光较少。