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公开(公告)号：US5381503A
公开(公告)日：1995-01-10
申请号：US61385
申请日：1993-05-14
CPC分类号： G02B6/262 , G02B6/2552
摘要： There is disclosed an optical waveguide comprising a core portion made of a light propagating material and a cladding portion, a first dopant and a second dopant being induced into said core portion, the first dopant having a function of increasing a refractive index of the light propagating material and having a first thermal diffusion coefficient to said light propagating material, the second dopant having a function of decreasing the refractive index of said light propagating material and having a second thermal diffusion coefficient to the light propagating material larger than the first thermal diffusion coefficient under a predetermined temperature.
摘要翻译： 公开了一种光波导，包括由光传播材料和包层部分构成的芯部分，第一掺杂剂和第二掺杂剂被诱导到所述芯部分中，第一掺杂剂具有增加传播光的折射率的功能 材料，并且对所述光传播材料具有第一热扩散系数，第二掺杂剂具有降低所述光传播材料的折射率并且具有比第一热扩散系数大的第二热扩散系数的第二热扩散系数的函数， 预定温度。
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公开(公告)号：US5446820A
公开(公告)日：1995-08-29
申请号：US98908
申请日：1993-07-29
CPC分类号： G02B6/2552
摘要： An object of this invention is to provide a mode field diameter conversion optical fiber which can be processed in a short period of time to have a reduced mode field diameter at a desired portion thereof. The optical fiber according to this invention comprises a core of silica glass having a residual tensile stress, and a cladding surrounding the core and having a lower refractive index than that of the core. The desired portion is heated to relax the residual tensile stress in the core, whereby the optical fiber has a reduced mode field diameter at the desired portion.
摘要翻译： 本发明的目的是提供一种可以在短时间内处理以在其期望部分具有减小的模场直径的模场直径转换光纤。 根据本发明的光纤包括具有残余拉伸应力的石英玻璃芯和围绕芯的包层，并且折射率低于芯的折射率。 加热所需部分以松弛芯中的残余拉伸应力，由此光纤在期望部分具有减小的模场直径。
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公开(公告)号：US5377294A
公开(公告)日：1994-12-27
申请号：US77935
申请日：1993-06-18
IPC分类号： G02B6/00 , C03C3/32 , C03C4/00 , G02F1/35 , G02F1/355 , H01S3/06 , H01S3/063 , H01S3/067 , H01S3/07 , H01S3/0915 , H01S3/16 , H01S3/17
CPC分类号： H01S3/06716 , C03C3/325 , C03C4/0071 , H01S3/06754 , H01S2302/00 , H01S2303/00 , H01S3/1611 , H01S3/1691 , H01S3/173
摘要： An optical functioning glass for enabling optical amplification at 1.3-.mu.m wavelength band or increasing efficiency of the amplification is disclosed. The optical functioning glass contains Nd.sup.3+ as an active material and uranium, both of which are doped in a multi-component function glass serving as a host glass. Since uranium is doped in the optical functioning glass, light emission of Nd.sup.3+ in the 1.06-.mu.m wavelength band can be absorbed by uranium. A decrease in efficiency of induced emission in a 1.3-.mu.m wavelength band can be prevented, and an optical functioning glass suitable for optical amplification in the 1.3-.mu.m wavelength band can be obtained. When a fiber is formed using the optical functioning glass as a core, a low-threshold, high-gain fiber amplifier, fiber laser, and the like can be obtained.
摘要翻译： 公开了一种用于使得在1.3μm波长带上进行光学放大或增加放大效率的光学功能玻璃。 光学功能玻璃含有作为活性物质的Nd 3+和铀，两者均掺杂在作为主体玻璃的多组分功能玻璃中。 由于铀在光学功能玻璃中被掺杂，所以在1.06μm波段中的Nd 3+的发光可被铀吸收。 可以防止在1.3μm波长带中的感应发射效率的降低，并且可以获得适用于1.3μm波段的光放大的光功能玻璃。 当使用光学功能玻璃作为核心形成光纤时，可以获得低阈值，高增益光纤放大器，光纤激光器等。
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公开(公告)号：US5244846A
公开(公告)日：1993-09-14
申请号：US829477
申请日：1992-02-03
IPC分类号： G02B6/00 , C03C3/32 , C03C4/00 , G02F1/35 , G02F1/355 , H01S3/06 , H01S3/063 , H01S3/067 , H01S3/07 , H01S3/0915 , H01S3/16 , H01S3/17
CPC分类号： H01S3/06716 , C03C3/325 , C03C4/0071 , H01S3/06754 , H01S2302/00 , H01S2303/00 , H01S3/1611 , H01S3/1691 , H01S3/173
摘要： An optical functioning glass for enabling optical amplification at 1.3-.mu.m wavelength band or increasing efficiency of the amplification is disclosed. The optical functioning glass contains Nd.sup.3+ as an active material and uranium, both of which are doped in a multi-component function glass serving as a host glass. Since uranium is doped in the optical functioning glass, light emission of Nd.sup.3+ in the 1.06-.mu.m wavelength band can be absorbed by uranium. A decrease in efficiency of induced emission in a 1.3-.mu.m wavelength band can be prevented, and an optical functioning glass suitable for optical amplification in the 1.3-.mu.m wavelength band can be obtained. When a fiber is formed using the optical functioning glass as a core, a low-threshold, high-gain fiber amplifier, fiber laser, and the like can be obtained.
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公开(公告)号：US5640269A
公开(公告)日：1997-06-17
申请号：US622149
申请日：1996-03-27
IPC分类号： G02B6/00 , G02B6/02 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/16 , H01S3/17 , H04J14/02 , H01S3/00
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： An optical fiber amplifier comprises a composite optical fiber for receiving signal light and excitation light, amplifying the signal light and emitting the amplified signal light, comprising at least two kinds of optical fibers serially coupled each having a glass composition selected from at least two kinds of rare-earth-doped glass compositions, and excitation means for generating excitation light and supplying it to the composite optical fiber. Then, an optical fiber amplifier which reduces the wavelength dependency of gain in various wavelength ranges in wavelength division multiplexing transmission or in optical analog transmission, and which maintains an energy efficiency for amplification, an optical fiber amplifier which makes a wavelength at a gain peak to a predetermined one in accordance with intensities of various input lights, and an optical amplifier repeater comprising this optical fiber amplifier are provided.
摘要翻译： 光纤放大器包括用于接收信号光和激发光的复合光纤，放大信号光并发射放大的信号光，包括至少两种串联耦合的光纤，每个光纤具有选自以下的至少两种 稀土掺杂的玻璃组合物，以及用于产生激发光并将其提供给复合光纤的激励装置。 然后，在波分多路复用传输或光模拟传输中降低各种波长范围的增益的波长依赖性并且保持放大的能量效率的光纤放大器使波长为增益峰值的光纤放大器 提供根据各种输入光的强度的预定值，以及包括该光纤放大器的光放大器中继器。
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公开(公告)号：US06282361B1
公开(公告)日：2001-08-28
申请号：US09459873
申请日：1999-12-14
申请人： Masayuki Nishimura , Koji Nakazato
发明人： Masayuki Nishimura , Koji Nakazato
IPC分类号： G02B600
CPC分类号： G02B6/12021 , G02B6/12016 , G02B6/12033 , G02B6/266 , G02F1/0121 , G02F1/0147 , G02F1/0327 , G02F2001/212 , H04B10/294
摘要： The present invention is to provide a multi-channel variable optical attenuator with a small size and a simple control circuitry, which requires a short time for adjusting the attenuation level of signal lights. The optical attenuator comprises an optical attenuating portion 10, a control circuitry 20 and a master control circuitry 21. The optical attenuating portion includes a plurality of optical waveguides 121-12N and a plurality of attenuation adjusting portions 131-13N, both of which is formed in a substrate 11. A signal light of a specific wavelength &lgr;i, which is derived from the wavelength multiplexed light, transmits in a respective waveguide 12i and is attenuated by a specific amount at the attenuation adjusting portion 13i. The control circuitry 20outputs a plurality of control signals 141-14N to attenuation adjusting portions 131-13N so that the attenuation in each optical waveguides 121-12N is varied by the specific amount to the master control 22 sent from the master control circuitry 21. Thus, optical output levels from waveguides 121-12N are equalized.
摘要翻译： 本发明提供一种具有小尺寸的多通道可变光衰减器和简单的控制电路，其需要很短的时间来调节信号灯的衰减水平。 光衰减器包括光衰减部分10，控制电路20和主控电路21.光衰减部分包括多个光波导121-12N和多个衰减调节部分131-13N，两者都形成 来自波长多路复用光的特定波长兰姆迪的信号光在相应波导12i中传输，并在衰减调节部13i被衰减特定量。 控制电路20将多个控制信号141-14N输出到衰减调节部分131-13N，使得每个光波导121-12N中的衰减改变到从主控制电路21发送的主控制器22的特定量。因此 ，波导121-12N的光输出电平相等。
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公开(公告)号：US5721635A
公开(公告)日：1998-02-24
申请号：US562631
申请日：1995-11-24
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： This method comprises the steps of: introducing light signals having different wavelengths into an optical amplifier, wherein the optical amplifier has a plurality of fibers with rare earth element doped therein and P is selectively doped in said fibers; and introducing excitation light into the fibers, the excitation light being able to excite the rare earth element. At least one of the fibers has Al therein and the relationship between the Al and P concentration satisfies following expression: C(P)/C(Al)>2, where, C(P) is P concentration in the fiber, and C(Al) is Al concentration in the fiber.
摘要翻译： 该方法包括以下步骤：将具有不同波长的光信号引入到光放大器中，其中光放大器具有掺杂有稀土元素的多个光纤，并且P选择性地掺杂在所述光纤中; 并将激发光引入到纤维中，激发光能够激发稀土元素。 至少其中一根纤维具有Al，Al和P的浓度之间的关系满足下列表达式：C（P）/ C（Al）> 2，其中C（P）是纤维中的P浓度，C（ Al）是纤维中的Al浓度。
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公开(公告)号：US5572357A
公开(公告)日：1996-11-05
申请号：US389698
申请日：1995-02-14
申请人： Koji Nakazato , Masayuki Nishimura
发明人： Koji Nakazato , Masayuki Nishimura
CPC分类号： H01S3/10023 , H01S2301/04 , H01S3/0064 , H01S3/06725 , H01S3/06754 , H01S3/094011 , H01S3/2316 , H01S3/2333
摘要： An optical amplifier for amplifying light having first and second signals includes an optical circulator for outputting light input from a first port through a second port, and outputting light input from the second port through a third port. A first amplifier for amplifying light passing therethrough is connected to the second port. A second amplifier for amplifying light passing therethrough is connected to the first amplifier. A first reflector for reflecting the first light signal, and transmitting the second light signal is arranged between the first and second amplifiers and a second reflector for reflecting the second light signal is arranged such that the second amplifier is located between the first and second reflectors. A separate branch may be connected to compensate for time difference experienced by the first and second signals when traveling through the first and second amplifiers.
摘要翻译： 一种用于放大具有第一和第二信号的光的光放大器，包括：光环行器，用于输出从第一端口通过第二端口输入的光;以及通过第三端口输出从第二端口输入的光。 用于放大穿过其中的光的第一放大器连接到第二端口。 用于放大通过其中的光的第二放大器连接到第一放大器。 用于反射第一光信号和透射第二光信号的第一反射器布置在第一和第二放大器之间，并且用于反射第二光信号的第二反射器被布置成使得第二放大器位于第一和第二反射器之间。 可以连接单独的分支以补偿当行进第一和第二放大器时第一和第二信号所经历的时间差。
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公开(公告)号：US5532870A
公开(公告)日：1996-07-02
申请号：US346256
申请日：1994-11-23
IPC分类号： G02B6/00 , G02B6/02 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/16 , H01S3/17 , H04J14/02 , H01S3/00 , H01S3/30
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： An optical fiber amplifier comprises a composite optical fiber for receiving signal light and excitation light, amplifying the signal light and emitting the amplified signal light, comprising at least two kinds of optical fibers serially coupled each having a glass composition selected from at least two kinds of rare-earth-doped glass compositions, and excitation means for generating excitation light and supplying it to the composite optical fiber. Then, an optical fiber amplifier which reduces the wavelength dependency of gain in various wavelength ranges in wavelength division multiplexing transmission or in optical analog transmission, and which maintains an energy efficiency for amplification, an optical fiber amplifier which makes a wavelength at a gain peak to a predetermined one in accordance with intensities of various input lights, and an optical amplifier repeater comprising this optical fiber amplifier are provided.
摘要翻译： 光纤放大器包括用于接收信号光和激发光的复合光纤，放大信号光并发射放大的信号光，包括至少两种串联耦合的光纤，每个光纤具有选自以下的至少两种 稀土掺杂的玻璃组合物，以及用于产生激发光并将其提供给复合光纤的激励装置。 然后，在波分多路复用传输或光模拟传输中降低各种波长范围的增益的波长依赖性并且保持放大的能量效率的光纤放大器使波长为增益峰值的光纤放大器 提供根据各种输入光的强度的预定值，以及包括该光纤放大器的光放大器中继器。
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公开(公告)号：US08546722B2
公开(公告)日：2013-10-01
申请号：US13054459
申请日：2009-06-18
申请人： Eiichiro Yamada , Akira Inoue , Koji Nakazato , Hiroshi Kohda , Hitoshi Hatayama , Takemi Hasegawa
发明人： Eiichiro Yamada , Akira Inoue , Koji Nakazato , Hiroshi Kohda , Hitoshi Hatayama , Takemi Hasegawa
CPC分类号： G02B6/04 , B23K26/032 , B23K2101/40 , G01N21/95684
摘要： A laser processing apparatus 1 includes a processing light source 3 emitting processing light; an observation light emitting unit 4 emitting observation light; optical fibers 19 conducting light having a plurality of wavelengths generated at an electronic component 2; a detecting unit 5 detecting the light conducted by the optical fibers 19; and a control unit 31 controlling a light emitting state of the processing light emitting unit 3. The optical fibers 19 are categorized into four groups, and disposed so as to surround an optical fiber 18 conducting the processing light. The optical fibers 19 categorized into the four groups are capable of conducting the observation light to the electronic component 2 every group.
摘要翻译： 激光加工装置1包括发出处理光的处理光源3; 发射观察光的观察发光单元4; 在电子部件2处产生具有多个波长的光的光纤19; 检测由光纤19传导的光的检测单元5; 以及控制处理用发光单元3的发光状态的控制单元31.光纤19分为四组，并且设置成围绕进行处理光的光纤18。 分为四组的光纤19能够每组观察光到电子部件2。
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