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1. 发明授权

US06763197B1 Optical transmitter and optical transmitter control method using variable duty ratio setting and alternate phase inversion for optical clock pulses 失效
标题翻译：光发射机和光发射机控制方法，使用可变占空比设置和光时钟脉冲的交替相位反转
公开(公告)号：US06763197B1
公开(公告)日：2004-07-13
申请号：US09588412
申请日：2000-06-06
申请人： Akira Hirano , Kazushige Yonenaga , Yutaka Miyamoto , Kenji Sato , Masaki Asobe
发明人： Akira Hirano , Kazushige Yonenaga , Yutaka Miyamoto , Kenji Sato , Masaki Asobe
IPC分类号： H04B1004
CPC分类号： H04L7/0075 , H04J14/08 , H04L25/4906
摘要： An optical transmitter for realizing a high tolerance with respect to the group velocity dispersion of the optical fibers, a small receiver sensitivity degradation, and an improved stability that is hardly affected by the group velocity dispersion even in the case of network scale expansion, is constructed by a light source section for generating optical clock pulses synchronized with a signal bit rate while maintaining a duty ratio of the optical clock pulses constant, which is capable of variably setting the duty ratio, and an encoding section for encoding the optical clock pulses by using electric signals synchronized with the optical clock pulses while setting a relative optical phase difference between the optical clock pulses in adjacent time-slots to be an odd integer multiple of &pgr;.
摘要翻译：构造光传输器，即使在网络规模扩展的情况下，也能够实现相对于光纤的群速度色散的高容差，小的接收机灵敏度劣化，几乎不受群速分散影响的改善的稳定性通过光源部分，用于产生与信号比特率同步的光时钟脉冲，同时保持能够可变地设置占空比的光时钟脉冲的占空比恒定;以及编码部分，用于通过使用电信号与光时钟脉冲同步，同时将相邻时隙中的光时钟脉冲之间的相对光相位差设置为pi的奇整数倍。

2. 发明申请

US20150036210A1 OPTICAL AMPLIFIER DEVICE 有权
标题翻译：光放大器装置
公开(公告)号：US20150036210A1
公开(公告)日：2015-02-05
申请号：US13980756
申请日：2012-01-20
申请人： Masaki Asobe , Takeshi Umeki , Kouji Enbutsu , Akio Tokura , Yutaka Miyamoto , Hidehiko Takara , Hirokazu Takenouchi , Isao Tomita
发明人： Masaki Asobe , Takeshi Umeki , Kouji Enbutsu , Akio Tokura , Yutaka Miyamoto , Hidehiko Takara , Hirokazu Takenouchi , Isao Tomita
IPC分类号： H01S3/067 , H01S3/00 , H01S3/108
CPC分类号： H01S3/06754 , G02F1/3532 , G02F1/3534 , G02F1/3536 , G02F1/3544 , G02F1/37 , G02F1/39 , G02F2001/392 , H01S3/0092 , H01S3/1083 , H01S3/2391
摘要： The phase sensitive amplifier according to the present invention is a phase sensitive amplifier that uses the optical mixing using a nonlinear optical effect to amplify the signal light. The phase sensitive amplifier according to the present invention includes: the first second-order nonlinear optical element; and the second second-order nonlinear optical element. The first second-order nonlinear optical element causes the fundamental wave light to generate second harmonic light used as pump light and separates only the second harmonic light. The second second-order nonlinear optical element includes a multiplexer to multiplex the signal light with the second harmonic light and spectrally separates only the amplified signal light. The multiplexed signal light and second harmonic light are used subjected to parametric amplification.
摘要翻译：根据本发明的相位敏感放大器是使用非线性光学效应的光学混合放大信号光的相位敏感放大器。根据本发明的相位敏感放大器包括：第一二阶非线性光学元件; 和第二二阶非线性光学元件。第一二阶非线性光学元件使得基波光产生用作泵浦光的二次谐波，并且仅分离二次谐波光。第二二阶非线性光学元件包括多路复用器，用于将信号光与二次谐波光进行多路复用，并仅对放大的信号光进行光谱分离。复用的信号光和二次谐波光被使用进行参数放大。

3. 发明授权

US09065243B2 Optical amplifier 有权
标题翻译：光放大器
公开(公告)号：US09065243B2
公开(公告)日：2015-06-23
申请号：US13980756
申请日：2012-01-20
申请人： Masaki Asobe , Takeshi Umeki , Kouji Enbutsu , Akio Tokura , Yutaka Miyamoto , Hidehiko Takara , Hirokazu Takenouchi , Isao Tomita
发明人： Masaki Asobe , Takeshi Umeki , Kouji Enbutsu , Akio Tokura , Yutaka Miyamoto , Hidehiko Takara , Hirokazu Takenouchi , Isao Tomita
IPC分类号： H01S3/067 , G02F1/39 , G02F1/35 , H01S3/00 , H01S3/108 , G02F1/37 , H01S3/23
CPC分类号： H01S3/06754 , G02F1/3532 , G02F1/3534 , G02F1/3536 , G02F1/3544 , G02F1/37 , G02F1/39 , G02F2001/392 , H01S3/0092 , H01S3/1083 , H01S3/2391
摘要： The phase sensitive amplifier according to the present invention is a phase sensitive amplifier that uses the optical mixing using a nonlinear optical effect to amplify the signal light. The phase sensitive amplifier according to the present invention includes: the first second-order nonlinear optical element; and the second second-order nonlinear optical element. The first second-order nonlinear optical element causes the fundamental wave light to generate second harmonic light used as pump light and separates only the second harmonic light. The second second-order nonlinear optical element includes a multiplexer to multiplex the signal light with the second harmonic light and spectrally separates only the amplified signal light. The multiplexed signal light and second harmonic light are used subjected to parametric amplification.
摘要翻译：根据本发明的相位敏感放大器是使用非线性光学效应的光学混合放大信号光的相位敏感放大器。根据本发明的相位敏感放大器包括：第一二阶非线性光学元件; 和第二二阶非线性光学元件。第一二阶非线性光学元件使得基波光产生用作泵浦光的二次谐波，并且仅分离二次谐波光。第二二阶非线性光学元件包括多路复用器，用于将信号光与第二谐波光进行多路复用，并且仅对放大的信号光进行光谱分离。复用的信号光和二次谐波光被使用进行参数放大。

4. 发明授权

US07729585B2 Light source apparatus with modulation function and its driving method 有权
标题翻译：具有调制功能的光源装置及其驱动方法
公开(公告)号：US07729585B2
公开(公告)日：2010-06-01
申请号：US11813982
申请日：2006-01-17
申请人： Katsuaki Magari , Tsutomu Yanagawa , Yoshiki Nishida , Hiroyasu Mawatari , Osamu Tadanaga , Masaki Asobe , Hiroyuki Suzuki , Hiroshi Miyazawa , Junji Yumoto
发明人： Katsuaki Magari , Tsutomu Yanagawa , Yoshiki Nishida , Hiroyasu Mawatari , Osamu Tadanaga , Masaki Asobe , Hiroyuki Suzuki , Hiroshi Miyazawa , Junji Yumoto
IPC分类号： G02B6/00 , H04J14/02
CPC分类号： G02F1/3534 , G01J1/32 , G01J3/108 , G01J3/433 , G02B2006/12097 , H01S5/005 , H01S5/0078 , H01S5/0092 , H01S5/4012 , H01S5/4087
摘要： A light source apparatus with modulation function has a wavelength conversion module (75) composed of a nonlinear optical material with a structure having a nonlinear constant modulated periodically. It outputs a difference frequency or sum frequency produced by multiplexing pumping light from semiconductor laser light sources (71) and (72) with different wavelengths through a WDM coupler (74) and by launching the multiplexed light into the optical waveguide. The semiconductor laser light source (72) includes a diffraction grating. The semiconductor laser light source (71) includes a section for modulating output light emitted from its semiconductor laser, and is connected to an external FBG (73) which has a reflection band narrower than a resonance wavelength spacing determined by the device length of the semiconductor laser. The FBG (73) is supplied with the modulated output.
摘要翻译：具有调制功能的光源装置具有由非线性光学材料组成的波长转换模块（75），该非线性光学材料具有周期性非线性恒定调制的结构。输出通过WDM耦合器（74）将来自半导体激光光源（71）和（72）的不同波长的泵浦光复用并通过将复用光发射到光波导中而产生的差频或和频。半导体激光光源（72）包括衍射光栅。半导体激光光源（71）包括用于调制从其半导体激光器发射的输出光的部分，并连接到具有比由半导体器件的器件长度确定的谐振波长间隔窄的反射带的外部FBG（73）激光。 FBG（73）提供调制输出。

5. 发明授权

US07573921B2 Laser light source 有权
标题翻译：激光光源
公开(公告)号：US07573921B2
公开(公告)日：2009-08-11
申请号：US11839409
申请日：2007-08-15
申请人： Junji Yumoto , Osamu Tadanaga , Masaki Asobe , Hiroyuki Suzuki , Kaoru Yoshino , Hiroshi Miyazawa , Yoshiki Nishida , Hirohisa Kanbara , Tsutomu Yanagawa , Eishi Kubota , Hiroyasu Mawatari
发明人： Junji Yumoto , Osamu Tadanaga , Masaki Asobe , Hiroyuki Suzuki , Kaoru Yoshino , Hiroshi Miyazawa , Yoshiki Nishida , Hirohisa Kanbara , Tsutomu Yanagawa , Eishi Kubota , Hiroyasu Mawatari
IPC分类号： H01S3/10
CPC分类号： G02F1/3775 , G01N21/3504 , G01N21/39 , G02F1/3534 , H01S5/4087
摘要： A laser light source is disclosed consisting of first and second lasers that respectively generate laser beams of wavelengths λ1 and λ2. Wavelength λ1 is in the range of 0.9-1.0 μm. A nonlinear optical crystal uses the laser beams of wavelengths λ1 and λ2 as inputs, and outputs a coherent beam having a wavelength λ3 of a difference frequency that satisfies a relationship of 1/λ1−1/λ2=1/λ3. The nonlinear optical crystal has a periodically poled structure of a single period. The wavelength λ3 of the difference frequency varies between 3.1 μm and 2.0 μm when the wavelength λ2 varies between 1.3 μm and 1.8 μm.
摘要翻译：公开了由分别产生波长λ1和λ2的激光束的第一和第二激光器组成的激光源。波长λ1在0.9-1.0μm的范围内。非线性光学晶体使用波长λ1和λ2的激光束作为输入，并且输出具有满足关系1 /λ1-1/λ2= 1 /λ3的差分频率的波长λ3的相干光束。非线性光学晶体具有单周期的周期性极化结构。当波长λ2在1.3μm和1.8μm之间变化时，差频的波长λ3在3.1mum和2.0μm之间变化。

6. 发明申请

US20090303486A1 LIGHT SOURCE AND GAS MEASURING DEVICE 审中-公开
标题翻译：光源和气体测量装置
公开(公告)号：US20090303486A1
公开(公告)日：2009-12-10
申请号：US12306444
申请日：2007-06-20
申请人： Katsuaki Magari , Tsutomu Yanagawa , Toshiki Nishida , Osamu Tadanaga , Masaki Asobe , Takeshi Umeki , Hiroyuki Suzuki
发明人： Katsuaki Magari , Tsutomu Yanagawa , Toshiki Nishida , Osamu Tadanaga , Masaki Asobe , Takeshi Umeki , Hiroyuki Suzuki
IPC分类号： G01N21/61 , H01S3/13 , H01S5/00
CPC分类号： G01N21/39 , G01N21/3504 , G01N2021/399 , G01N2201/06113 , G02F1/3534
摘要： A light source is provided that realizes a single spectral linewidth having a half value width of 1 MHz or less and that is not influenced by the ambient temperature. A light source includes first laser (71) generating first laser light, second laser (12) generating second laser light, and nonlinear optical crystal (13) wherein the first laser light and the second laser light are injected into the nonlinear optical crystal to generate coherent light by the generation of a difference frequency or a sum frequency. The second laser (12) is a wavelength-tunable light source that includes therein a diffraction grating and that can sweep the wavelength of the second laser light. The first laser (71) is composed of semiconductor laser and a fiber grating that has a reflection bandwidth narrower than a resonance wavelength spacing determined by the laser chip length of the semiconductor laser.
摘要翻译：提供一种光源，其实现具有1MHz或更小的半值宽度且不受环境温度影响的单个光谱线宽。光源包括产生第一激光的第一激光器（71），产生第二激光的第二激光器（12）和非线性光学晶体（13），其中第一激光和第二激光被注入到非线性光学晶体中以产生相干光通过产生差频或和频。第二激光器（12）是其中包括衍射光栅并且可以扫描第二激光的波长的波长可调光源。第一激光器（71）由半导体激光器和具有比由半导体激光器的激光器芯片长度确定的谐振波长间隔窄的反射带宽的光纤光栅组成。

7. 发明授权

US07940451B2 Wavelength converter and wavelength conversion apparatus 有权
标题翻译：波长转换器和波长转换装置
公开(公告)号：US07940451B2
公开(公告)日：2011-05-10
申请号：US12440006
申请日：2007-09-28
申请人： Masaki Asobe , Takeshi Umeki , Osamu Tadanaga , Yoshiki Nishida , Tsutomu Yanagawa , Katsuaki Magari , Hiroyuki Suzuki
发明人： Masaki Asobe , Takeshi Umeki , Osamu Tadanaga , Yoshiki Nishida , Tsutomu Yanagawa , Katsuaki Magari , Hiroyuki Suzuki
IPC分类号： G02F1/37
CPC分类号： G02F1/3534 , G02F1/3544 , G02F1/395 , G02F2001/3548 , G02F2201/128
摘要： A wavelength converter which performs simultaneously wavelength conversion for a plurality of input light wavelengths that are unequally intervals, is provided. The nonlinear material of the wavelength converter has a modulation structure which has modulation of a nonlinear optical constant at a period Λ0 in a propagating direction of light, a phase being continuously changed each period Λ0 and a continuous phase modulation for a different period Λph being added to the modulation structure. The nonlinear material has a modulation structure obtained by changing a modulation curve for the phase modulation, wherein a phase mismatch Δβ is represented by Δβ=2π(n3/λ3−n2/λ2−n1/λ1), and at least three peaks at unequally intervals within a plurality of peaks for conversion efficiency represented by 2π/Λ0+2πi/Λf (i=m, m+1, . . . , n: where m and n are positive or negative integers) have highest conversion efficiency.
摘要翻译：提供了对于不等间隔的多个输入光波长同时进行波长转换的波长转换器。波长转换器的非线性材料具有调制结构，该调制结构在光的传播方向上具有在周期Λ0处的非线性光学常数的调制，每个周期Λ0连续地改变相位，并且对不同周期的连续相位调制Λph被添加到调制结构。非线性材料具有通过改变相位调制的调制曲线而获得的调制结构，其中相位失配＆Dgr; 由＆Dgr;＆bgr; = 2＆pgr（n3 /λ3-n2 /λ2-n1 /λ1）表示，并且在由2＆pgr; /Λ0+ 2＆pgr i表示的转换效率的多个峰内的不等间隔处的至少三个峰 /Λf（i = m，m + 1，...，n：其中m和n是正整数或负整数）具有最高的转换效率。

8. 发明授权

US07391795B2 Laser light source 有权
标题翻译：激光光源
公开(公告)号：US07391795B2
公开(公告)日：2008-06-24
申请号：US10531485
申请日：2004-07-30
申请人： Junji Yumoto , Osamu Tadanaga , Masaki Asobe , Hiroyuki Suzuki , Kaoru Yoshino , Hiroshi Miyazawa , Yoshiki Nishida , Hirohisa Kanbara , Tsutomu Yanagawa , Eishi Kubota , Hiroyasu Mawatari
发明人： Junji Yumoto , Osamu Tadanaga , Masaki Asobe , Hiroyuki Suzuki , Kaoru Yoshino , Hiroshi Miyazawa , Yoshiki Nishida , Hirohisa Kanbara , Tsutomu Yanagawa , Eishi Kubota , Hiroyasu Mawatari
IPC分类号： H01S3/10
CPC分类号： G02F1/3775 , G01N21/3504 , G01N21/39 , G02F1/3534 , H01S5/4087
摘要： The invention provides a compact laser light source whose wavelength can be designed freely in a wavelength band in which the semiconductor laser has not been put to practical use by combining an efficient nonlinear optical crystal and high-power semiconductor lasers for optical communication. In one embodiment, the laser light source includes: a first laser for generating a laser beam of a wavelength λ1; a second laser for generating a laser beam of a wavelength λ2; and a nonlinear optical crystal that allows the laser beam of wavelength λ1 and the laser beam of wavelength λ2 as inputs and outputs a coherent beam having a wavelength λ3 of a sum frequency that satisfies a relationship of 1/λ1+1/λ2=1/λ3. The wavelength λ3 of the sum frequency is 589.3±2 nm that is equivalent to the sodium D line.
摘要翻译：本发明提供一种紧凑的激光光源，其波长可以通过组合有效的非线性光学晶体和用于光通信的大功率半导体激光器而在半导体激光器尚未投入实际使用的波长带中自由设计。在一个实施例中，激光光源包括：用于产生波长λ1的激光束的第一激光器; 用于产生波长λ2的激光束的第二激光器; 以及允许波长λ1的激光束和波长λ2的激光束作为输入的非线性光学晶体，并输出具有波长λ< 3和满足1 /λ1 + 1 /λ2/1 /λ3 3的关系的和频。和频率的波长λ3 <3 SUB是相当于钠D线的589.3±2nm。

9. 发明授权

US06806986B2 Wavelength converter and wavelength converting apparatus 失效
标题翻译：波长转换器和波长转换装置
公开(公告)号：US06806986B2
公开(公告)日：2004-10-19
申请号：US10456073
申请日：2003-06-06
申请人： Masaki Asobe , Osamu Tadanaga , Hiroshi Miyazawa , Yoshiki Nishida , Hiroyuki Suzuki
发明人： Masaki Asobe , Osamu Tadanaga , Hiroshi Miyazawa , Yoshiki Nishida , Hiroyuki Suzuki
IPC分类号： G02F101
CPC分类号： G02F1/3775 , G02F1/3534 , G02F2001/3548
摘要： A wavelength converter has a phase modulated periodically modulated structure, where a nonlinear optical coefficient is periodically modulated at a fundamental period &Lgr;0 and the phase of the modulation varies nearly continuously, and the phase variation of the modulation unit structure is repeated at a period &Lgr;ph (>&Lgr;0). A conversion efficiency is made maximum when a phase mismatch amount &Dgr;&bgr; equals 2&pgr;/&Lgr;0±2&pgr;i/&Lgr;ph (i=0, 1, . . . , n, where n is a positive integer), 2&pgr;/&Lgr;0±2&pgr;(2i+1)/&Lgr;ph (i=0, 1, . . . , n), or 2&pgr;/&Lgr;0+2&pgr;i/&Lgr;f (i=m, m+1, . . . . n, where m and n are positive or negative integers satisfying |m|≠|n|), thereby providing a wavelength converter and wavelength converting apparatus that can be designed to be able to cope with a desired number of pump wavelengths, prevent the reduction in the conversion efficiency, and be configured easily using a practical size of a nonlinear optical material.
摘要翻译：波长转换器具有相位调制的周期性调制结构，其中非线性光学系数在基本周期λλ周期性地调制，并且调制相位几乎连续变化，并且调制单元结构的相位变化在时间段Lambdaph（ > Lambda0）。当相位不匹配量Deltabeta等于2pi / Lambda0±2pii / Lambdaph（i = 0,1，...，n，其中n为正整数），2pi / Lambda0±2pi（2i + 1）时，转换效率最大）/ Lambdaph（i = 0,1，...，n）或2pi / Lambda0 + 2pii / Lambdaf（i = m，m + 1，...，n，其中m和n是满足 | m | <> | n |），从而提供可被设计为能够处理期望数量的泵浦波长的波长转换器和波长转换装置，防止转换效率的降低，并且可以容易地使用非线性光学材料的实际尺寸。

10. 发明申请

US20100039699A1 Wavelength Converter and Wavelength Conversion Apparatus 有权
标题翻译：波长转换器和波长转换装置
公开(公告)号：US20100039699A1
公开(公告)日：2010-02-18
申请号：US12440006
申请日：2007-09-28
申请人： Masaki Asobe , Takeshi Umeki , Osamu Tadanaga , Yoshiki Nishida , Tsutomu Yanagawa , Katsuaki Magari , Hiroyuki Suzuki
发明人： Masaki Asobe , Takeshi Umeki , Osamu Tadanaga , Yoshiki Nishida , Tsutomu Yanagawa , Katsuaki Magari , Hiroyuki Suzuki
IPC分类号： G02F1/39 , G02F1/37
CPC分类号： G02F1/3534 , G02F1/3544 , G02F1/395 , G02F2001/3548 , G02F2201/128
摘要： A wavelength converter which performs simultaneously wavelength conversion for a plurality of input light wavelengths that are unequally intervals, is provided. The nonlinear material of the wavelength converter has a modulation structure which has modulation of a nonlinear optical constant at a period Λ0 in a propagating direction of light, a phase being continuously changed each period Λ0 and a continuous phase modulation for a different period Λph being added to the modulation structure. The nonlinear material has a modulation structure obtained by changing a modulation curve for the phase modulation, wherein a phase mismatch Δβ is represented by Δβ=2π(n3/λ3−n2/λ2−n1/λ1), and at least three peaks at unequally intervals within a plurality of peaks for conversion efficiency represented by 2π/Λ0+2πi/Λf (i=m, m+1, . . . , n: where m and n are positive or negative integers) have highest conversion efficiency.
摘要翻译：提供了对于不等间隔的多个输入光波长同时进行波长转换的波长转换器。波长转换器的非线性材料具有调制结构，该调制结构在光的传播方向上具有在周期Λ0处的非线性光学常数的调制，每个周期Λ0连续地改变相位，并且对不同周期的连续相位调制Λph被添加到调制结构。非线性材料具有通过改变相位调制的调制曲线而获得的调制结构，其中相位失配＆Dgr; 由＆Dgr;＆bgr; = 2＆pgr;（n3 /λ3-n2 /λ2-n1 /λ1）表示，并且在由2＆pgr; /Λ0+ 2＆pgr i表示的转换效率的多个峰内以不等间隔的至少三个峰 /Λf（i = m，m + 1，...，n：其中m和n是正整数或负整数）具有最高的转换效率。

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