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1. 发明授权

US08170071B2 Laser apparatus 有权
标题翻译：激光设备
公开(公告)号：US08170071B2
公开(公告)日：2012-05-01
申请号：US12398191
申请日：2009-03-05
申请人： Masataka Nakazawa , Akihito Suzuki , Toshihiko Hirooka , Masato Yoshida , Kazunori Shiota
发明人： Masataka Nakazawa , Akihito Suzuki , Toshihiko Hirooka , Masato Yoshida , Kazunori Shiota
IPC分类号： H01S3/30
CPC分类号： H01S3/0675 , H01S3/06712 , H01S3/06791 , H01S3/08031 , H01S3/09415 , H01S3/1608 , H01S3/1693
摘要： Provided is a laser apparatus including: a DFB fiber laser 40 including, as an amplitude medium, a rare earth doped silica optical fiber codoped with a high concentration of aluminum; an optical feedback path 50 formed by a ring-shaped optical fiber; and an optical coupler 70 a) feeding back a part of an output of the DFB fiber laser 40 to the DFB fiber laser 40 via the optical feedback path 50, and b) outputting, to outside, another part of the output of the DFB fiber laser 40, where the optical fiber forming the optical feedback path 50 is longer than a length at which a relaxation oscillation noise in the output to the outside becomes −110 dB/Hz.
摘要翻译：提供了一种激光装置，其包括：DFB光纤激光器40，其包括作为振幅介质的掺杂有高浓度铝的稀土掺杂二氧化硅光纤; 由环形光纤形成的光学反馈路径50; 和光耦合器70a）经由光反馈路径50将DFB光纤激光器40的输出的一部分反馈到DFB光纤激光器40，以及b）向DFB光纤输出的另一部分输出外部激光器40，其中形成光学反馈路径50的光纤比输出到外部的弛豫振荡噪声变为-110dB / Hz的长度长。

2. 发明授权

US07898733B2 Laser oscillator 有权
标题翻译：激光振荡器
公开(公告)号：US07898733B2
公开(公告)日：2011-03-01
申请号：US12422758
申请日：2009-04-13
申请人： Kazunori Shiota , Shin Masuda , Masataka Nakazawa , Masato Yoshida
发明人： Kazunori Shiota , Shin Masuda , Masataka Nakazawa , Masato Yoshida
IPC分类号： H04B10/17 , H01S3/00
CPC分类号： H01S3/06791 , H01S3/0675 , H01S3/08 , H01S3/094042 , H01S3/1109 , H01S3/1118
摘要： A laser oscillator includes a ring resonator. The ring resonator includes an optical circulator having first, second, third, and fourth ports and a first optical amplification fiber connected to the optical circulator. Light incident on the first port is exited from the second port, and light incident on the second port is exited from the third port. The fourth port provides an exciting light and injects the exciting light into the ring resonator through the first port. The first optical amplification fiber amplifies light exited from the third port with the exciting light provided by the fourth port. The laser oscillator also includes an optical member connected to the optical circulator. The optical member reflects at least a part of the light exited from the second port and injects the same into the second port again.
摘要翻译：激光振荡器包括环形谐振器。环形谐振器包括具有第一，第二，第三和第四端口的光循环器和连接到光循环器的第一光放大光纤。第一个港口的光线从第二个港口出发，第二个港口的光线从第三个港口出来。第四个端口提供激发光，并通过第一个端口将激发光注入环形谐振器。第一光放大光纤利用由第四端口提供的激发光放大从第三端口退出的光。激光振荡器还包括连接到光循环器的光学构件。光学构件反射从第二端口退出的光的至少一部分，并再次将其注入第二端口。

3. 发明授权

US07747175B2 Optical transmission method and optical transmission apparatus 失效
标题翻译：光传输方法和光传输装置
公开(公告)号：US07747175B2
公开(公告)日：2010-06-29
申请号：US10543342
申请日：2004-01-23
申请人： Toshihiko Hirooka , Masataka Nakazawa
发明人： Toshihiko Hirooka , Masataka Nakazawa
IPC分类号： G02B26/00
CPC分类号： H04B10/25137 , H04B10/25133
摘要： To compensate a waveform distortion by using a nature that a spectral shape is perfectly retained even if all the linear distortions occur on a time-axis. An optical pulse transmitted from an optical pulse transmitter (1) via an optical fiber transmission line (2) is transmitted. An optical Fourier transformer (3) receives an optical pulse, and optically Fourier-transforms an optical pulse on a time-axis onto a frequency-axis to reproduce the frequency spectrum of an optical pulse on a time-axis be effecting switching between frequency and time, thereby compensating a waveform distortion by a linear effect on the optical fiber transmission line (2). A photodetector (4) receives an optical pulse from the optical Fourier transformer (3) and transforms this into an electrical signal to thereby obtain a pulse waveform before a transmission over the optical fiber transmission line (2).
摘要翻译：通过使用即使在时间轴上出现所有线性失真也能完全保留光谱形状的性质来补偿波形失真。发射经由光纤传输线（2）从光脉冲发射器（1）发射的光脉冲。光傅里叶变换器（3）接收光脉冲，并且将时间轴上的光脉冲光学傅里叶变换到频率轴上，以在时间轴上再现光脉冲的频谱，正在进行频率与从而通过对光纤传输线（2）的线性效应来补偿波形失真。光检测器（4）从光傅里叶变换器（3）接收光脉冲，并将其转换为电信号，从而在通过光纤传输线（2）传输之前获得脉搏波形。

4. 发明授权

US07672593B2 OTDM transmission method and apparatus 有权
标题翻译： OTDM传输方法和装置
公开(公告)号：US07672593B2
公开(公告)日：2010-03-02
申请号：US10562163
申请日：2004-03-23
申请人： Toshihiko Hirooka , Masataka Nakazawa
发明人： Toshihiko Hirooka , Masataka Nakazawa
IPC分类号： H04J11/00
CPC分类号： H04B10/503 , H04J14/08
摘要： An OTDM transmitting method and transmitter realizing an OTDM distortion-free transmission substantially not relying upon dispersion. A time division multiplexed OTDM signal from an OTDM signal transmitter (1) enters an optical Fourier transform unit (2). Optical Fourier transform can be carried out most accurately so long as the optical pulse is a chirp-free Fourier transform limit pulse. The optical Fourier transform unit (2) converts the time waveform of the pulse into a signal on the frequency axis, and an optical inverse Fourier transform unit (2′) converts a spectral shape on the frequency axis into a time waveform (pulse). An optical fiber transmission line (3) is a transmission line having an arbitrary dispersion and a polarization mode dispersion. These dispersions may involve a time variation. An OTDM signal receiver (4) demultiplexes a transmission signal into low-speed optical signals, in a light region, receives optical pulses for respective channels and converts them into electric signals.
摘要翻译：实现基本上不依赖于色散的OTDM无失真传输的OTDM发送方法和发射机。来自OTDM信号发射机（1）的时分复用OTDM信号进入光傅立叶变换单元（2）。只要光脉冲是无啁啾的傅里叶变换极限脉冲，光学傅里叶变换就可以进行最精确。光学傅立叶变换单元（2）将脉冲的时间波形转换为频率轴上的信号，光学傅里叶逆变换单元（2'）将频率轴上的频谱形状转换为时间波形（脉冲）。光纤传输线（3）是具有任意色散和偏振模色散的传输线。这些分散体可能涉及时间变化。 OTDM信号接收机（4）将发送信号解复用为低速光信号，在光区域中，接收各通道的光脉冲并将其转换为电信号。

5. 发明授权

US07352504B2 Optical fourier transform device and method 有权
标题翻译：光学傅立叶变换装置及方法
公开(公告)号：US07352504B2
公开(公告)日：2008-04-01
申请号：US10584932
申请日：2004-12-27
申请人： Toshihiko Hirooka , Masataka Nakazawa
发明人： Toshihiko Hirooka , Masataka Nakazawa
IPC分类号： G02F1/35 , G02F2/02
CPC分类号： G02F1/3515 , G01J11/00
摘要： Optical Fourier transform is executed over a wide time range. A quadratic function type optical pulse generator (7) generates a control light pulse of a shape expressed by a quadratic function or a parabola according to a clock signal based on a signal light pulse from an optical coupler (1). The signal light pulse inputted is multiplexed by a multiplexer (9) with the control light pulse optically delayed by an optical delay element (8) so that the timing is matched with the signal light pulse, and introduced into an optical Kerr medium (10). In the optical Kerr medium (10), the signal light pulse inputted by the mutual phase modulation between the signal light pulse and the control light pulse is subjected to a linear phase modulation (frequency chirp) over the entire pulse or a wide time range. After that, the signal light pulse isolated by an optical filter (11) is introduced into the dispersion medium (12) having a group velocity dispersion (secondary dispersion), thereby converting the time waveform of the inputted signal light pulse into the shape of the frequency spectrum.
摘要翻译：光学傅里叶变换在较宽的时间范围内执行。二次函数型光脉冲发生器（7）根据来自光耦合器（1）的信号光脉冲的时钟信号产生由二次函数或抛物线表示的形状的控制光脉冲。输入的信号光脉冲由多路复用器（9）与由光延迟元件（8）光延迟的控制光脉冲进行复用，使得定时与信号光脉冲匹配，并被引入光学克尔介质（10）。在光学克尔介质（10）中，通过信号光脉冲和控制光脉冲之间的相位调制输入的信号光脉冲在整个脉冲或宽时间范围内经受线性相位调制（频率啁啾）。之后，将由滤光器（11）隔离的信号光脉冲引入到具有组速度色散（二次色散）的分散介质（12）中，从而将输入的信号光脉冲的时间波形转换为频谱。

6. 发明申请

US20050165571A1 Measuring-instrument remote-calibtration system and measuring-instrument remote-calibtration method 审中-公开
标题翻译：测量仪器远程校准系统和测量仪器远程校准方法
公开(公告)号：US20050165571A1
公开(公告)日：2005-07-28
申请号：US11076008
申请日：2005-03-10
申请人： Haruo Yoshida , Hirokazu Matsumoto , Yoshio Hino , Masaru Arai , Masataka Nakazawa
发明人： Haruo Yoshida , Hirokazu Matsumoto , Yoshio Hino , Masaru Arai , Masataka Nakazawa
IPC分类号： G08C25/00 , G01D18/00 , G06F19/00
CPC分类号： G01D18/00
摘要： In a measuring-instrument remote-calibration system and measuring-instrument remote-calibration method, a measuring standard quantity is converted into a parameter adapted for communication, or based on measuring standard quantity, a parameter adapted for communication is generated and sent to a remote place. Alternatively, when the measuring standard quantity is not suitable for communication, it is converted into a form adapted for transportation and the converted measuring standard quantity is sent to a remote place. After the converted measuring standard quantity reaches the place, it is restored to the original measuring standard quantity, thus enabling calibration. The result of the calibration is certified.
摘要翻译：在测量仪器远程校准系统和测量仪器远程校准方法中，将测量标准量转换为适合通信的参数，或者根据测量标准量，生成适用于通信的参数并发送到远程地点。或者，当测量标准量不适于通信时，将其转换为适于运输的形式，并将转换的测量标准量发送到偏远的地方。转换后的测量标准量到达该位置后，恢复为原始测量标准量，从而进行校准。校准的结果经过认证。

7. 发明授权

US06795614B2 Method of making phase mask for machining optical fiber and optical fiber having bragg diffraction grating produced using the phase mask for machining optical fiber 失效
$Method of making phase mask for machining optical fiber and optical fiber having bragg diffraction grating produced using the phase mask for machining optical fiber$
标题翻译：制造用于加工光纤的相位掩模和具有使用用于加工光纤的相位掩模制造的布拉格衍射光栅的光纤的方法
公开(公告)号：US06795614B2
公开(公告)日：2004-09-21
申请号：US10019847
申请日：2001-10-25
申请人： Toshikazu Segawa , Masaaki Kurihara , Tetsuro Komukai , Masataka Nakazawa
发明人： Toshikazu Segawa , Masaaki Kurihara , Tetsuro Komukai , Masataka Nakazawa
IPC分类号： G02B634
CPC分类号： G02B6/02138 , G02B6/02085 , G02B6/124 , G02B2006/12107 , G03F1/34 , G03F7/001 , G03F7/70325 , G03F7/7035 , G03F7/70383 , G03F7/70475
摘要： The present invention relates to a method of producing an optical fiber-processing phase mask having minimized connection errors that may degrade the spectral line shape and group delay characteristics of an optical fiber diffraction grating fabricated by using the phase mask. The present invention provides a method of producing an optical fiber-processing phase mask having a repeating pattern of grating-shaped grooves and strips provided on one surface of a transparent substrate, so that diffracted light produced by the repeating pattern is applied to an optical fiber to fabricate a diffraction grating in the optical fiber by interference fringes of diffracted light of different orders. In making a mask having a plurality of juxtaposed patterns (P1 to P5) having a linearly or nonlinearly increasing or decreasing pitch and a uniform groove-strip width ratio, multiple exposure is carried out to minimize difference between the pitch at the joint between patterns having different pitch data and the pitch in each individual pattern.
摘要翻译：本发明涉及一种制造光纤处理相位掩模的方法，其具有最小化的连接误差，其可能降低通过使用相位掩模制造的光纤衍射光栅的谱线形状和群延迟特性。本发明提供一种制造光纤加工相位掩模的方法，该光纤加工相位掩模具有设置在透明基板的一个表面上的光栅形状的槽和条带的重复图案，从而将由重复图案产生的衍射光施加到光纤通过不同阶数的衍射光的干涉条纹在光纤中制造衍射光栅。在具有多个具有线性或非线性增加或减小间距的均匀图案（P1至P5）的掩模和均匀的槽带宽度比时，进行多次曝光以最小化在具有不同的音调数据和每个单独模式的音调。

8. 发明授权

US5432131A Lead-containing fluoride glass, optical fiber and process for producing it 失效
标题翻译：含铅氟化玻璃，光纤及其生产工艺
公开(公告)号：US5432131A
公开(公告)日：1995-07-11
申请号：US55024
申请日：1993-04-30
申请人： Takashi Kogo , Hiroo Kanamori , Masashi Onishi , Yoshiaki Miyajima , Masataka Nakazawa
发明人： Takashi Kogo , Hiroo Kanamori , Masashi Onishi , Yoshiaki Miyajima , Masataka Nakazawa
IPC分类号： C03B37/012 , C03C3/32 , C03C13/04 , G02B6/00
CPC分类号： C03C3/325 , C03B37/01211 , C03B37/01268 , C03C13/042 , C03B2201/82 , C03B2203/24 , Y10T428/2929 , Y10T428/2933 , Y10T428/2958 , Y10T428/2964
摘要： Lead-containing fluoride glass comprises 50-70 mol % of ZrF.sub.4, 3-5 mol % of LaF.sub.3, 0.1-3 mol % of YF.sub.3, and 2-15 mol % of NaF and/or LiF and/or CsF, where LaF.sub.3 +YF.sub.3 =4.5-6 mol %, and further comprises lead. An optical fiber comprises a core made of the lead-containing fluoride glass and a cladding surrounding the core. A process for producing an optical fiber comprises forming a base material for a core of the lead-containing fluoride glass, forming a base material for a cladding of fluoride glass containing 30-60 mol % of HfF.sub.4, and drawing the base materials into an optical fiber at a drawing temperature of 315.degree.-340.degree. C.
摘要翻译：含铅氟化物玻璃包含50-70摩尔％的ZrF 4，3-5摩尔％的LaF 3，0.1-3摩尔％的YF 3和2-15摩尔％的NaF和/或LiF和/或CsF，其中LaF 3 + YF3 = 4.5-6mol％，进一步包含铅。光纤包括由含铅氟化物玻璃制成的芯和围绕芯的包层。一种制造光纤的方法包括：形成含铅氟化物玻璃的芯的基材，形成含有30-60摩尔％HfF 4的氟化物玻璃的包层用基材，将该基材拉伸成光学纤维在315°-340℃的拉伸温度

9. 发明授权

US07715724B2 Optical synchronizer 有权
标题翻译：光同步器
公开(公告)号：US07715724B2
公开(公告)日：2010-05-11
申请号：US11057365
申请日：2005-02-15
申请人： Shigeki Watanabe , Masataka Nakazawa
发明人： Shigeki Watanabe , Masataka Nakazawa
IPC分类号： H04B10/00
CPC分类号： H04B10/25137
摘要： The phase modulation in which the frequency chirp becomes 0 at the timing which the user wants to synchronize, and the frequency chirp becomes larger as the time deviates in a positive or negative direction from this timing is applied to the signal light with each wavelength comprising pulse train of different timing. Thus, the optical pulses which deviate from the timing which the user wants to synchronize receive the frequency chirp in accordance with the amount of the timing deviation. The WDM signal light which has been chirped in this way is made to pass a linear dispersive medium, and the dispersion fit for the amount of frequency chirp is made to be given. By adjusting the amount of dispersion, it is possible to obtain the pulses which conform to the timing at which the user wants to synchronize the pulses of each wavelength.
摘要翻译：在用户想要同步的定时，频率啁啾变为0的相位调制，并且随着从该定时向正或负方向偏离的时间，频率啁啾变大，对每个波长包括脉冲的信号光不同时间的火车因此，偏离用户想要同步的定时的光脉冲根据定时偏差量接收频率啁啾声。已经以这种方式啁啾的WDM信号光通过线性色散介质，并且给出了频率啁啾量的色散配合。通过调整色散量，可以获得符合用户想要使每个波长的脉冲同步的定时的脉冲。

10. 发明申请

US20100067100A1 LASER OSCILLATOR 有权
标题翻译：激光振荡器
公开(公告)号：US20100067100A1
公开(公告)日：2010-03-18
申请号：US12422758
申请日：2009-04-13
申请人： Kazunori Shiota , Shin Masuda , Masataka Nakazawa , Masato Yoshida
发明人： Kazunori Shiota , Shin Masuda , Masataka Nakazawa , Masato Yoshida
IPC分类号： H04B10/17 , H01S3/00
CPC分类号： H01S3/06791 , H01S3/0675 , H01S3/08 , H01S3/094042 , H01S3/1109 , H01S3/1118
摘要： A laser oscillator includes a ring resonator. The ring resonator includes an optical circulator having first, second, third, and fourth ports and a first optical amplification fiber connected to the optical circulator. Light incident on the first port is exited from the second port, and light incident on the second port is exited from the third port. The fourth port provides an exciting light and injects the exciting light into the ring resonator through the first port. The first optical amplification fiber amplifies light exited from the third port with the exciting light provided by the fourth port. The laser oscillator also includes an optical member connected to the optical circulator. The optical member reflects at least a part of the light exited from the second port and injects the same into the second port again.
摘要翻译：激光振荡器包括环形谐振器。环形谐振器包括具有第一，第二，第三和第四端口的光循环器和连接到光循环器的第一光放大光纤。第一个港口的光线从第二个港口出发，第二个港口的光线从第三个港口出来。第四个端口提供激发光，并通过第一个端口将激发光注入环形谐振器。第一光放大光纤利用由第四端口提供的激发光放大从第三端口退出的光。激光振荡器还包括连接到光循环器的光学构件。光学构件反射从第二端口退出的光的至少一部分，并再次将其注入第二端口。

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