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1. 发明授权

US5822112A Control apparatus for optical amplifier 失效
标题翻译：光放大器控制装置
公开(公告)号：US5822112A
公开(公告)日：1998-10-13
申请号：US630074
申请日：1996-04-15
申请人： Hiroyuki Itou , Michikazu Shima , Yoshihito Onoda , Yuji Tamura
发明人： Hiroyuki Itou , Michikazu Shima , Yoshihito Onoda , Yuji Tamura
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/10 , H01S3/13 , H01S3/131 , H04B10/07 , H04B10/29 , H04B10/294 , H04B10/12
CPC分类号： H01S3/1301 , H01S3/06754 , H01S3/10015 , H01S3/1305
摘要： A control apparatus for an optical amplifier such as an erbium-doped optical-fiber (EDF) amplifier suppresses overshooting of ALC control at power on and at the time of input light restoration from an off condition, while ensuring quick starting. At power on and at the time of input light restoration from an off condition, an idling current (IDC) reference value generating circuit generates an IDC reference voltage that increases to a value sufficiently greater than a value in a normal operating condition with a time constant corresponding to a rise time of the EDF, and thereby controls a laser diode for pumping the EDF. The voltage may be set to a value larger than the value in the normal operating condition for a predetermined period of time by using a timer.
摘要翻译：用于诸如掺铒光纤（EDF）放大器的光放大器的控制装置在确保快速启动的同时，抑制上电时和从关闭状态输入光恢复时的ALC控制的过冲。在上电时和从关闭状态输入光恢复时，怠速电流（IDC）参考值产生电路产生IDC参考电压，该电压增加到充分大于正常工作状态下的时间常数值对应于EDF的上升时间，从而控制用于泵浦EDF的激光二极管。通过使用定时器，将电压设定为大于正常工作状态的值达预定时间段的值。

2. 发明授权

US5798857A Auxiliary-signal transmission system 失效
标题翻译：辅助信号传输系统
公开(公告)号：US5798857A
公开(公告)日：1998-08-25
申请号：US786692
申请日：1997-01-22
申请人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
发明人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
IPC分类号： H04B10/077 , H04B10/29 , H04B10/291 , H04B10/516 , H04B10/61 , H04B10/06
CPC分类号： H04B10/291 , H04B10/077 , H04B10/2912 , H04B10/2931 , H04B2210/078
摘要： Spontaneous emission occurring in association with direct optical amplification using an erbium-doped optical fiber is modulated with an auxiliary signal, such as a supervisory signal, for transmission of the auxiliary signal. In a first aspect of the invention, the output of an optical amplifier is passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, to modulate the spontaneous emission component contained in the optical amplifier output. In a second aspect of the invention, the output of the optical amplifier is separated by an optical branching device into a main optical signal and part of the spontaneous emission. The separated spontaneous emission component is modulated by being passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, and then, the modulated spontaneous emission component is wavelength-division multiplexed with the main optical signal.
摘要翻译：使用掺铒光纤与直接光放大相关联发生的自发发射用辅助信号（例如监控信号）进行调制，用于传输辅助信号。在本发明的第一方面中，光放大器的输出通过可变光带通滤波器，其传输特性根据辅助信号而变化，以调制光放大器输出中包含的自发发射分量。在本发明的第二方面中，光放大器的输出由光分支装置分离为主光信号和部分自发发射。分离的自发发射分量通过通过可变光带通滤波器进行调制，该可变光带通滤波器的传输特性根据辅助信号而变化，然后调制的自发发射分量与主光信号进行波分复用。

3. 发明授权

US6055094A Optical amplifying apparatus 有权
标题翻译：光放大装置
公开(公告)号：US6055094A
公开(公告)日：2000-04-25
申请号：US143404
申请日：1998-08-28
申请人： Michikazu Shima , Hiroshi Nishimoto
发明人： Michikazu Shima , Hiroshi Nishimoto
IPC分类号： H04B10/2507 , H04B10/07 , H04B10/25 , H04B10/29 , H04B10/293 , H04B10/294 , H04B10/564 , H04B10/572 , H04J14/02 , H01S3/00
CPC分类号： H04B10/2942 , H04B10/2912 , H04B10/2935 , H04J14/02 , H04B2210/003 , H04B2210/256
摘要： The object of the present invention is to provide an optical amplifying apparatus for collectively amplifying wavelength-division multiplexed signal lights, which can perform amplification in response to input signal light, whose power level is within a wide input dynamic range, without saturating, and which suppresses the influence of the wavelength dependency of gain thereof. Thus, this optical amplifying apparatus is composed of: three optical amplifying portions connected in cascade; an optical attenuating portion for controlling the level of signal light output from the optical amplifying portion provided in the post-stage by regulating the power level of signal light input to the optical amplifying portion provided in the middle stage; and a dispersion compensation fiber provided between the middle stage and post stage optical amplifying. A gain of each of the optical amplifying portions is controlled to be constant by an AGC circuit. As a result of providing the optical amplifying portions in a three-stage constitution, the gain of optical amplifying portion provided in the first stage can be set at a low value. Thus, even when a signal light having a high power level is input, the first stage optical amplifying portion does not saturate. Consequently, the gain is controlled to be constant.
摘要翻译：本发明的目的是提供一种用于共同放大波分复用信号光的光放大装置，其可以响应于功率水平处于宽输入动态范围内的输入信号光进行放大，而不会饱和，并且哪个抑制其增益的波长依赖性的影响。因此，该光放大装置由以下三个组成：串联连接的三个光放大部分; 光衰减部分，用于通过调节输入到设置在中间级的光放大部分的信号光的功率电平来控制从后级设置的光放大部分输出的信号光的电平; 以及设置在中间级和后级光放大之间的色散补偿光纤。每个光放大部分的增益被AGC电路控制为恒定。作为以三级结构提供光放大部分的结果，可以将设置在第一级中的光放大部分的增益设置为低值。因此，即使当输入具有高功率电平的信号光时，第一级光放大部分也不饱和。因此，增益被控制为恒定。

4. 发明授权

US5604759A Drive circuit for electronic device 失效
标题翻译：电子设备驱动电路
公开(公告)号：US5604759A
公开(公告)日：1997-02-18
申请号：US10285
申请日：1993-01-28
申请人： Yuji Miyaki , Michikazu Shima
发明人： Yuji Miyaki , Michikazu Shima
IPC分类号： G05B11/30 , G05D23/20 , G05D25/02 , H01L35/00 , H01S3/094 , H01S3/0941 , H01S5/042 , H02M3/155 , H05B6/06 , H05B33/08 , H01S3/103
CPC分类号： H02M7/5387 , H01S5/042 , H02M3/155 , H05B33/0803 , H05B6/06 , H01S5/0428
摘要： A drive circuit drives an electronic device that converts electric power into light or heat energy. The drive circuit has a switch connected to the electronic device in series, and a control circuit for providing, in response to an input control signal, a pulse modulation signal for controlling the switch. The frequency of the pulse modulation signal is higher than the response frequency of the electronic device. Alternatively, the drive circuit may have first to fourth switches disposed on both sides of the electronic device, for passing a current in different directions through the electronic device, and a control circuit for controlling the switches to change the direction and magnitude of the average of the current flowing through the electronic device in response to an input control signal.
摘要翻译：驱动电路驱动将电力转换成光或热能的电子设备。驱动电路具有串联连接到电子设备的开关，以及用于响应于输入控制信号提供用于控制开关的脉冲调制信号的控制电路。脉冲调制信号的频率高于电子设备的响应频率。或者，驱动电路可以具有设置在电子设备两侧的第一至第四开关，用于使不同方向的电流通过电子设备;以及控制电路，用于控制开关以改变平均值的方向和幅度响应于输入控制信号流过电子设备的电流。

5. 发明授权

US5764404A Wavelength-division-multiplexing optical amplifier 失效
标题翻译：波分复用光放大器
公开(公告)号：US5764404A
公开(公告)日：1998-06-09
申请号：US508471
申请日：1995-07-28
申请人： Kazuo Yamane , Michikazu Shima , Yumiko Kawasaki , Kenji Tagawa , Shinya Inagaki , Norifumi Shukunami
发明人： Kazuo Yamane , Michikazu Shima , Yumiko Kawasaki , Kenji Tagawa , Shinya Inagaki , Norifumi Shukunami
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/094 , H01S3/10 , H01S3/13 , H01S3/17 , H04B10/07 , H04B10/2537 , H04B10/296 , H04J14/00 , H04J14/02 , H01S3/16 , H04B10/12
CPC分类号： H04B10/296 , H01S3/1301 , H04B10/291 , H04B10/2942 , H04J14/0221 , H01S2302/00 , H01S2303/00 , H01S3/094096
摘要： An optical amplifier amplifies a wavelength division-multiplexed optical input signal composed of optical signals having different wavelengths such that the output level of each of the optical signal is always optimized and such that the difference between the gains of the amplifier on the optical signals is minimized when the number of optical signals is two. The output level of the amplifier is controlled according to the number of the optical signals, to optimize the output level of each of the optical signals.
摘要翻译：光放大器放大由具有不同波长的光信号组成的波分复用光输入信号，使得每个光信号的输出电平始终被优化，并使得放大器在光信号上的增益之间的差最小化当光信号数为2时。根据光信号的数量控制放大器的输出电平，以优化每个光信号的输出电平。

6. 发明授权

US5841558A Auxiliary-signal transmission system 失效
公开(公告)号：US5841558A
公开(公告)日：1998-11-24
申请号：US787391
申请日：1997-01-22
申请人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
发明人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
IPC分类号： H04B10/077 , H04B10/29 , H04B10/291 , H04B10/516 , H04B10/61 , H04B10/16
CPC分类号： H04B10/291 , H04B10/077 , H04B10/2912 , H04B10/2931 , H04B2210/078
摘要： Spontaneous emission occurring in association with direct optical amplification using an erbium-doped optical fiber is modulated with an auxiliary signal, such as a supervisory signal, for transmission of the auxiliary signal. In a first aspect of the invention, the output of an optical amplifier is passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, to modulate the spontaneous emission component contained in the optical amplifier output. In a second aspect of the invention, the output of the optical amplifier is separated by an optical branching device into a main optical signal and part of the spontaneous emission. The separated spontaneous emission component is modulated by being passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, and then, the modulated spontaneous emission component is wavelength-division multiplexed with the main optical signal.

7. 发明授权

US5680246A Optical amplifier and optical transmission apparatus 失效
标题翻译：光放大器和光传输装置
公开(公告)号：US5680246A
公开(公告)日：1997-10-21
申请号：US412290
申请日：1995-03-28
申请人： Tsukasa Takahashi , Hiroyuki Itou , Yuji Tamura , Michikazu Shima , Kazuo Yamane , Yumiko Kawasaki , Keisuke Imai , Yoshinori Ohkuma , Kazuhiro Suzuki , Yasunori Nagakubo , Takashi Tsuda , Yuji Miyaki
发明人： Tsukasa Takahashi , Hiroyuki Itou , Yuji Tamura , Michikazu Shima , Kazuo Yamane , Yumiko Kawasaki , Keisuke Imai , Yoshinori Ohkuma , Kazuhiro Suzuki , Yasunori Nagakubo , Takashi Tsuda , Yuji Miyaki
IPC分类号： H01S3/07 , H01S3/06 , H01S3/067 , H01S3/10 , H01S3/13 , H01S3/131 , H04B10/07 , H04B10/2507 , H04B10/29 , H04B10/293 , H04B10/564 , H04B10/572 , H01S3/00
CPC分类号： H04B10/564 , H01S3/1301 , H04B10/077 , H04B10/07955 , H04B10/2912 , H04B10/2931 , H01S3/06754
摘要： The optical amplifier includes a doped fiber doped with a rare earth element, a pumping light source, means for introducing signal light and pumping light into the doped fiber, detection means for detecting whether or not amplified signal light is included in light outputted from the doped fiber, and means for decreasing the intensity of the pumping light when it is detected that amplified signal light is not included. It can be possible to eliminate an influence of an optical surge arising from a characteristic of the doped fiber.
摘要翻译：光放大器包括掺杂有稀土元素的掺杂光纤，泵浦光源，用于将信号光和泵浦光引入掺杂光纤的装置，用于检测放大信号光是否包含在从掺杂光光纤，以及当检测到不包括放大信号光时降低泵浦光强度的装置。可以消除由掺杂光纤的特性引起的光学浪涌的影响。

8. 发明授权

US5625481A Auxiliary-signal transmission system 失效
标题翻译：辅助信号传输系统
公开(公告)号：US5625481A
公开(公告)日：1997-04-29
申请号：US388357
申请日：1995-02-14
申请人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
发明人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
IPC分类号： H04B10/077 , H04B10/29 , H04B10/291 , H04B10/516 , H04B10/61 , H04B10/16 , H01S3/00 , H04B10/02
CPC分类号： H04B10/291 , H04B10/077 , H04B10/2912 , H04B10/2931 , H04B2210/078
摘要： Spontaneous emission occurring in association with direct optical amplification using an erbium-doped optical fiber is modulated with an auxiliary signal, such as a supervisory signal, for transmission of the auxiliary signal. In a first aspect of the invention, the output of an optical amplifier is passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, to modulate the spontaneous emission component contained in the optical amplifier output. In a second aspect of the invention, the output of the optical amplifier is separated by an optical branching device into a main optical signal and part of the spontaneous emission. The separated spontaneous emission component is modulated by being passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, and then, the modulated spontaneous emission component is wavelength-division multiplexed with the main optical signal.
摘要翻译：使用掺铒光纤与直接光放大相关联发生的自发发射用辅助信号（例如监控信号）进行调制，用于传输辅助信号。在本发明的第一方面中，光放大器的输出通过可变光带通滤波器，其传输特性根据辅助信号而变化，以调制光放大器输出中包含的自发发射分量。在本发明的第二方面中，光放大器的输出由光分支装置分离为主光信号和部分自发发射。分离的自发发射分量通过通过可变光带通滤波器进行调制，该可变光带通滤波器的传输特性根据辅助信号而变化，然后调制的自发发射分量与主光信号进行波分复用。

9. 发明授权

US6061173A Wavelength-division-multiplexing optical amplifier 有权
标题翻译：波分复用光放大器
公开(公告)号：US6061173A
公开(公告)日：2000-05-09
申请号：US207829
申请日：1998-12-07
申请人： Kazuo Yamane , Michikazu Shima , Yumiko Kawasaki , Kenji Tagawa , Shinya Inagaki , Norifumi Shukunami
发明人： Kazuo Yamane , Michikazu Shima , Yumiko Kawasaki , Kenji Tagawa , Shinya Inagaki , Norifumi Shukunami
IPC分类号： H01S3/094 , H01S3/13 , H04B10/17 , H04J14/02 , G02B6/26
CPC分类号： H04B10/296 , H01S3/1301 , H04J14/0221 , H01S2302/00 , H01S2303/00 , H01S3/094096
摘要： An optical amplifier amplifies a wavelength-division-multiplexed optical input signal composed of optical signals having different wavelengths such that the output level of each of the optical signal is always optimized and such that the difference between the gains of the amplifier on the optical signals is minimized when the number of optical signals is two. The output level of the amplifier is controlled according to the number of the optical signals, to optimize the output level of each of the optical signals.
摘要翻译：光放大器放大由具有不同波长的光信号组成的波分复用光输入信号，使得每个光信号的输出电平始终被优化，并且使得放大器在光信号上的增益之间的差为光信号数为2时最小化。根据光信号的数量控制放大器的输出电平，以优化每个光信号的输出电平。

10. 发明授权

US5870217A Multi-wavelength optical batch amplification apparatus 失效
标题翻译：多波长光学批量放大装置
公开(公告)号：US5870217A
公开(公告)日：1999-02-09
申请号：US799936
申请日：1997-02-13
申请人： Hiroyuki Itou , Kazuo Yamane , Michikazu Shima
发明人： Hiroyuki Itou , Kazuo Yamane , Michikazu Shima
IPC分类号： G02B27/10 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/10 , H01S3/17 , H04B10/07 , H04B10/27 , H04B10/29 , H04B10/296 , H04J14/00 , H04J14/02 , H04B10/16
CPC分类号： H04B10/2942 , H04B10/077 , H04B10/07955 , H04B10/2912 , H04B10/296 , H04J14/0221 , H04B2210/258
摘要： The invention provides a multi-wavelength optical batch amplification apparatus wherein, upon batch amplification of a multi-wavelength input optical signal, the powers of optical signals on the input and output sides of an optical amplifier are monitored totally or individually to control the powers of optical signals of the output optical signal of the optical amplifier so that they may be fixed equally. The apparatus includes an entire input light detection section for monitoring the power of the entire input optical signals on the input side of the optical amplifier, an individual output light detection section for monitoring the powers of the output optical signals on the output side of the optical amplifier, an optical amplifier output adjustment section for adjusting the output of the optical amplifier, and a control section for controlling the optical amplifier output adjustment section based on results of detection by the entire input light detection section and the individual output light detection section so that the powers of the output optical signals on the output side of the optical amplifier may be fixed equally.
摘要翻译：本发明提供了一种多波长光学批量放大装置，其中，在多波长输入光信号的批量放大时，光放大器的输入和输出侧的光信号的功率被完全或单独地监测，以控制功率光放大器的输出光信号的光信号，使得它们可以均匀地固定。该装置包括：整个输入光检测部，用于监视光放大器的输入侧的整个输入光信号的功率;个别输出光检测部，用于监视光输出侧的输出侧的输出光信号的功率; 放大器，用于调整光放大器的输出的光放大器输出调整部分，以及用于根据整个输入光检测部分和各输出光检测部分的检测结果控制光放大器输出调节部分的控制部分，光放大器的输出侧的输出光信号的功率可以相等地固定。

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