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41. 发明申请

US20130051790A1 COHERENT OPTICAL RECEIVER, APPARATUS AND METHOD FOR DETECTING INTERCHANNEL SKEW IN COHERENT OPTICAL RECEIVER 有权
标题翻译：相干光接收机，检测相邻光接收机间通道的装置和方法
公开(公告)号：US20130051790A1
公开(公告)日：2013-02-28
申请号：US13696516
申请日：2011-05-13
申请人： Wakako Yasuda , Junichi Abe , Kiyoshi Fukuchi
发明人： Wakako Yasuda , Junichi Abe , Kiyoshi Fukuchi
IPC分类号： H04B10/08 , H04B10/06
CPC分类号： H04B10/616 , H04B10/6151 , H04J14/02 , H04J14/06
摘要： In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an interchannel skew arises, therefore, a coherent optical receiver according to an exemplary aspect of the invention includes a local light source; a 90-degree hybrid circuit; an optoelectronic converter; an analog-to-digital converter; and a digital signal processing unit, wherein the 90-degree hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs a plurality of optical signals separated into a plurality of signal components; the optoelectronic converter detects the optical signals and outputs detected electrical signals; the analog-to-digital converter quantizes the detected electrical signals and outputs quantized signals; and the digital signal processing unit includes a skew compensation unit for compensating a difference in propagation delay between the plurality of signal components, and a demodulation unit for demodulating the quantized signals.
摘要翻译：在相干光接收机中，如果出现通道间偏斜，则不能进行足够的解调，因此接收性能恶化，因此根据本发明的示例性方面的相干光接收机包括本地光源; 90度混合电路; 光电转换器; 一个模拟 - 数字转换器; 以及数字信号处理单元，其中所述90度混合电路使多路复用信号光干扰来自所述本地光源的局部光，并且输出分离成多个信号分量的多个光信号; 光电转换器检测光信号并输出检测到的电信号; 模数转换器对检测到的电信号进行量化并输出量化信号; 并且数字信号处理单元包括用于补偿多个信号分量之间的传播延迟差的偏斜补偿单元和用于解调量化信号的解调单元。

42. 发明授权

US08320779B2 Light receiver, optical communication system and method 有权
标题翻译：光接收机，光通信系统及方法
公开(公告)号：US08320779B2
公开(公告)日：2012-11-27
申请号：US11992398
申请日：2006-10-04
申请人： Kiyoshi Fukuchi , Toshiharu Ito
发明人： Kiyoshi Fukuchi , Toshiharu Ito
IPC分类号： H04B10/06
CPC分类号： H04B10/66
摘要： A receiver includes wavelength demultiplexer for demultiplexing a received WDM light into light signals at respective central frequencies thereof, delay interferometer for converting a light signal output from wavelength demultiplexer into an intensity signal, and light detector for converting an output signal from delay interferometer into an electric signal. The interval between interferential frequencies of delay interferometer is 2/(2n+1) times the interval between the central frequencies of the WDM light. Logic inverting circuit outputs the output signal from the light detector while non-inverting or inverting the logic level thereof depending on the received central frequency.
摘要翻译：接收机包括用于将接收到的WDM光分解为其各自中心频率的光信号的波长解复用器，用于将从波长解复用器输出的光信号转换为强度信号的延迟干涉仪，以及用于将来自延迟干涉仪的输出信号转换为电信号。延迟干涉仪干涉频率之间的间隔是WDM光中心频率间隔的2 /（2n + 1）倍。逻辑反相电路根据接收到的中心频率，在反相或反相逻辑电平的同时，输出来自光检测器的输出信号。

43. 发明申请

US20120237202A1 COHERENT OPTICAL RECEIVER, APPARATUS AND METHOD FOR DETECTING INTER-CHANNEL SKEW IN COHERENT OPTICAL RECEIVER 有权
标题翻译：相关的光接收机，检测相干光接收机中的通道间的方法
公开(公告)号：US20120237202A1
公开(公告)日：2012-09-20
申请号：US13505199
申请日：2011-09-02
申请人： Junichi Abe , Wakako Yasuda , Kiyoshi Fukuchi
发明人： Junichi Abe , Wakako Yasuda , Kiyoshi Fukuchi
IPC分类号： H04B10/08
CPC分类号： H04B10/616 , H04B10/0775 , H04B10/6164 , H04B10/6165
摘要： In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an inter-channel skew arises, therefore, a coherent optical receiver according to an exemplary aspect of the invention includes a local light source, a 90° hybrid circuit, an optoelectronic converter, an analog to digital converter, and a digital signal processing unit; wherein the 90° hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs a plurality of optical signals separated into a plurality of signal components; the optoelectronic converter detects the optical signals and outputs detected electrical signals; the analog to digital converter quantizes the detected electrical signals and outputs quantized signals; the digital signal processing unit includes a skew compensation unit for compensating a difference in propagation delay between the plurality of signal components, and an FFT operation unit for performing a fast Fourier transform process on the quantized signals; and wherein the difference in propagation delay is calculated on the basis of a plurality of peak values with a central focus on one peak value in the results of performing the fast Fourier transform process.
摘要翻译：在相干光接收机中，如果发生信道间偏斜，则不可能进行足够的解调，因此接收性能恶化，因此，根据本发明的示例性方面的相干光接收机包括本地光源，90°混合电路，光电转换器，模数转换器和数字信号处理单元; 其中所述90°混合电路使多路复用信号光干扰来自所述本地光源的局部光，并且输出分离成多个信号分量的多个光信号; 光电转换器检测光信号并输出检测到的电信号; 模数转换器对检测到的电信号进行量化并输出量化信号; 数字信号处理单元包括用于补偿多个信号分量之间的传播延迟差的偏斜补偿单元和用于对量化信号执行快速傅里叶变换处理的FFT运算单元; 并且其中基于执行快速傅里叶变换处理的结果中的中心聚焦于一个峰值的多个峰值来计算传播延迟的差异。

44. 发明授权

US08165477B2 Light receiving apparatus using DQPSK demodulation method, and DQPSK demodulation method 有权
标题翻译：采用DQPSK解调方式的光接收装置，以及DQPSK解调方式
公开(公告)号：US08165477B2
公开(公告)日：2012-04-24
申请号：US11951856
申请日：2007-12-06
申请人： Satomi Shioiri , Kiyoshi Fukuchi , Toshiharu Ito , Hitoshi Takeshita
发明人： Satomi Shioiri , Kiyoshi Fukuchi , Toshiharu Ito , Hitoshi Takeshita
IPC分类号： H04B10/06 , H04B10/00 , H04B10/12 , H04J14/00
CPC分类号： H04B10/677
摘要： The present invention provides a light receiving apparatus using the DQPSK demodulation method. The light receiving apparatus comprises: one Mach-Zehnder interferometer for branching a received light signal into light signals at two arms to allow the branched two light signals to interfere with each other; one balanced photoelectric converter for converting the two interfered light signals, by using the Mach-Zehnder interferometer, into an electric signal corresponding to a difference between light intensities of the two light signals; and a phase adjuster for dynamically shifting the phase of a light signal passed through one of the two arms at the Mach-Zehnder interferometer.
摘要翻译：本发明提供一种使用DQPSK解调方法的光接收装置。光接收装置包括：一个马赫 - 曾德干涉仪，用于将接收到的光信号分成两个臂的光信号，以允许分支的两个光信号相互干扰; 一个平衡光电转换器，用于通过使用马赫 - 策德尔干涉仪将两个干涉光信号转换成对应于两个光信号的光强度差的电信号; 以及相位调整器，用于在Mach-Zehnder干涉仪上动态地移动通过两个臂中的一个的光信号的相位。

45. 发明授权

US08085634B2 Optical disk drive, and method for determining recording strategy 失效
标题翻译：光盘驱动器及确定记录策略的方法
公开(公告)号：US08085634B2
公开(公告)日：2011-12-27
申请号：US11775171
申请日：2007-07-09
申请人： Kiyoshi Fukuchi
发明人： Kiyoshi Fukuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/0062 , G11B7/1267
摘要： An optical disk drive for recording data in accordance with a recording strategy determines a recording strategy of an unknown optical disk through comparatively-simple processing. When a loaded optical disk is an unknown disk, a control section reads a recommended recording strategy from a predetermined area on the loaded optical disk and reads correction parameters corresponding to the loaded optical disk from memory. The control section makes a correction to the read, recommended recording strategy in accordance with the correction parameters, and converts a recording pattern into a recording pulse in accordance with the corrected, recommended recording strategy. After conversion of the recording pattern into the recording pulse, the control section performs OPC and subsequently commences recording of actual data.
摘要翻译：用于根据记录策略记录数据的光盘驱动器通过相对简单的处理来确定未知光盘的记录策略。当装载的光盘是未知盘时，控制部分从加载的光盘上的预定区域读取推荐的记录策略，并从存储器读取对应于加载的光盘的校正参数。控制部根据校正参数对读取推荐的记录策略进行校正，并且根据校正的推荐记录策略将记录图案转换成记录脉冲。在将记录图案转换成记录脉冲之后，控制部分执行OPC并随后开始记录实际数据。

46. 发明申请

US20100046965A1 OPTICAL RECEPTION DEVICE AND OPTICAL RECEPTION METHOD 有权
标题翻译：光接收装置和光接收方法
公开(公告)号：US20100046965A1
公开(公告)日：2010-02-25
申请号：US12518348
申请日：2007-11-29
申请人： Satomi Shioiri , Kiyoshi Fukuchi
发明人： Satomi Shioiri , Kiyoshi Fukuchi
IPC分类号： H04B10/06
CPC分类号： H04B10/69 , H04B10/677 , H04L27/223
摘要： The present invention converts each of the optical differential signals from DPSK demodulator from an optical signal into an electrical signal by using optical-electrical signal converters. Thereafter, each electrical signal is subjected to amplification adjustment at an appropriate amplification factor by variable amplifier, and an appropriate delay amount is added to each electrical signal by variable delay line, and thereafter data discrimination is performed by discriminator. Since two differential signals after DPSK demodulation are subjected to amplitude and delay adjustments, the need for optical parts is obviated enabling the use of electric circuits which can be integrated. Thus, the cost of the optical reception device will be reduced. Moreover, the since electric signals whose phases and amplitudes are equalized are inputted to discriminator, erroneous determination of data at discriminator will be reduced.
摘要翻译：本发明通过使用光电信号转换器将来自DPSK解调器的每个光差分信号从光信号转换成电信号。此后，通过可变放大器以适当的放大系数对每个电信号进行放大调整，并通过可变延迟线将适当的延迟量加到每个电信号上，然后通过鉴别器进行数据鉴别。由于在DPSK解调之后的两个差分信号进行振幅和延迟调整，因此无需使用可以集成的电路。因此，光接收装置的成本将降低。此外，由于相位和幅度均衡的电信号被输入到鉴别器，因此鉴别器上的数据的错误确定将被减少。

47. 发明申请

US20080008074A1 OPTICAL DISK DRIVE, AND METHOD FOR DETERMINING RECORDING STRATEGY 失效
标题翻译：光盘驱动器和确定记录策略的方法
公开(公告)号：US20080008074A1
公开(公告)日：2008-01-10
申请号：US11775171
申请日：2007-07-09
申请人： Kiyoshi Fukuchi
发明人： Kiyoshi Fukuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/0062 , G11B7/1267
摘要： An optical disk drive for recording data in accordance with a recording strategy determines a recording strategy of an unknown optical disk through comparatively-simple processing. When a loaded optical disk is an unknown disk, a control section reads a recommended recording strategy from a predetermined area on the loaded optical disk and reads correction parameters corresponding to the loaded optical disk from memory. The control section makes a correction to the read, recommended recording strategy in accordance with the correction parameters, and converts a recording pattern into a recording pulse in accordance with the corrected, recommended recording strategy. After conversion of the recording pattern into the recording pulse, the control section performs OPC and subsequently commences recording of actual data.
摘要翻译：用于根据记录策略记录数据的光盘驱动器通过相对简单的处理来确定未知光盘的记录策略。当装载的光盘是未知盘时，控制部分从加载的光盘上的预定区域读取推荐的记录策略，并从存储器读取对应于加载的光盘的校正参数。控制部根据校正参数对读取推荐的记录策略进行校正，并且根据校正的推荐记录策略将记录图案转换成记录脉冲。在将记录图案转换成记录脉冲之后，控制部分执行OPC并随后开始记录实际数据。

48. 发明授权

US07050374B2 Optical disk apparatus 有权
公开(公告)号：US07050374B2
公开(公告)日：2006-05-23
申请号：US10228620
申请日：2002-08-26
申请人： Kiyoshi Fukuchi , Mitsumasa Kubo
发明人： Kiyoshi Fukuchi , Mitsumasa Kubo
IPC分类号： G11B5/09
CPC分类号： G11B7/126
摘要： An optical disk apparatus for recording test data onto an optical disk while changing the level of recording power and determines the optimum recording power with reference to the quality of a reproduced signal of the test data. A modulation degree or a γ value is calculated from a reproduced signal of the test data, and the gradient of a change of the modulation degree or the γ value relative to the recording power Pw is calculated. Further, a target recording power is determined utilizing an area where the gradient of the change is relatively sharp, and the optimum recording power is determined based on the target recording power.

49. 发明授权

US07043112B2 Optical wavelength-multiplexing technique 有权
公开(公告)号：US07043112B2
公开(公告)日：2006-05-09
申请号：US09991689
申请日：2001-11-26
申请人： Kiyoshi Fukuchi
发明人： Kiyoshi Fukuchi
IPC分类号： G02B6/293
CPC分类号： H04J14/0279 , H04B10/2503 , H04B10/2918 , H04B10/2972 , H04J14/02
摘要： An optical wavelength-multiplexing system allowing long distance transmission with reducing effects of noise and fiber nonlinealities is disclosed. First wavelength-multiplexing light and second wavelength-multiplexing light within a wavelength bandwidth of 100 nm or more are propagated in opposite directions through the same optical fiber. The wavelength band of the first wavelength-multiplexing light is set to a shorter wavelength side as compared to that of the second wavelength-multiplexing light. In addition, excitation light having a wavelength shorter than the wavelength band of the first wavelength-multiplexing light is propagated through the optical fiber in the same direction as the second wavelength-multiplexing light. The excitation light is shorter in wavelength than the first wavelength-multiplexing light by an amount determined depending on Raman scattering characteristic of the optical fiber.

50. 发明授权

US06687207B2 Optical recording apparatus for recording information on a write-once disk or an erasable optical disk 失效
标题翻译：用于在一次写入盘或可擦除光盘上记录信息的光学记录装置
公开(公告)号：US06687207B2
公开(公告)日：2004-02-03
申请号：US09883670
申请日：2001-06-18
申请人： Kiyoshi Fukuchi , Yoshiyuki Otsuka , Mitsumasa Kubo
发明人： Kiyoshi Fukuchi , Yoshiyuki Otsuka , Mitsumasa Kubo
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/007 , G11B7/26
摘要： An optical disk recording apparatus for recording information onto a write-once or erasable optical disk has a memory component including a table of prerecorded correction curves consisting of recording power correction values corresponding to radial positions for each type of a variety of different optical disks, a correction component for correcting the recording power in an optimum power control operation (OPC) operation using the appropriate correction value, and a recording component for recording information onto the optical disk using the corrected recording power.
摘要翻译：用于将信息记录在一次写入或可擦除光盘上的光盘记录装置具有存储部件，该存储部件包括预先记录的校正曲线表，该校正曲线由对应于各种不同光盘的径向位置的记录功率校正值组成，用于使用适当的校正值在最佳功率控制操作（OPC）操作中校正记录功率的校正组件，以及用于使用校正的记录功率将信息记录到光盘上的记录组件。

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