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    • 4. 发明授权
    • Optical transmitter, optical receiver, optical transmission system, and optical transmission method
    • 光发射机,光接收机,光传输系统和光传输方式
    • US06728490B1
    • 2004-04-27
    • US09570125
    • 2000-05-12
    • Risato Ohhira
    • Risato Ohhira
    • H04B1012
    • H04B10/541H04B10/5053H04B10/556H04B10/5561H04B10/588
    • An optical transmitter in accordance with the present intention consists of a light source and an interference unit. The interference unit consists of an optical power divider, an intensity modulator, a gain variation device, a phase shifter, an optical coupler, and a phase controller. In the optical transmitter, continuous-wave light emanating from the light source is bifurcated by the optical power divider. One of resultant continuous-wave rays has the intensity thereof modulated based on transmission data by the intensity modulator. The other continuous-wave light has the power thereof adjusted by the gain variation device, and then has the phase thereof shifted by the phase shifter. The optical coupler joins the light signals, whereby the phase of part of the modulated light signal is shifted. The gain variation device is realized with a combination of, for example, an optical amplifier and an optical attenuator. The phase shifter is realized for example, a phase modulator and an optical delay device. A phase controller controls the phase shifter and gain variation device. A light signal emitted from the interference unit is transmitted over a transmission line that is not shown.
    • 根据本意图的光发射机由光源和干涉单元构成。 干扰单元由光功率分配器,强度调制器,增益变化装置,移相器,光耦合器和相位控制器组成。 在光发射机中,从光源发出的连续波光被光功率分配器分叉。 所得到的连续波射线之一,其强度根据强度调制器的透射数据进行调制。 其他连续波光通过增益变化装置调整其功率,然后由相移器移位相位。 光耦合器连接光信号,由此调制光信号的一部分的相位被偏移。 增益变化装置通过例如光放大器和光衰减器的组合来实现。 移相器例如实现了相位调制器和光延迟器件。 相位控制器控制移相器和增益变化装置。 从干扰单元发射的光信号通过未示出的传输线传输。
    • 5. 发明授权
    • Optical amplifier and optical transmission system using same
    • 光放大器和光传输系统使用相同
    • US06724527B2
    • 2004-04-20
    • US09954260
    • 2001-09-18
    • Shinji EndoMotoki Kakui
    • Shinji EndoMotoki Kakui
    • H04B1012
    • H01S3/06758H01S3/06716H01S3/06725H01S3/0677
    • Disclosed are an optical amplifier and an optical transmission system using the same in which not only can the dispersion of optical waveguide paths for optical amplification be easily and sufficiently compensated, but also the waveform degradation of signal light can be restrained. An optical amplifier according to one embodiment of the present invention comprises at least two erbium-doped fibers 10 and 20, having erbium doped to optically amplify signal light with the pump light, and having dispersion different from each other in sign, and being connected together in series, and two pump light sources 11 and 12 for supplying pump light to them.
    • 公开了一种光放大器和使用该放大器的光传输系统,其中不仅可以容易且充分地补偿用于光放大的光波导路径的色散,而且可以抑制信号光的波形劣化。 根据本发明的一个实施例的光放大器包括至少两个铒掺杂光纤10和20,掺铒掺杂以便利用泵浦光光信号放大光信号,并具有彼此不同的色散,并连接在一起 以及用于向其供应泵浦光的两个泵浦光源11和12。
    • 6. 发明授权
    • Optical network equipment with triggered data storage
    • 具有触发数据存储的光网络设备
    • US06707599B1
    • 2004-03-16
    • US09928369
    • 2001-08-14
    • Jun YeYen-Wen LuManman Ren
    • Jun YeYen-Wen LuManman Ren
    • H04B1012
    • H04B10/0731H04B10/296
    • Optical network equipment is provided. The optical network equipment may include optical amplifiers. Control units may be used to control components in the equipment such as gain stage pump lasers. Sensor data may be obtained from sensors in the equipment. The control units may store the sensor data and control data and other information on the operation of the equipment. The stored data may be used in troubleshooting, network maintenance, and set up procedures. Data may be saved when a data storage command is received by the equipment or may be saved when data storage trigger criteria are satisfied. A user may be provided with the ability to customize the trigger criteria and the data storage parameters.
    • 提供光网络设备。 光网络设备可以包括光放大器。 控制单元可用于控制设备中的组件,例如增益级泵浦激光器。 传感器数据可以从设备中的传感器获得。 控制单元可存储传感器数据和控制数据以及关于设备操作的其它信息。 存储的数据可用于故障排除,网络维护和设置过程。 当设备接收到数据存储命令时,可以保存数据,或者当满足数据存储触发条件时可以保存数据。 可以向用户提供定制触发条件和数据存储参数的能力。
    • 10. 发明授权
    • Frequency modulation apparatus
    • 调频装置
    • US06512619B1
    • 2003-01-28
    • US09484265
    • 2000-01-18
    • Masaru Fuse
    • Masaru Fuse
    • H04B1012
    • H04B10/548
    • A first optical modulator converts an electrical signal into an optical-frequency-modulated signal, supplying the same with unmodulated light from a local light source to a first optical receiver. The first optical receiver generates an FM signal, which is a beat signal between the received two lights. This, FM signal is supplied to a filter, where only the carrier component thereof is extracted, and the carrier component is converted in frequency in the frequency converter. With the resultant signal after frequency conversion, a second optical modulator optically modulates the amplitude or intensity of the unmodulated light from the local light source. A second optical receiver receives the resultant signal after optical modulation and an optical signal from the first optical modulator, producing an FM signal, which is a beat signal between the received two optical signals. With such configuration, it is possible to realize high-frequency, wide-band frequency modulation, and also to suppress the phase noise included in the FM signal.
    • 第一光学调制器将电信号转换成光频调制信号,将来自本地光源的未调制光提供给第一光接收器。 第一光接收器产生FM信号,FM信号是接收到的两个光之间的拍频信号。 这个FM信号被提供给滤波器,其中仅提取其载波分量,并且在频率转换器中频率转换载波分量。 利用频率转换后的结果信号,第二光学调制器对来自局部光源的未调制光的振幅或强度进行光学调制。 第二光接收器在光调制之后接收所得到的信号和来自第一光调制器的光信号,产生作为所接收的两个光信号之间的拍频信号的FM信号。 通过这样的结构,可以实现高频,宽带频率调制,并且还可以抑制FM信号中包含的相位噪声。