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21.发明申请Method and apparatus for controlling extinction ratio of light-emitting device 审中-公开控制发光装置消光比的方法和装置公开(公告)号：US20070076771A1
公开(公告)日：2007-04-05
申请号：US11356225
申请日：2006-02-17
IPC分类号： H01S3/00
CPC分类号： H01S5/06804 , H01S5/0617 , H01S5/06812 , H01S5/06832
摘要： An apparatus for controlling an extinction ratio of a light-emitting device, includes: a temperature detecting unit that detects a temperature of the device; a power detecting unit that detects an optical output power of the device; a modulation-current detecting unit that detects a modulation current input into the device; a POW computing unit that computes a power control value for the device based on the temperature; and an ER computing unit that computes an extinction ratio control value for the device based on the power control value, the optical output power, and the modulation current.
摘要翻译： 一种用于控制发光装置的消光比的装置，包括：温度检测单元，其检测装置的温度; 功率检测单元，其检测所述装置的光输出功率; 调制电流检测单元，其检测输入到所述装置的调制电流; POW计算单元，其基于温度计算设备的功率控制值; 以及基于功率控制值，光输出功率和调制电流来计算器件的消光比控制值的ER计算单元。
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公开(公告)号：US07031621B2
公开(公告)日：2006-04-18
申请号：US10998032
申请日：2004-11-29
CPC分类号： H04B10/695 , H04B10/6911
摘要： An optical receiving device which is improved in the accuracy of optical input interruption detection as well as in the alarm response and thus is capable of high-quality detection of interruption of the optical input. A light receiving element receives an optical signal and converts it into an electrical signal. A bias control section stabilizes a bias voltage applied to the light receiving element against variations in temperature and power supply. An optical input interruption protection section protects the light receiving element using a protective voltage so that the light receiving element may not be broken due to an excessive rise of the bias voltage when the optical input is interrupted. An alarm issuing section monitors the photocurrent of the light receiving element and issues an alarm on detecting an interruption of the optical input when the bias voltage and the protective voltage become equal to each other.
摘要翻译： 一种提高光输入中断检测精度和报警响应的光接收装置，能够高质量地检测光输入的中断。 光接收元件接收光信号并将其转换为电信号。 偏置控制部分抵抗温度和电源的变化稳定施加到光接收元件的偏置电压。 光输入中断保护部分使用保护电压保护光接收元件，使得当光输入被中断时由于偏置电压的过度上升而不会损坏光接收元件。 警报发出部分监视光接收元件的光电流，并且当偏置电压和保护电压彼此相等时，检测光输入的中断时发出警报。
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公开(公告)号：US20050100350A1
公开(公告)日：2005-05-12
申请号：US10998032
申请日：2004-11-29
IPC分类号： H04B10/60 , H04B10/07 , H04B10/077 , H04B10/40 , H04B10/50 , H04B10/67 , H04B10/69 , H04B10/06
CPC分类号： H04B10/695 , H04B10/6911
摘要： An optical receiving device which is improved in the accuracy of optical input interruption detection as well as in the alarm response and thus is capable of high-quality detection of interruption of the optical input. A light receiving element receives an optical signal and converts same into an electrical signal. A bias control section stabilizes a bias voltage applied to the light receiving element against variations in temperature and power supply. An optical input interruption protection section protects the light receiving element by means of a protective voltage so that the light receiving element may not be broken due to an excessive rise of the bias voltage when the optical input is interrupted. An alarm issuing section monitors the photocurrent of the light receiving element and issues an alarm on detecting an interruption of the optical input when the bias voltage and the protective voltage become equal to each other.
摘要翻译： 一种提高光输入中断检测精度和报警响应的光接收装置，能够高质量地检测光输入的中断。 光接收元件接收光信号并将其转换为电信号。 偏置控制部分抵抗温度和电源的变化稳定施加到光接收元件的偏置电压。 光输入中断保护部分通过保护电压来保护光接收元件，使得当光输入被中断时由于偏置电压的过度上升而不会损坏光接收元件。 警报发出部分监视光接收元件的光电流，并且当偏置电压和保护电压彼此相等时，检测光输入的中断时发出警报。
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24.发明授权公开(公告)号：US06229833B1
公开(公告)日：2001-05-08
申请号：US09274248
申请日：1999-03-23
申请人： Mitsuharu Noda , Motoyoshi Sekiya , Setsuo Misaizu , Tetsuya Kiyonaga , Nobuaki Sato , Yasunori Nagakubo
发明人： Mitsuharu Noda , Motoyoshi Sekiya , Setsuo Misaizu , Tetsuya Kiyonaga , Nobuaki Sato , Yasunori Nagakubo
IPC分类号： H01S300
CPC分类号： H01S5/06825 , H01S5/042 , H01S5/06804
摘要： Disclosed is a laser diode protecting circuit adapted to prevent a laser diode from producing an excessive emission when the laser diode is driven at low temperature, thereby assuring that the laser diode will not be damaged or degraded in terms of its characteristic. When the laser diode is started at low temperature, a laser diode protecting circuit has a power monitor circuit for monitoring backward power of the laser diode and a laser diode current limiting circuit for limiting the laser diode current when the backward power becomes equal to the set power. When the laser diode temperature subsequently rises and the backward power falls below the set power, an automatic current control circuit performs automatic current control in such a manner that the laser diode current attains a set current value. Alternatively, a temperature monitor circuit monitors the temperature of the laser diode and the laser diode current limiting circuit limits the laser diode current when the monitored temperature of the laser diode is less than the set temperature. When the laser diode temperature exceeds the set temperature, the automatic current control circuit performs automatic current control in such a manner that the laser diode attains the set current value.
摘要翻译： 公开了一种激光二极管保护电路，其适于在激光二极管在低温下被驱动时防止激光二极管产生过多的发射，从而确保激光二极管在其特性方面不会被损坏或劣化。 当激光二极管在低温下启动时，激光二极管保护电路具有用于监视激光二极管反向功率的功率监控电路和激光二极管限流电路，用于在反向功率等于设定值时限制激光二极管电流 功率。 当激光二极管温度随后上升并且反向功率下降到设定功率以下时，自动电流控制电路以激光二极管电流达到设定电流值的方式进行自动电流控制。 或者，温度监视电路监测激光二极管的温度，激光二极管限流电路在激光二极管的监视温度小于设定温度时限制激光二极管电流。 当激光二极管温度超过设定温度时，自动电流控制电路以激光二极管达到设定电流值的方式进行自动电流控制。
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公开(公告)号：US5003626A
公开(公告)日：1991-03-26
申请号：US433431
申请日：1989-11-08
CPC分类号： H04B10/61 , H04B10/614 , H04B10/63 , H04B10/64
摘要： An optical signal receiver comprising an optical mixing/polarization splitting unit for producing IF optical signals having two orthogonally polarized components, an optical signal receiving unit for producing four corresponding IF electric signals, and a combining circuit for combining two IF electric signals having one polarization with the other two IF electric signals having the other polarization, suppressing fluctuation of the polarization and the intensity noise of the related local optical signal. The intensity noise suppression is also effective for IF electric signals having a higher frequency range.
摘要翻译： 一种光信号接收机，包括用于产生具有两个正交极化分量的IF光信号的光混合/偏振分离单元，用于产生四个对应的IF电信号的光信号接收单元，以及组合电路，用于将具有一个极化的两个IF电信号 另外两个具有另一极化的IF电信号抑制偏振波动和相关局部光信号的强度噪声。 强度噪声抑制对于具有较高频率范围的IF电信号也是有效的。
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