公开(公告)号：US08345721B2

公开(公告)日：2013-01-01

申请号：US12817251

申请日：2010-06-17

申请人： Moriyasu Ichino ,  Hiroto Ishibashi ,  Toru Ukai ,  Yuanzhe Li

发明人： Moriyasu Ichino ,  Hiroto Ishibashi ,  Toru Ukai ,  Yuanzhe Li

IPC分类号： H01S3/00

CPC分类号： H01S5/06832 ,  H01S5/06804

摘要： A method to control an LD (laser diode) is disclosed. The method compares the operating temperature of the LD with a transition temperature. When the former temperature exceeds the latter, the modulation current is set based on the bias current, which is independently determined by the APC loop. On the other hand, the operating temperature is less than the transition temperature; the modulation current is determined by the operating temperature.

摘要翻译： 公开了一种控制LD（激光二极管）的方法。 该方法将LD的工作温度与转变温度进行比较。 当前一种温度超过后者时，调制电流基于由APC回路独立确定的偏置电流来设定。 另一方面，工作温度小于转变温度; 调制电流由工作温度决定。

公开(公告)号：US20100322271A1

公开(公告)日：2010-12-23

申请号：US12817251

申请日：2010-06-17

申请人： Moriyasu ICHINO ,  Hiroto Ishibashi ,  Toru Ukai ,  Yuanzhe Li

发明人： Moriyasu ICHINO ,  Hiroto Ishibashi ,  Toru Ukai ,  Yuanzhe Li

IPC分类号： H01S3/10

CPC分类号： H01S5/06832 ,  H01S5/06804

摘要： A method to control an LD (laser diode) is disclosed. The method compares the operating temperature of the LD with a transition temperature. When the former temperature exceeds the latter, the modulation current is set based on the bias current, which is independently determined by the APC loop. On the other hand, the operating temperature is less than the transition temperature; the modulation current is determined by the operating temperature.

摘要翻译： 公开了一种控制LD（激光二极管）的方法。 该方法将LD的工作温度与转变温度进行比较。 当前一种温度超过后者时，调制电流基于由APC回路独立确定的偏置电流来设定。 另一方面，工作温度小于转变温度; 调制电流由工作温度决定。

公开(公告)号：US08244967B2

公开(公告)日：2012-08-14

申请号：US12705377

申请日：2010-02-12

申请人： Hiroto Ishibashi

发明人： Hiroto Ishibashi

IPC分类号： G06F12/00 ,  G06F12/02

CPC分类号： G06F12/0246 ,  G06F2212/7206 ,  G11C16/10

摘要： An effective algorithm for the CPU with a flash memory is disclosed to shorten a dead time to erase the flash memory and to write new data therein. The flash memory of the invention provides front and back blocks for the user data area. When the front block is filled, the back block is erased just after the front block is fully filled in advance to receive a new data next to be written.

摘要翻译： 公开了一种用于具有闪速存储器的CPU的有效算法，以缩短停止时间以擦除闪存并在其中写入新数据。 本发明的闪速存储器为用户数据区域提供前和后块。 当前面的程序段被填充时，前面的程序块完全填满之后，后面的程序段被擦除，以便接收一个新的数据。

公开(公告)号：US20090135868A1

公开(公告)日：2009-05-28

申请号：US12289345

申请日：2008-10-24

申请人： Hiroto Ishibashi

发明人： Hiroto Ishibashi

IPC分类号： H01S5/02

CPC分类号： H01S5/06832 ,  H01S5/06804

摘要： An optical transmitter is disclosed that provides a function to resume the APC operation automatically when the failure of the APC operation is due to the thermal runaway of the device in the APC loop. The controller included in the transmitter always monitors the bias current supplied to the LD, and the optical output from the LD. When the bias current exceeds a threshold, the controller decides whether the abnormal is due to the temporary thermal runaway or the fatal failure of the device within the APC loop, and begins to sense the ambient temperature of the LD for appropriate resuming after the thermal runaway is cleared.

摘要翻译： 公开了一种光传输器，其提供当APC操作的故障是由于APC环路中的设备的热失控而自动恢复APC操作的功能。 变送器中包含的控制器始终监控提供给LD的偏置电流和LD的光输出。 当偏置电流超过阈值时，控制器判断异常是由于临时热失控还是APC环路内设备的致命故障，并且开始感测LD的环境温度，以便在热失控后进行适当的恢复 被清除

公开(公告)号：US07783204B2

公开(公告)日：2010-08-24

申请号：US11892562

申请日：2007-08-23

申请人： Hiroto Ishibashi

发明人： Hiroto Ishibashi

IPC分类号： H04B10/04

CPC分类号： H04B10/504 ,  H01S5/0683

摘要： The present invention discloses an optical transmitter that provides a function to vary the rate of the increase of the bias and modulation currents and their practical values during the APC feedback loop is left unstable without prolonging this unstable period. The optical transmitter of the invention includes a controller configured to read initial parameters from the memory, to increase the bias and modulation currents in stepwise based on thus read initial parameters, and to begin the automatic feedback control to keep the optical output from the laser diode constant after the bias and modulation currents reach their temporarily target values.

摘要翻译： 本发明公开了一种提供改变偏差和调制电流增加速率的功能的光发射机，其APC反馈环路中的实际值保持不稳定，而不延长该不稳定周期。 本发明的光发射机包括：控制器，被配置为从存储器读取初始参数，基于这样读取的初始参数逐步增加偏置和调制电流，并开始自动反馈控制以保持来自激光二极管的光输出 偏置和调制电流达到其临时目标值后恒定。

公开(公告)号：US07443897B2

公开(公告)日：2008-10-28

申请号：US11806848

申请日：2007-06-04

申请人： Hiroto Ishibashi

发明人： Hiroto Ishibashi

IPC分类号： H01S3/13 ,  H01S3/00

CPC分类号： H04B10/564 ,  H01S5/06825

摘要： The present invention provides an optical transmitter that enables to distinguish failure modes of the auto-power control (APC) of the laser diode (LD). The transmitter provides the APC circuit comprised of the driver for supplying the driving current, the LD, the PD for monitoring a portion of the output light from the LD, and the control unit for setting the driving current. The control unit monitors, at regular intervals, the bias current to the LD and the time differential of the bias current. The control unit only stops the APC circuit when both the bias current and the time differential of the bias current exceed respective references.

摘要翻译： 本发明提供一种能够区分激光二极管（LD）的自动功率控制（APC）的故障模式的光发射机。 发射机提供由用于提供驱动电流的驱动器组成的APC电路，LD，用于监视来自LD的输出光的一部分的PD，以及用于设置驱动电流的控制单元。 控制单元定期监视到LD的偏置电流和偏置电流的时间差。 当偏置电流和偏置电流的时间差超过相应参考值时，控制单元仅停止APC电路。

公开(公告)号：US20080131139A1

公开(公告)日：2008-06-05

申请号：US11978711

申请日：2007-10-30

申请人： Hiroto Ishibashi

发明人： Hiroto Ishibashi

IPC分类号： H04B10/00

CPC分类号： H04B10/278 ,  H04B10/40

摘要： The preset invention provides an optical data link that prevents the internal I2C bus system from being hung up. The data link provides a CPU able to receive a reset signal and an IC (PHY) to control the physical layer to communicate with the outside of the data link, and they are coupled via the internal I2C bus system. When the data link receives a reset signal, the PHY behaves as the slave device, while, the controller behaves as the master device to output dummy clocks on the clock line of the I2C bus so as to sweep left data on the data line of the I2C bus.

摘要翻译： 本发明提供了防止内部I2C总线系统挂起的光学数据链路。 数据链路提供能够接收复位信号的CPU和IC（PHY），以控制物理层与数据链路的外部通信，并且它们通过内部I2C总线系统耦合。 当数据链路接收到复位信号时，PHY作为从器件工作，而控制器作为主器件，在I2C总线的时钟线上输出虚拟时钟，以扫描数据线的数据线上的左侧数据 I2C总线。

公开(公告)号：US08112004B2

公开(公告)日：2012-02-07

申请号：US12261676

申请日：2008-10-30

申请人： Hiroto Ishibashi

发明人： Hiroto Ishibashi

IPC分类号： H04B10/06

CPC分类号： H04B10/2513 ,  H04B10/697

摘要： An optical receiver implemented with two electronic dispersion compensators (EDC) is disclosed. The optical receiver selects one of the EDC in an ordinary operation. Once there shaped signal compensated by the selected EDC is degraded due to irregular conditions of the optical transmission line, the optical transmitter and so on, the optical receiver reconfigures the tap coefficients of the unselected EDC and switches to the newly configured EDC after setting the tap coefficients for the new condition of the transmission line and the transmitter.

摘要翻译： 公开了一种用两个电子色散补偿器（EDC）实现的光接收机。 光接收机在普通操作中选择一个EDC。 一旦被选择的EDC补偿的整形信号由于光传输线，光发射机等的不规则状况而被降级，光接收机重新配置未选择的EDC的抽头系数，并且在设置了抽头之后切换到新配置的EDC 传输线和发射机新条件的系数。

公开(公告)号：US07609732B2

公开(公告)日：2009-10-27

申请号：US11905179

申请日：2007-09-27

申请人： Hiroto Ishibashi

发明人： Hiroto Ishibashi

IPC分类号： H01S3/04

CPC分类号： H01S5/02415

摘要： The present invention is to provide a control algorithm of a thermo-electric cooler (TEC) for a laser diode (LD) where a rush current accompanied with the stepwise change of the target temperature of the TEC. First, the controller stops the TEC driver prior to the setting of the target temperature, and sets the present temperature of the LD. Subsequently, the controller gradually increases the reference temperature of the TEC in stepwise to the target temperature. Thus, the controller suppresses the rush current accompanied with the instantaneous increase of the reference temperature of the TEC.

摘要翻译： 本发明提供一种用于激光二极管（LD）的热电冷却器（TEC）的控制算法，其中伴随着TEC的目标温度的逐步改变的冲击电流。 首先，控制器在设定目标温度之前停止TEC驱动，并设定LD的当前温度。 随后，控制器逐步将TEC的参考温度逐步增加到目标温度。 因此，控制器抑制伴随着TEC的基准温度的瞬时增加的冲击电流。

公开(公告)号：US20070160095A1

公开(公告)日：2007-07-12

申请号：US11439424

申请日：2006-05-24

申请人： Kentaro Kitagawa ,  Hiroto Ishibashi

发明人： Kentaro Kitagawa ,  Hiroto Ishibashi

IPC分类号： H01S3/13

CPC分类号： H01S5/0683 ,  H01S5/0617 ,  H01S5/06804

摘要： This invention provides an automatic power control (APC) circuit for keeping an extinction ratio constant even when the efficiency of a laser diode (LD) deteriorates. The APC circuit according to this invention stores first control data for deciding the relationship between a bias current Ib and a modulation current Im so that the extinction ratio under a certain target power is a predetermined value. A central processing unit (CPU) decides the bias current Ib and modulation current Im on the basis of a current optical output power and the first control data and supplies them to an LD driver. The APC circuit also stores second control data for deciding the correction value for the optical output power corresponding to the temperature of the LD. The CPU acquires the current temperature before deciding the bias current Ib, decides a correction value corresponding to the current temperature according to the second control data, and corrects the target power. Thereafter, the CPU computes the bias current Ib on the basis of the corrected target power.

摘要翻译： 本发明提供一种自动功率控制（APC）电路，用于在激光二极管（LD）的效率降低时保持消光比恒定。 根据本发明的APC电路存储用于确定偏置电流Ib和调制电流Im之间的关系的第一控制数据，使得在某一目标功率下的消光比是预定值。 中央处理单元（CPU）基于当前光输出功率和第一控制数据来确定偏置电流Ib和调制电流Im，并将其提供给LD驱动器。 APC电路还存储用于决定与LD的温度对应的光输出功率的校正值的第二控制数据。 在决定偏置电流Ib之前，CPU获取当前温度，根据第二控制数据确定与当前温度对应的校正值，并校正目标功率。 此后，CPU基于校正的目标功率来计算偏置电流Ib。