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1. 发明公开

CN101911401A 减小光学信号光斑的方法和设备无效
公开(公告)号：CN101911401A
公开(公告)日：2010-12-08
申请号：CN200880124014.7
申请日：2008-12-24
申请人：曼德斯必德技术公司
发明人： C·巴扎尼 , D·德雷珀 , K·B·麦克唐纳
IPC分类号： H01S3/02 , H01S3/00
CPC分类号： H01S5/06209 , G02B27/48 , H01S5/042 , H01S5/06216 , H01S5/06246 , H01S5/0652 , H04N9/3129 , H04N9/3161
摘要：一种光信号发生器，配置为具有相关的控制系统和配置为减小光斑的驱动器。通过脉动第一电流电平和第二电流电平之间的驱动信号减小光斑。这些脉冲使得光信号发生器向光信号中引入振荡。在光信号的振荡周期内减小所发射光的相干性，这减少了光斑。在一个实施例中，脉动驱动信号将驱动信号降低至阈值附近或者阈值下，这间歇地关闭光信号输出。将光信号恢复至期望的光输出强度引入减小光斑的振荡。脉冲频率和负载循环由负载循环控制信号控制以调节总体光功率和去斑量。

2. 发明专利

JPS59174069A Laser diode control circuit 失效
标题翻译：激光二极管控制电路
公开(公告)号：JPS59174069A
公开(公告)日：1984-10-02
申请号：JP3450984
申请日：1984-02-27
申请人： Minnesota Mining & Mfg
发明人： DEBITSUDO YAKOBU SUKUUN
IPC分类号： H04N1/113 , G06K15/12 , H01S5/062 , H01S5/068 , H01S5/0683
CPC分类号： H01S5/06209 , G06K15/1209 , G06K15/1214 , H01S5/0683
摘要： Circuitry for control of the level of light output from a laser diode that is adapted to direct its light output to a resonant scanning mirror including a biasing current circuit portion for providing a current level for the laser diode at a desired set point and a circuit portion connected to the laser diode which reduces the current through the laser diode by an amount that is inversely proportional to the velocity of the scanning mirror so the amount of light energy received from the scanning mirror at any portion of a scan surface covered by the scanning mirror will be the same when the laser diode is on. Another circuit portion is also connected directly to the laser diode to selectively reduce the current through the laser diode to a level that is below the laser diode threshold current in accordance with binary signals supplied to such circuit portion.

3. 发明申请

WO03016816A3 CURRENT SENSOR 审中-公开
标题翻译：电流传感器
公开(公告)号：WO03016816A3
公开(公告)日：2003-07-31
申请号：PCT/US0226068
申请日：2002-08-15
申请人： KVH IND INC
发明人： DYOTT RICHARD B
IPC分类号： G01R15/24 , G02B6/10 , H01S5/06 , H01S5/062 , H01S5/065 , G01B9/02
CPC分类号： G02B6/105 , G01R15/246 , H01S5/0607 , H01S5/06209 , H01S5/06233 , H01S5/065 , H01S5/0652
摘要： A method and device for measuring the current in a conductor (38) are presented. They utilize the Faraday effect on counter-propagating circularly polarized beams of flight in a fiber optic coil (37). The light beams are transformed to and from circular polarization by a polarization transformer (40) comprised of a birefringent fiber with a twist through an appropriate angle at an appropriate distance from one end.
摘要翻译：提出了一种用于测量导体（38）中的电流的方法和装置。他们利用光纤线圈（37）中反向传播的圆偏振光束的法拉第效应。光束由双折射光纤组成的偏振变换器（40）转换为圆偏振并由圆偏振转换为偏振变换器（40），该偏振变换器（40）以适当的角度在距离一端适当的距离处扭转。

4. 发明申请

WO00048008A1 POLARIZATION TRANSFORMER AND CURRENT SENSOR USING THE SAME 审中-公开
标题翻译：偏振变压器和使用相同的电流传感器
公开(公告)号：WO00048008A1
公开(公告)日：2000-08-17
申请号：PCT/US2000/003469
申请日：2000-02-10
IPC分类号： G01R15/24 , G02B6/024 , G02B6/10 , G02B27/28 , H01S5/06 , H01S5/062 , H01S5/065 , G02B6/27
CPC分类号： G02B6/105 , H01S5/0607 , H01S5/06209 , H01S5/06233 , H01S5/065 , H01S5/0652
摘要： A method for fabricating a transformer of linearly polarized light to elliptically polarized light is disclosed. The method involves twisting a birefringent fiber through angles that depend on the desired final polarization. This technique obviates the need to splice fibers, as in common practice. The polarization can be fine-tuned by heating the fiber to cause the core and the cladding of the fiber to interdiffuse. Also disclosed is a current sensor using the transformer of polarized light which is based on the Faraday Effect in a Sagnac interferometer.
摘要翻译：公开了一种用于制造线偏振光变换成椭圆偏振光的方法。该方法涉及通过取决于期望的最终极化的角度来扭转双折射光纤。这种技术避免了像通常的做法一样拼接纤维的需要。可以通过加热纤维来微调极化，使纤维的纤芯和包层相互扩散。还公开了使用基于Sagnac干涉仪中的法拉第效应的偏振光变压器的电流传感器。

5. 发明申请

WO2007055691A1 APPARATUS FOR DYNAMIC CONTROL OF LASER BEAM PROFILE 审中-公开
标题翻译：激光光束动态动态控制装置
公开(公告)号：WO2007055691A1
公开(公告)日：2007-05-18
申请号：PCT/US2005/040750
申请日：2005-11-10
申请人： QUINTESSENCE PHOTONICS CORPORATION
发明人： LIPSON, Jan
IPC分类号： B23K26/00 , B23K26/20 , B23K26/38
CPC分类号： B23K26/0604 , B23K26/0006 , B23K26/0066 , B23K26/0613 , B23K26/0676 , B23K26/0732 , B23K26/244 , B23K26/364 , B23K26/38 , B23K2201/34 , B23K2203/04 , B23K2203/05 , B23K2203/50 , H01S5/06209 , H01S5/4025
摘要： A laser system that can be used to perform manufacturing process such as welding, cutting, drilling and marking a work piece. The laser system includes an array of laser diodes (12) that each generate a laser beam. The laser beams (16) may collectively create a beam that is directed onto the work piece (20). The system also includes a control circuit (28) that can select and control the laser diodes to vary a characteristic(s) and/or profile of the beam. The control circuit may control the laser diodes so that an outer area of the beam has a higher intensity than an inner area of the beam.
摘要翻译：可用于执行焊接，切割，钻孔和标记工件等制造工艺的激光系统。激光系统包括激光二极管阵列（12），每个激光二极管产生激光束。激光束（16）可以共同地产生被引导到工件（20）上的光束。该系统还包括可以选择和控制激光二极管以改变光束的特性和/或轮廓的控制电路（28）。控制电路可以控制激光二极管，使得光束的外部区域具有比光束的内部区域更高的强度。

6. 发明申请

WO1992005608A1 SEMICONDUCTOR LASER DIODE CONTROLLER AND LASER DIODE BIASING CONTROL METHOD 审中-公开
标题翻译：半导体激光二极管控制器和激光二极管偏置控制方法
公开(公告)号：WO1992005608A1
公开(公告)日：1992-04-02
申请号：PCT/US1991005302
申请日：1991-07-31
申请人： FINISAR CORPORATION
发明人： FINISAR CORPORATION , LEVINSON, Frank, H.
IPC分类号： H01S03/10
CPC分类号： H05B33/0851 , H01S5/0014 , H01S5/0617 , H01S5/06209 , H01S5/06812 , H01S5/06825 , H01S5/0683 , H05B33/0854 , H05B37/03
摘要： A laser diode controller (102) uses a programmed microcontroller (162) to accurately control the process of turning on and selecting the operating point of the laser diode (100). The laser diode (100) has a front facet (110) for transmitting light, and a back facet (114) for monitoring the laser diode's optical output power. Once the back facet (114) of the laser diode (100) is calibrated, the controller can accurately monitor the laser diode's operating characteristics, and can select the best operating point current based on the current operating characteristics of the laser diode (100). During calibration of the laser diode (100), the controller (102) can check the linearity of the laser diode's optical output power as a function of drive current, and can thereby detect defects in the laser diode (100). In a full duplex optical link, the controller (102) of the present invention prevents the laser diodes from generating light at their full normal intensity until the integrity of the link has been established, thereby preventing light from the laser diode's from accidentally damaging user's eyes. Furthermore, the controller (102) can use the full duplex link to establish lower operating point drive currents that would otherwise be used, thereby significantly lengthening the lifetime of the laser diodes (100). A laser diode's operating characteristics change over time in such a way as to enable the controller (102) to predict when the laser will fail. The controller (102) records the operating characteristics of the laser diode (100) in a nonvolatile memory, analyzes changes in those characteristics, and generates a failure warning message when those changes match predefined failure prediction criteria.

7. 发明申请

WO1989006450A1 APPARATUS AND METHOD FOR CONTROLLING A LASER DIODE TO GENERATE A LINEAR ILLUMINATIVE OUTPUT 审中-公开
标题翻译：用于控制激光二极管以生成线性照明输出的装置和方法
公开(公告)号：WO1989006450A1
公开(公告)日：1989-07-13
申请号：PCT/US1988004615
申请日：1988-12-27
申请人： EASTMAN KODAK COMPANY
发明人： EASTMAN KODAK COMPANY , DAVIS, James, Glenn , HARDY, James, Alan
IPC分类号： H01S03/10
CPC分类号： H01S5/06209 , H01S5/06216 , H01S5/06832 , H01S5/06835
摘要： A controller for a laser diode causes the diode to generate an illuminative output which varies linearly in response to changes in image signals which range between minimum and maximum brightness levels. A switchover point between first and second modes of operation is selected to be above the knee region of the laser diode operating curve. If the input signal values are above the switchover point, diode illuminative ouptut is a function of these signal values. However, if the input signal values are below the switchover point, then the input signals are modulated to switch the diode several times between an ''on'' state which is above the knee region and an ''off'' state, to form one picture element (pixel). In order to vary the illuminative output as a linear function of the change in image signal level, the diode ''on'' time during formation of one pixel is a function of the image signal value.

8. 发明申请

WO03041230A3 TOGGLING OPTOELECTRONIC DEVICE AND METHOD 审中-公开
标题翻译：光栅光电器件及方法
公开(公告)号：WO03041230A3
公开(公告)日：2003-07-31
申请号：PCT/US0236103
申请日：2002-11-08
申请人： UNIV YALE , KOUDELKA ROBERT D , HARMON ERIC S , SALZMAN DAVID B , BOONE THOMAS S , WOODALL JERRY M
发明人： KOUDELKA ROBERT D , HARMON ERIC S , SALZMAN DAVID B , BOONE THOMAS S , WOODALL JERRY M
IPC分类号： H01L33/02 , H01S5/04 , H01S5/06 , H01S5/062 , H01L33/00 , H01S5/00
CPC分类号： H01S5/06209 , H01L33/02 , H01S5/041 , H01S5/0607
摘要： A new optoelectronic device structure is described, whose frequency response is not fundamentally constrained by the recombination time constant for non-equilibrium excess carriers which has limited prior art optoelectronic devices. The device operates by spatially relocating excess carriers (261A, 261B) between two or more regions (205, 207) with different optical emission properties, thereby changing the operating state indicated by the device, e.g., On or Off. Physical mechanisms causing the spatial relocation of carriers, such as drift and diffusion, can be substantially faster than the recombination time constant that governs the performance of prior art devices. Devices in accordance with the invention are more efficient and versatile at high modulation frequencies than devices implemented using the prior art.
摘要翻译：描述了一种新的光电器件结构，其频率响应不受限于现有技术的光电子器件的非平衡过量载流子的复合时间常数的约束。该装置通过在具有不同的光发射特性的两个或更多个区域（205,207）之间通过空间重新定位多余的载体（261A，261B）来工作，由此改变由装置指示的操作状态，例如“开”或“关”。导致载流子空间重定位（例如漂移和扩散）的物理机制可以比基于现有技术装置的性能的复合时间常数快得多。根据本发明的装置在高调制频率下比使用现有技术实现的装置更有效率和通用性。

9. 发明申请

WO0069039A9 BROADENING THE LINEWIDTH OF A SEMICONDUCTOR LASER 审中-公开
标题翻译：弥补半导体激光的线性
公开(公告)号：WO0069039A9
公开(公告)日：2002-02-14
申请号：PCT/US0012689
申请日：2000-05-10
申请人： KVH IND INC
发明人： DYOTT RICHARD B
IPC分类号： H01S5/0683 , G02B6/10 , H01S5/06 , H01S5/062 , H01S5/065
CPC分类号： G02B6/105 , H01S5/0607 , H01S5/06209 , H01S5/06233 , H01S5/065 , H01S5/0652
摘要： The invention is directed to a system and a method for controllably broadening the spectral characteristics, such as the emission linewidth, of a semiconductor laser (24) by discharging an electric pulse, for example, a charged transmission line (20), across the laser terminals. The linewidth-broadened lasers find application in fiber optic sensors, such as fiber optic gyroscopes and current sensors, which have a relatively short de-coherence length.
摘要翻译：本发明涉及一种用于通过在激光器上放电电脉冲（例如，带电传输线（20））可控地加宽半导体激光器（24）的光谱特性（例如发射线宽）的系统和方法终端。线宽扩大的激光器可用于具有相对短的去相干长度的光纤传感器，例如光纤陀螺仪和电流传感器。

10. 发明申请

WO1997032373A1 METHOD AND DEVICE FOR OPERATING A LASER DIODE 审中-公开
标题翻译：方法和一种用于操作激光二极管
公开(公告)号：WO1997032373A1
公开(公告)日：1997-09-04
申请号：PCT/EP1997000814
申请日：1997-02-20
申请人： AGFA-GEVAERT AKTIENGESELLSCHAFT , KAPPELER, Franz
发明人： AGFA-GEVAERT AKTIENGESELLSCHAFT
IPC分类号： H01S03/098
CPC分类号： H01S5/14 , H01S3/082 , H01S5/0608 , H01S5/06209 , H01S5/06213 , H01S5/065 , H01S5/0652 , H01S5/0656 , H01S5/06817 , H01S5/146
摘要： The invention concerns a method of operating a laser diode (2) producing a beam (9) whose intensity is controlled by a control signal and which is directed along a first beam path (10) at the target surface (5), stray reflections from the target surface (5) which are unstable with respect to the diode (2) in time and/or space acting on the diode (2). An element (19, 28, 31, 37, 38) which is stable in time and with respect to the diode (2) in space is used to feed part of the light emitted by the diode back along a second beam path (11) to the active zone (42) of the diode (2) so that the diode (2) is kept in a state of coherence collapse.
摘要翻译：本发明涉及一种用于操作的激光二极管（2），其激光束（9）被引导通过一调整的手段相对于它的强度和通过第一光路（10）调整到暴露区域（5），相对于所述激光二极管（2 ）在时间和/或空间干扰反射（其中用作反射器可用面积5）（在激光二极管2）的行为不稳定。通过的时间和相对于所述激光二极管（2）在空间上稳定的元件（19，28，31，37，38）的装置是的从激光二极管（2）漏出的光通过在所述有源区中的附加的第二光路（11）（42的部分）的激光二极管（2）的反馈，使得所述激光二极管（2）是在相干崩溃的操作状态。

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