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1. 发明申请

US20050053103A1 Seeking and tracking control for locking to transmision peak for a tunable laser 审中-公开
标题翻译：寻找和跟踪可调谐激光器锁定到传输峰值的控制
公开(公告)号：US20050053103A1
公开(公告)日：2005-03-10
申请号：US10659958
申请日：2003-09-10
申请人： Jiann-Chang Lo , Andrew Daiber , Mark Rice , Rajesh Batra
发明人： Jiann-Chang Lo , Andrew Daiber , Mark Rice , Rajesh Batra
IPC分类号： H04B10/155 , H01S3/10 , H01S3/13
CPC分类号： H04B10/572 , H04B10/504
摘要： A servo or control technique and apparatus for performing wavelength locking employs the phase-shift modulation scheme to adjust one or more optical elements in the laser cavity to lock the lasing frequency toward a desired channel frequency. A controller comprises a high bandwidth mode and a low bandwidth mode. When initially locking to a new channel, the high bandwidth controller mode may be used to supply more energy to drive an actuator to achieve faster seeking. When an error signal approaches within a pre-defined threshold of zero error, the controller may be switched to a lower bandwidth mode supplying less power to the actuator to softly approach the target frequency and avoid overshoot. The lower bandwidth controller mode may keep the noise level lower and provide better frequency tracking stability to the tunable laser.
摘要翻译：用于执行波长锁定的伺服或控制技术和装置采用相移调制方案来调节激光腔中的一个或多个光学元件以将激光频率锁定到期望的通道频率。控制器包括高带宽模式和低带宽模式。当最初锁定到新通道时，高带宽控制器模式可用于提供更多的能量来驱动致动器以实现更快的寻找。当误差信号接近预定义的零误差阈值时，控制器可以切换到较低带宽模式，为致动器提供较少的功率，以轻柔地接近目标频率并避免过冲。较低带宽控制器模式可以使噪声水平更低，并为可调谐激光器提供更好的频率跟踪稳定性。

2. 发明申请

US20050071499A1 Real-time diagnostic data streams for tunable optical devices 审中-公开
标题翻译：可调谐光学器件的实时诊断数据流
公开(公告)号：US20050071499A1
公开(公告)日：2005-03-31
申请号：US10675825
申请日：2003-09-30
申请人： Rajesh Batra , Ken Koller , Jiann-Chang Lo , Andrew Daiber , Mark Rice , David Thiesen
发明人： Rajesh Batra , Ken Koller , Jiann-Chang Lo , Andrew Daiber , Mark Rice , David Thiesen
IPC分类号： H04L12/26 , G06F15/16
CPC分类号： H04L43/00
摘要： An apparatus and method to provide real-time diagnostic data streams for a tunable optical device. Data from a tunable optical device is captured in real-time during operation of the tunable optical device. The data is formatted into data frames and streamed from the tunable optical device via a serial interface. The data is received at a data acquisition unit and stored at a storage device. The data gathered during the operation of the tunable optical device may be studied later to review operations of the tunable optical device and to diagnose errors.
摘要翻译：一种用于为可调光学装置提供实时诊断数据流的装置和方法。来自可调谐光学器件的数据在可调谐光学器件的操作期间被实时捕获。将数据格式化为数据帧，并通过串行接口从可调谐光学设备流式传输。数据在数据获取单元处被接收并存储在存储装置中。以后可以研究在可调谐光学器件的操作期间收集的数据以检查可调谐光学器件的操作并诊断错误。

3. 发明申请

US20080159340A1 External cavity laser tuning element dither servo control 有权
标题翻译：外腔激光调谐元件抖动伺服控制
公开(公告)号：US20080159340A1
公开(公告)日：2008-07-03
申请号：US11647783
申请日：2006-12-29
申请人： Andrew Daiber , Anand S. Ramalingam , Jiann-Chang Lo , Douglas A. Sprock , William B. Chapman
发明人： Andrew Daiber , Anand S. Ramalingam , Jiann-Chang Lo , Douglas A. Sprock , William B. Chapman
IPC分类号： H01S3/106
CPC分类号： H01S5/141 , H01S3/1062 , H01S5/02248 , H01S5/02415 , H01S5/02438 , H01S5/0617 , H01S5/06804 , H01S5/0687
摘要： According to embodiments of the present invention, an external cavity laser includes one or more tuning elements. At least one modulated voltage signal or dither is used to lock the transmission peak of the two tuning elements to each other. The wavelength of the laser also may lock onto the lock transmission peaks. In embodiments in which two dither signals are used, the dither signals may be orthogonal to or independent of each other. The two dither signals may produce two control signals to align the transmission peak of one filter to the transmission peak of another filter and the lasing mode of the laser to the aligned filters.
摘要翻译：根据本发明的实施例，外腔激光器包括一个或多个调谐元件。使用至少一个调制电压信号或抖动来将两个调谐元件的传输峰值彼此锁定。激光器的波长也可能锁定在锁定传输峰值上。在使用两个抖动信号的实施例中，抖动信号可以彼此正交或彼此独立。两个抖动信号可以产生两个控制信号，以将一个滤波器的传输峰值与另一个滤波器的传输峰值对齐，并将激光器的激光模式对齐到对准的滤波器。

4. 发明授权

US06724790B1 Laser facet phase control 有权
标题翻译：激光刻面相位控制
公开(公告)号：US06724790B1
公开(公告)日：2004-04-20
申请号：US10335775
申请日：2002-12-31
申请人： Andrew Daiber , Jiann-Chang Lo , Paul Chi-Hwa Lin
发明人： Andrew Daiber , Jiann-Chang Lo , Paul Chi-Hwa Lin
IPC分类号： H01S304
CPC分类号： H01S5/0687 , H01S5/005 , H01S5/0612 , H01S5/0654 , H01S5/141 , H01S5/142
摘要： A tunable external cavity laser apparatus and method of laser operation. The apparatus includes a gain medium having first and second facets defining a facet laser cavity in which a first portion of light is internally reflected to produce a first lasing condition having a first reflection phase. A reflective element is positioned opposite the second facet of the gain medium, forming an external laser cavity defined by the first facet and reflective element. A second portion of light is internally reflected within the external cavity to produce a second lasing condition having a second reflection phase. A phase adjustment means is employed to adjust the first reflection phase relative to the second reflection phase so as to control a characteristic of the output beam emitted from the apparatus, such as the power output level of the beam. In one aspect, the relative phase is adjusted by controlling the temperature of the gain medium.
摘要翻译：一种可调谐外腔激光装置及其激光手术方法。该装置包括增益介质，该增益介质具有限定小平面激光腔的第一和第二面，其中第一部分光在内部被反射以产生具有第一反射相位的第一激光状态。反射元件与增益介质的第二面相对设置，形成由第一面和反射元件限定的外部激光腔。第二部分光在外部空腔内部反射以产生具有第二反射相位的第二激光条件。使用相位调整装置来相对于第二反射相位调节第一反射相位，以便控制从装置发射的输出光束的特性，例如光束的功率输出电平。在一个方面，通过控制增益介质的温度来调整相对相位。

5. 发明授权

US07468996B2 External cavity laser tuning element dither servo control 有权
公开(公告)号：US07468996B2
公开(公告)日：2008-12-23
申请号：US11647783
申请日：2006-12-29
申请人： Andrew Daiber , Anand S. Ramalingam , Jiann-Chang Lo , Douglas A. Sprock , William B. Chapman
发明人： Andrew Daiber , Anand S. Ramalingam , Jiann-Chang Lo , Douglas A. Sprock , William B. Chapman
IPC分类号： H01S3/10
CPC分类号： H01S5/141 , H01S3/1062 , H01S5/02248 , H01S5/02415 , H01S5/02438 , H01S5/0617 , H01S5/06804 , H01S5/0687
摘要： According to embodiments of the present invention, an external cavity laser includes one or more tuning elements. At least one modulated voltage signal or dither is used to lock the transmission peak of the two tuning elements to each other. The wavelength of the laser also may lock onto the lock transmission peaks. In embodiments in which two dither signals are used, the dither signals may be orthogonal to or independent of each other. The two dither signals may produce two control signals to align the transmission peak of one filter to the transmission peak of another filter and the lasing mode of the laser to the aligned filters.

6. 发明授权

US06661815B1 Servo technique for concurrent wavelength locking and stimulated brillouin scattering suppression 有权
标题翻译：用于并发波长锁定和受激布里渊散射抑制的伺服技术
公开(公告)号：US06661815B1
公开(公告)日：2003-12-09
申请号：US10335684
申请日：2002-12-31
申请人： William J. Kozlovsky , Andrew Daiber , Doug Sprock , Mark S. Rice , Jiann-Chang Lo , Rob Carney
发明人： William J. Kozlovsky , Andrew Daiber , Doug Sprock , Mark S. Rice , Jiann-Chang Lo , Rob Carney
IPC分类号： H01S313
CPC分类号： H04B10/504 , H01S5/0612 , H01S5/0617 , H01S5/06226 , H01S5/0687 , H01S5/14 , H01S5/141 , H04B10/2537
摘要： A servo technique for concurrently providing wavelength locking and stimulated Brillouin scattering (SBS) suppression in an external cavity laser. Respective wavelength locking and SBS suppression signals are generated by a controller and combined into a composite drive signal. The composite drive signal is used to drive an optical path length adjustment element to modulate the optical path length of the laser cavity. The wavelength locking and SBS suppression portions of the drive signals produce concurrent modulations of the laser optical path length having different modulation frequencies and causing different frequency (wavelength) excursions. These modulations produce corresponding wavelength and intensity amplitude modulations in the laser's output. A feedback signal indicative of the intensity amplitude modulations is filtered to attenuate the portion of the signal due to the SBS suppression modulation, and is received as a tuning feedback signal by the controller. In response, the control provides a tuning adjustment signal to adjust the frequency of the laser.
摘要翻译：一种用于在外腔激光器中同时提供波长锁定和受激布里渊散射（SBS）抑制的伺服技术。相应的波长锁定和SBS抑制信号由控制器产生并组合成复合驱动信号。复合驱动信号用于驱动光程长度调节元件以调制激光腔的光程长度。驱动信号的波长锁定和SBS抑制部分产生具有不同调制频率的激光光路长度的并发调制并导致不同的频率（波长）偏移。这些调制在激光输出中产生相应的波长和强度幅度调制。滤波表示强度幅度调制的反馈信号，以衰减由SBS抑制调制引起的信号部分，并由控制器作为调谐反馈信号接收。作为响应，控制提供调谐调节信号以调节激光器的频率。

7. 发明授权

US06667998B1 Thermoelectric cooler linearization in a tunable laser 有权
标题翻译：可调谐激光器中的热电冷却器线性化
公开(公告)号：US06667998B1
公开(公告)日：2003-12-23
申请号：US10396930
申请日：2003-03-24
申请人： Jiann-Chang Lo , Mark S. Rice
发明人： Jiann-Chang Lo , Mark S. Rice
IPC分类号： H01S304
CPC分类号： H01S5/02415 , H01S5/02248 , H01S5/02438 , H01S5/06837 , H01S5/0687 , H01S5/141
摘要： A method for tuning a laser via a temperature control loop that linearizes a non-linear characteristic of a thermal electric cooler (TEC) element used to adjust the temperature of tuning components and corresponding laser apparatus. One or more TEC elements are thermally coupled to respective tuning components, such as etalon filters. The TEC elements provide a heat transfer function (cooling rate) in response to a received electrical input (drive signal), wherein the relationship between the cooling rate and the drive signal is non-linear. An un-compensated drive signal produced by the control loop is compensated such that the open loop gain of the control loop is linearized via a linearizer control block. In effect, the non-linear transfer function of the TEC element is cancelled out by the linearizer control block to produce a linear relationship between the cooling rate and the drive signal. This open loop gain linearization enables tuning events such as channel slewing, and laser start-up operations to be performed with reduced tuning overshoots and undershoots that would otherwise result from the non-linear TEC transfer function characteristic.
摘要翻译：一种用于通过线性化用于调节调谐组件和对应的激光装置的温度的热电冷却器（TEC）元件的非线性特性的温度控制回路来调谐激光的方法。一个或多个TEC元件热耦合到相应的调谐组件，例如标准具过滤器。 TEC元件响应于接收的电输入（驱动信号）提供传热功能（冷却速率），其中冷却速率与驱动信号之间的关系是非线性的。由控制环路产生的未补偿的驱动信号被补偿，使得控制回路的开环增益通过线性化控制块线性化。实际上，TEC元件的非线性传递函数被线性化器控制块消除，以产生冷却速率和驱动信号之间的线性关系。这种开环增益线性化使得可以执行调谐事件，例如通道回转和激光启动操作，同时以非线性TEC传递功能特性导致的调谐过冲和欠冲调降。

8. 发明授权

US5804982A Miniature probe positioning actuator 失效
标题翻译：微型探头定位执行器
公开(公告)号：US5804982A
公开(公告)日：1998-09-08
申请号：US451634
申请日：1995-05-26
申请人： Jiann-Chang Lo , Michael Servedio , James Michael Hammond
发明人： Jiann-Chang Lo , Michael Servedio , James Michael Hammond
IPC分类号： G01L1/00 , G01R1/06 , G01R1/067 , G01R31/28 , G05D3/00 , H01L21/66
CPC分类号： G01R1/06705
摘要： Disclosed is a Mini Probe Positioning Actuator which is low in cost and mass, capable of high accelerations, relatively long stroke and compact packaging. The probe positioning actuator is composed of a pair of substantially parallel cantilevered beams, each beam being comprised of flexible, signal carrying cable formed of a polyimide composition which allows for the probe tip to be suspended from and form part of the armature of the actuator. The armature also includes a pair of oppositely wound coils intermediate the beams, which coils coact electromagnetically with a pair of spaced apart but fixedly positioned (relative to the coils/armature) magnets forming a motor for effecting armature and thus probe tip movement. The light mass of the coils and armature and the dual functional purpose of the suspension beams serves to make the probe actuator highly accurate and sensitive while allowing for reliable operation.
摘要翻译：公开了一种小型探头定位致动器，其成本和质量低，能够高加速度，相对较长的行程和紧凑的包装。探针定位致动器由一对基本上平行的悬臂梁组成，每个梁由柔性的由聚酰亚胺组合物形成的信号承载电缆组成，其允许探针尖端悬挂在驱动器的电枢上并形成其一部分。电枢还包括一对相对缠绕的线圈，该线圈在电磁线圈共同电磁地与一对间隔开但固定地定位（相对于线圈/电枢）磁体形成用于实现电枢并因此探测尖端运动的电动机。线圈和电枢的轻质量以及悬挂梁的双重功能用于使探头致动器高度精确和灵敏，同时允许可靠的操作。

9. 发明授权

US5631856A Test sequence optimization process for a circuit tester 失效
标题翻译：电路测试仪的测试序列优化过程
公开(公告)号：US5631856A
公开(公告)日：1997-05-20
申请号：US373338
申请日：1995-01-17
申请人： Steven A. Keller , Jiann-Chang Lo , James C. Mahlbacher
发明人： Steven A. Keller , Jiann-Chang Lo , James C. Mahlbacher
IPC分类号： G01R1/04 , G01R1/067 , G01R15/12
CPC分类号： G01R1/04 , G01R1/06705
摘要： The sequential order of movements of a number of probes within a circuit test fixture is optimized through the use of an algorithm which sequentially orders test configurations provided in an input list. Each test configuration corresponds to the locations of probes within the fixture as a particular test is performed. In a first pass of the algorithm, for each test configuration, every other test configuration is considered as a next move candidate for which a weighted distance is calculated from the test configuration. Weighting factors reflect the degree of difficulty in moving one direction instead of another. A need to move one probe before another or to move in one direction before another, in order to prevent a collision within the test fixture, is also considered. A predetermined number of next move candidates having the lowest weighted distances are placed in an intermediate list for the test configuration. In a second pass of the algorithm, test configurations are linked, one to another, to form a list reflecting a preferred order of probe movement. In the process of linking with a test configuration, the available next move candidate having the shortest weighted distance is chosen from the intermediate list of the test configuration. If no available next move candidates remain in the intermediate list, the process returns to the first pass of the algorithm to get more next move candidates. Additionally, the algorithm is used to sequentially order individual points for a test fixture having only a single probe.
摘要翻译：通过使用顺序地对输入列表中提供的测试配置进行排序的算法来优化电路测试夹具内的多个探针的顺序顺序。执行特定测试时，每个测试配置对应于夹具内探头的位置。在算法的第一遍中，对于每个测试配置，每个其他测试配置被认为是从测试配置计算加权距离的下一个移动候选。加权因素反映了移动一个方向而不是另一个方向的困难程度。还需要将一个探针移动到另一个之前或者在另一个方向上移动到另一个之前，以便防止测试夹具内的碰撞。具有最低加权距离的预定数量的下一移动候选者被放置在测试配置的中间列表中。在算法的第二遍中，测试配置彼此相连，以形成反映探测器移动的优选顺序的列表。在与测试配置链接的过程中，从测试配置的中间列表中选择具有最短加权距离的可用下一移动候选。如果没有可用的下一个移动候选者保留在中间列表中，则该过程返回到算法的第一遍，以获得更多的下一移动候选。另外，该算法用于顺序地排列仅具有单个探针的测试夹具的单个点。

10. 发明授权

US06252414B1 Method and apparatus for testing circuits having different configurations with a single test fixture 失效
标题翻译：用单个测试夹具测试具有不同结构的电路的方法和装置
公开(公告)号：US06252414B1
公开(公告)日：2001-06-26
申请号：US09140225
申请日：1998-08-26
申请人： James Edward Boyette, Jr. , Jiann-Chang Lo , Yuet-Ying Yu
发明人： James Edward Boyette, Jr. , Jiann-Chang Lo , Yuet-Ying Yu
IPC分类号： G01R3102
CPC分类号： G01R31/2884
摘要： A fixture for testing circuits includes a rectangular array of conductive test pads, alternating with insulating areas in a checkerboard-like pattern. In a first embodiment, the entire array is printed on a central portion of a plastic membrane, with outer portions of the membrane carrying electrical lines from the test pads to connectors. In a second embodiment, the rectangular array is formed on surfaces of a number of closely packet plastic membranes, each of which has tabs extending away from the testing surface to connectors. The test fixture is generic, not being configured for testing a particular circuit configuration. To compensate for conditions of linear misalignment, the rectangular array is moved in a raster pattern having a size equal to the cell size of the rectangular array. To compensate for conditions of angular misalignment, the array may be rotated after such misalignment is measured, or test results may be compared with exemplary data for a number of misalignment conditions.
摘要翻译：用于测试电路的夹具包括导电测试焊盘的矩形阵列，与棋盘状图案的绝缘区域交替。在第一实施例中，整个阵列印刷在塑料膜的中心部分上，膜的外部部分将电线从测试垫传送到连接器。在第二实施例中，矩形阵列形成在多个紧密包装的塑料膜的表面上，每个塑料膜具有从测试表面延伸到连接器的突出部。测试夹具是通用的，未配置用于测试特定的电路配置。为了补偿线性未对准的条件，矩形阵列以尺寸等于矩形阵列的单元大小的光栅图案移动。为了补偿角度未对准的情况，可以在测量这种不对准之后旋转阵列，或者可以将测试结果与许多不对准条件的示例性数据进行比较。

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