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51. 发明授权

US4789843A Laser diode optical modulating devices 失效
标题翻译：激光二极管光调制装置
公开(公告)号：US4789843A
公开(公告)日：1988-12-06
申请号：US78599
申请日：1987-07-28
申请人： John W. Hicks
发明人： John W. Hicks
IPC分类号： H01S3/00 , H01S5/062 , H01L31/02
CPC分类号： H01S3/0064 , H01S5/06209
摘要： An optical modulator for modulating a light beam includes a laser diode having an active region with optically flat faces at opposite ends thereof. The modulator is constructed so that oscillation of the laser diode is suppressed and a time-varying electrical modulation signal is applied to the active region. An optical isolator includes a first electronically controlled optical switch coupled to the isolator input, a second electronically controlled optical switch coupled to the isolator output and means for optical coupling between the first switch and the second switch and having associated delay T.sub.0. Square wave actuation signals are applied to the first and second switches. The square wave signals each have a cycle time T.sub.p =4T.sub.0 and the square wave signal applied to the second switch is delayed relative to the square wave signal applied to the first switch by a time T.sub.0. A single channel isolator provides a 50% duty cycle output, while a two-channel isolator having control signals delayed by one half cycle provides 100% duty cycle output. The isolator control signals can be gated with a modulation signal to provide both modulating and isolating functions.
摘要翻译：用于调制光束的光调制器包括激光二极管，其具有在其相对端具有光学平坦表面的有源区。调制器被构造成使得抑制激光二极管的振荡，并且对有源区域施加时变电调制信号。光隔离器包括耦合到隔离器输入的第一电子控制光开关，耦合到隔离器输出的第二电子控制光开关和用于第一开关和第二开关之间的光耦合并具有相关延迟T0的装置。方波致动信号被施加到第一和第二开关。方波信号各自具有周期时间Tp = 4T0，施加到第二开关的方波信号相对于施加到第一开关的方波信号延迟一段时间T0。单通道隔离器提供50％的占空比输出，而具有延迟半个周期的控制信号的双通道隔离器提供100％的占空比输出。隔离器控制信号可以通过调制信号选通，以提供调制和隔离功能。

52. 发明授权

US4689793A Optical logic and memory apparatus 失效
标题翻译：光逻辑和存储设备
公开(公告)号：US4689793A
公开(公告)日：1987-08-25
申请号：US751707
申请日：1985-07-03
申请人： Jia-ming Liu , Ying C. Chen
发明人： Jia-ming Liu , Ying C. Chen
IPC分类号： H01S5/062 , H01S5/32 , H01S5/323 , H01S3/00
CPC分类号： H01S5/32 , H01S5/06209 , H01S5/06236 , H01S5/3201 , H01S5/32391
摘要： A complete set of optical logic gates and circuits based upon direct polarization switching, and various types of optical flip-flops based upon polarization bistability, in semiconductor lasers are described. By operating the laser in the direct polarization switchable mode, logic gates and circuits such as inverter, AND, NAND, OR and NOR can be provided with two optoelectronic switches or photodetectors. With the laser being operated in the polarization bistable mode, clocked optical flip-flops are operable with a few optoelectronic switches or photodetectors.
摘要翻译：描述了基于直接偏振切换的完整的光学逻辑门和电路以及基于偏振双稳态的各种类型的光学触发器，在半导体激光器中。通过在直接极化切换模式下操作激光器，可以提供两个光电开关或光电检测器等逻辑门和电路，如反相器AND，NAND，OR和NOR。在激光器以偏振双稳态模式工作的情况下，时钟光学触发器可以用几个光电开关或光电探测器工作。

53. 发明授权

US4581743A Semiconductor laser having an inverted layer in a stepped offset portion 失效
标题翻译：半导体激光器在步进偏移部分具有倒置层
公开(公告)号：US4581743A
公开(公告)日：1986-04-08
申请号：US505481
申请日：1983-06-17
申请人： Akira Fujimoto
发明人： Akira Fujimoto
IPC分类号： H01S5/026 , H01S5/028 , H01S5/062 , H01S5/223 , H01S5/40 , H01S3/19
CPC分类号： H01S5/2238 , H01S5/028 , H01S5/06209 , H01S5/4031 , H01S5/026 , H01S5/06243 , H01S5/4043
摘要： An active layer and semiconductor layers putting both sides of the active layer which constitute a double hetero junction construction in a semiconductor crystal comprise a semiconductor of the same kind of conductive type. The double hetero junction portion is formed with an offset portion by a stepped portion. The active layer in the offset portion is formed with a P-N junction portion in a lateral direction. The P-N junction portion is formed by an inverted layer in which different kinds of conductors are diffused in a region from the surface of the semiconductor crystal to the offset portion.
摘要翻译：在半导体晶体中构成双异质结结构的有源层的两侧的有源层和半导体层包括相同种类的导电类型的半导体。双异质结部分由台阶部分形成偏移部分。偏移部分中的有源层在横向方向上形成有P-N接合部分。 P-N结部由反向层形成，其中不同种类的导体在从半导体晶体的表面到偏移部分的区域中扩散。

54. 发明授权

US06907055B2 Method and circuit for measuring the optical modulation amplitude (OMA) in the operating region of a laser diode 有权
标题翻译：用于测量激光二极管工作区域中光调制幅度（OMA）的方法和电路
公开(公告)号：US06907055B2
公开(公告)日：2005-06-14
申请号：US10012910
申请日：2001-11-13
申请人： Sean Morley , Brian Russell
发明人： Sean Morley , Brian Russell
IPC分类号： H01S5/00 , H01S5/062 , H01S3/00
CPC分类号： H01S5/0014 , H01S5/06209
摘要： A method and circuit for measuring the optical modulation amplitude in the operating region of a laser diode is described. The method utilises two measurements of OMA, each measurement being related to the slope in a specific portion of the operating region of the power/current characteristic curve of the laser diode. By combining the two measurement values, the invention provides a 1 measurement for OMA in the operating region of the laser diode that allows for the presence of a non-linear response in the region.
摘要翻译：描述了用于测量激光二极管的工作区域中的光调制幅度的方法和电路。该方法利用OMA的两次测量，每个测量与激光二极管的功率/电流特性曲线的操作区域的特定部分中的斜率相关。通过组合两个测量值，本发明提供了在激光二极管的操作区域中的OMA的1次测量，其允许在该区域中存在非线性响应。

55. 发明申请

US20030090289A1 Method and circuit for measuring the optical modulation amplitude (OMA) in the operating region of a laser diode 有权
标题翻译：用于测量激光二极管工作区域中光调制幅度（OMA）的方法和电路
公开(公告)号：US20030090289A1
公开(公告)日：2003-05-15
申请号：US10012910
申请日：2001-11-13
发明人： Sean Morley , Brian Russell
IPC分类号： G01R031/26
CPC分类号： H01S5/0014 , H01S5/06209
摘要： A method and circuit for measuring the optical modulation amplitude in the operating region of a laser diode is described. The method utilises two measurements of OMA, each measurement being related to the slope in a specific portion of the operating region of the power/current characteristic curve of the laser diode. By combining the two measurement values, the invention provides a 1 measurement for OMA in the operating region of the laser diode that allows for the presence of a non-linear response in the region.
摘要翻译：描述了用于测量激光二极管的工作区域中的光调制幅度的方法和电路。该方法利用OMA的两次测量，每个测量与激光二极管的功率/电流特性曲线的操作区域的特定部分中的斜率相关。通过组合两个测量值，本发明提供了在激光二极管的操作区域中的OMA的1次测量，其允许在该区域中存在非线性响应。

56. 发明授权

US06539134B1 Polarization transformer 失效
公开(公告)号：US06539134B1
公开(公告)日：2003-03-25
申请号：US09337223
申请日：1999-06-22
申请人： Richard B. Dyott
发明人： Richard B. Dyott
IPC分类号： G02B600
CPC分类号： H01S5/0607 , G02B6/105 , 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 presented. The method involves twisting a birefringent fiber through angles that depend on the polarization desired. This technique obviates the need to splice fibers, as in common approaches. In the final step of the method, the polarization can be fine tuned by heating the fiber to cause the core of the fiber to diffuse into the cladding. Also, methods and systems are presented to transform substantially polarized light to substantially randomly polarized light.

57. 发明申请

US20020126981A1 Speckle suppressed laser projection system with partial beam reflection 有权
标题翻译：斑点抑制激光投影系统具有部分光束反射
公开(公告)号：US20020126981A1
公开(公告)日：2002-09-12
申请号：US09788866
申请日：2001-02-20
申请人： Eastman Kodak Company
发明人： James E. Roddy , William R. Markis
IPC分类号： G02B006/00 , H01S003/00
CPC分类号： H04N9/3129 , G02B6/42 , G02B26/101 , G02B27/48 , H01S5/06209 , H01S5/06213 , H01S5/0652
摘要： A system and method for reducing or eliminating the speckle intensity distribution of a laser imaging system. In one embodiment of the invention, a radio frequency signal is injected into a semiconductor laser light source (12) for a projection system (10) to create different speckle patterns that blend together on a projection surface (19). In another embodiment of the invention, optical feedback is used to induce a laser light source for a projection system (10) to create different speckle patterns that blend together on a projection surface (19). In another embodiment of the invention, the laser light source wavelength is Doppler shifted to produce different speckle patterns. In another embodiment of the invention, a means of deflection is used to directionally move the beam to reduce noticeable speckle. Since the eye is very sensitive to horizontal and vertical edges, but less sensitive to angles in between, beam movement of approximately 45 degrees may minimize the loss of MTF in the horizontal and vertical directions.
摘要翻译：一种用于减少或消除激光成像系统的斑点强度分布的系统和方法。在本发明的一个实施例中，将射频信号注入用于投影系统（10）的半导体激光光源（12）中，以在投影表面（19）上产生混合在一起的不同散斑图案。在本发明的另一个实施例中，光学反馈用于诱导用于投影系统（10）的激光光源，以在投影表面（19）上产生混合在一起的不同散斑图案。在本发明的另一实施例中，激光光源波长被多普勒偏移以产生不同的散斑图案。在本发明的另一个实施例中，偏转装置用于定向地移动光束以减少明显的斑点。由于眼睛对水平和垂直边缘非常敏感，但对角度之间的角度较不敏感，大约45度的光束移动可以使水平和垂直方向上MTF的损失最小化。

58. 发明授权

US6107646A Variable light source and optical pickup apparatus for different-type optical disc using the same 失效
标题翻译：可变光源和使用其的不同型光盘的光学拾取装置
公开(公告)号：US6107646A
公开(公告)日：2000-08-22
申请号：US1013
申请日：1997-12-30
申请人： Young Sik Kim
发明人： Young Sik Kim
IPC分类号： G11B7/12 , H01S5/042 , H01S5/062 , H01L29/41 , H01L33/00 , H01S3/19
CPC分类号： H01S5/06209 , H01S5/0425 , H01S5/06243
摘要： A variable light capable of varying the size of light beam and an optical pickup apparatus for a different-type optical disc employing the same. The variable light source is provided with a double hetero structure formed to incorporate a multiple quantum well active layer on a semiconductor layer, a current confined structure for progressing carriers drifting toward the multiple quantum well active layer in a combined direction of a perpendicular direction with a progressing direction of a light beam, and an electrode pattern provided on the upper part of the current confined structure for varying a drift speed of carriers drifting in the progressing direction of light beam by a variable current signal. The variable light source can vary the size of light beam by controlling an amount of the variable current signal. Also, the variable light source generates an appropriate size of light beam in accordance the type of optical disc by the variable current signal, thereby simplifying the configuration of the different-type optical disc pickup apparatus.
摘要翻译：一种能够改变光束尺寸的可变光和使用该可变光的不同型光盘的光拾取装置。可变光源设置有形成为在半导体层上并入多量子阱有源层的双异质结构，用于沿着垂直方向的组合方向向着多量子阱活性层漂移的载流子的电流限制结构与以及设置在电流限制结构的上部的电极图案，用于通过可变电流信号改变在光束的行进方向上漂移的载流子的漂移速度。可变光源可以通过控制可变电流信号的量来改变光束的尺寸。此外，可变光源根据光盘的类型通过可变电流信号产生适当尺寸的光束，从而简化了不同类型的光盘拾取装置的配置。

59. 发明授权

US5987044A Semiconductor light source system having an optimized setting for driving a laser diode 失效
标题翻译：具有用于驱动激光二极管的优化设置的半导体光源系统
公开(公告)号：US5987044A
公开(公告)日：1999-11-16
申请号：US780934
申请日：1996-10-11
申请人： Tetsufumi Odagawa , Kiyohide Wakao
发明人： Tetsufumi Odagawa , Kiyohide Wakao
IPC分类号： H01S5/042 , H01S5/062 , H01S5/068 , H01S5/40 , H01S3/00
CPC分类号： H01S5/4025 , H01S5/06209 , H01S5/06213 , H01S5/06216 , H01S5/068 , H01S5/06812
摘要： A semiconductor light source system includes a laser diode that is operated in a variable temperature environment and a driver circuit, wherein the driver circuit sets a magnitude of a signal current supplied to the laser diode below an upper limit level that corresponds to a maximum operational temperature of the laser diode. The driver circuit simultaneously sets a relative magnitude of the signal current with respect to a bias current such that a sufficient extinction ratio is achieved in an output optical beam and further sets a relative magnitude of the signal current with respect to the bias current such that a sufficiently small oscillation delay is achieved in the laser diode.
摘要翻译：半导体光源系统包括在可变温度环境中操作的激光二极管和驱动电路，其中驱动电路将提供给激光二极管的信号电流的大小设置在对应于最大工作温度的上限电平以下的激光二极管。驱动器电路同时设置相对于偏置电流的信号电流的相对幅度，使得在输出光束中实现足够的消光比，并进一步相对于偏置电流设置信号电流的相对幅度，使得在激光二极管中实现了足够小的振荡延迟。

60. 发明授权

US5764665A Direct modulation of long-cavity semiconductor lasers 失效
标题翻译：直接调制长腔半导体激光器
公开(公告)号：US5764665A
公开(公告)日：1998-06-09
申请号：US756735
申请日：1996-11-26
申请人： Christopher Richard Doerr
发明人： Christopher Richard Doerr
IPC分类号： H01S5/042 , H01S5/062 , H01S5/10 , H01S3/10
CPC分类号： H01S5/042 , H01S5/06209 , H01S5/1082
摘要： The modulation bandwidth of a long-cavity semiconductor laser and a multi-frequency long-cavity semiconductor laser is increased by electronic precompensation of the modulation input. The modulation bandwidth may be further increased by having the modulated amplifier and the desired output as far apart as possible.
摘要翻译：通过调制输入的电子预补偿，增加了长腔半导体激光器和多频率长腔半导体激光器的调制带宽。通过使调制放大器和期望的输出尽可能远离，可以进一步增加调制带宽。

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