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1. 发明授权

US06377396B1 Optical amplifiers with variable optical attenuation for use in fiber-optic communications systems 有权
标题翻译：具有可变光衰减的光放大器，用于光纤通信系统
公开(公告)号：US06377396B1
公开(公告)日：2002-04-23
申请号：US09705760
申请日：2000-11-06
申请人： Yan Sun , Chia-Chi Wang , Yongan Wu , Jun Ye
发明人： Yan Sun , Chia-Chi Wang , Yongan Wu , Jun Ye
IPC分类号： H04B1012
CPC分类号： H04B10/2935 , H01S3/06754 , H01S3/06758
摘要： Optical amplifiers with variable optical attenuators that are adjusted using a sublinear control scheme are provided. Instead of increasing the attenuation of the optical attenuator by Y dBs for each desired Y dBs in decreased optical amplifier gain, the attenuation of the variable optical attenuator is increased by less than Y dBs. This sublinear control scheme improves the noise figure performance of the optical amplifier at the expense of increased gain ripple. The overall performance of the optical amplifier may be improved, particularly in conditions in which the attenuations produced by the variable optical attenuator are relatively large.
摘要翻译：提供使用子线性控制方案调整的具有可变光衰减器的光放大器。在减小的光放大器增益中，不是将光衰减器的衰减增加Y dB，而是可变光衰减器的衰减小于Y dBs。该子线性控制方案以增加的增益波动为代价改善了光放大器的噪声系数性能。特别是在由可变光衰减器产生的衰减相对较大的条件下，可以提高光放大器的整体性能。

2. 发明授权

US06687049B1 Optical amplifiers with stable output power under low input power conditions 失效
标题翻译：在低输入功率条件下具有稳定输出功率的光放大器
公开(公告)号：US06687049B1
公开(公告)日：2004-02-03
申请号：US09929141
申请日：2001-08-15
申请人： James W. Sulhoff , Yongan Wu , Chia-Chi Wang
发明人： James W. Sulhoff , Yongan Wu , Chia-Chi Wang
IPC分类号： H04B1012
CPC分类号： H04B10/296 , H01S3/06754 , H01S3/094011 , H01S3/094061 , H01S3/094096 , H01S3/10015 , H01S3/1301 , H01S3/1305 , H04B10/2912
摘要： Optical amplifiers and optical network equipment are provided that have optical gain stages for amplifying optical signals on a fiber-optic communications link. The optical gain stages may be based on optically pumped fiber such as rare-earth-doped fiber. The fiber may be optically pumped using laser diode pumps. A control unit may be provided in the amplifiers or other equipment to control the laser diode pumps. Optical monitors may be used to measure the optical signals in the amplifiers or other equipment. The pump powers of the laser diode pumps may be adjusted in real time by the control unit based on the measured optical signals to suppress gain transients due to input power fluctuations on the link. To minimize the impact of pump-induced noise, the control unit may avoid operating the laser diodes at powers at which the laser diodes are most susceptible to mode partition noise.
摘要翻译：提供光放大器和光网络设备，其具有用于放大光纤通信链路上的光信号的光增益级。光增益级可以基于诸如稀土掺杂光纤的光泵浦光纤。光纤可以使用激光二极管泵进行光泵浦。可以在放大器或其他设备中设置控制单元以控制激光二极管泵。光学监视器可用于测量放大器或其他设备中的光信号。激光二极管泵的泵浦功率可以由控制单元基于测量的光信号实时调整，以抑制由于链路上的输入功率波动引起的增益瞬变。为了最小化泵浦噪声的影响，控制单元可以避免在激光二极管最容易受到模式分区噪声影响的功率下操作激光二极管。

3. 发明授权

US06583926B1 Optical amplifiers with age-based pump current limiters 有权
标题翻译：具有年龄泵电流限制器的光放大器
公开(公告)号：US06583926B1
公开(公告)日：2003-06-24
申请号：US09993946
申请日：2001-11-27
申请人： Yongan Wu , Jun Ye
发明人： Yongan Wu , Jun Ye
IPC分类号： H04B1012
CPC分类号： H04B10/2931 , H01S3/094011 , H01S3/09415 , H01S3/1301 , H01S5/0021 , H04B2210/003
摘要： Optical amplifiers and other optical network equipment for handling optical data signals in fiber-optic communications links are provided. Optical fiber that is pumped by laser diode pumps is used to provide optical gain. The laser diode pumps may be based on laser diode devices that do not have temperature controllers and integral back facet monitors. A control unit may be used to keep track of the age of the laser diode pumps. Information on the age of the pumps may be used to determine the maximum allowable drive current for driving the pumps. Information on the age of the pumps may also be used to select an appropriate drive current level during operation of the pumps.
摘要翻译：提供用于处理光纤通信链路中的光数据信号的光放大器和其他光网络设备。激光二极管泵浦的光纤用于提供光学增益。激光二极管泵可以基于没有温度控制器和整体式后面监视器的激光二极管装置。控制单元可用于跟踪激光二极管泵的寿命。关于泵的年龄的信息可以用于确定用于驱动泵的最大允许驱动电流。关于泵的年龄的信息也可用于在泵的运行期间选择适当的驱动电流水平。

4. 发明授权

US06456429B1 Double-pass optical amplifier 失效
标题翻译：双路光放大器
公开(公告)号：US06456429B1
公开(公告)日：2002-09-24
申请号：US09711917
申请日：2000-11-15
申请人： Yongan Wu
发明人： Yongan Wu
IPC分类号： H01S532
CPC分类号： H01S5/50 , H01S5/10 , H01S5/1085
摘要： Novel optical amplifier designs are disclosed. The optical amplifier generally comprises an amplification section having an anti-reflection coating on a first end face and a reflector optically coupled to a second end face. The amplification section of the amplifier interacts with the input and reflected optical signals to produce an amplified optical signal. The amplification section may include rare earth doped glass amplifiers (e.g., erbium-doped amplifiers), rare earth doped waveguide amplifiers (e.g. erbium-doped waveguide amplifiers), polymer amplifiers or parametric amplifiers. The amplifier may include a waveguide structure proximate the amplification section to confine optical signals within the amplification section and/or guide signals into and out of the amplifier. The amplifier may be combined with optical components for coupling signals between optical fibers and the amplifier. The waveguide may have a modified “V” shape where the “V” with at two legs. At least one leg of the “V” is bent so that both legs intersect the first end face substantially parallel to each other.
摘要翻译：公开了新的光放大器设计。光放大器通常包括放大部分，其具有在第一端面上的防反射涂层和与第二端面光学耦合的反射器。放大器的放大部分与输入和反射光信号相互作用以产生放大的光信号。放大部分可以包括稀土掺杂的玻璃放大器（例如，掺铒放大器），稀土掺杂波导放大器（例如掺铒波导放大器），聚合物放大器或参数放大器。放大器可以包括靠近放大部分的波导结构，以将放大部分内的光信号和/或引导信号限制在放大器内和从放大器输出。放大器可以与用于耦合在光纤和放大器之间的信号的光学部件组合。波导可以具有修改的“V”形，其中在两条腿处具有“V”形。 “V”的至少一条腿弯曲，使得两条腿基本上彼此平行地与第一端面相交。

5. 发明授权

US06423963B1 Safety latch for Raman amplifiers 有权
标题翻译：拉曼放大器的安全锁存器
公开(公告)号：US06423963B1
公开(公告)日：2002-07-23
申请号：US09626092
申请日：2000-07-26
申请人： Yongan Wu
发明人： Yongan Wu
IPC分类号： G01J104
CPC分类号： G01J3/02 , G01J3/0218 , G02B6/4246 , G02B2006/4297 , H01S3/094 , H01S3/094046 , H01S3/1305 , H01S3/1312 , H01S3/302
摘要： A method and apparatus for shutting off a source of optical power to an optical fiber in the event of a cut in the fiber are disclosed. Embodiments of the invention are particularly suited in fiber optic communications systems that use Raman pumps for signal amplification. Optical power from the pump to a fiber is shut off in response to a change in a supervisor signal provided to a first end of the fiber. The supervisor signal is generally operated in an “always-on” mode to provide for fail-safe operation. The apparatus generally comprises a controller coupled to the source of optical power and means for coupling a supervisor signal, which has been provided to a first end of the fiber, to the controller. The method and/or apparatus may be incorporated into an optical communications system having an optical fiber and two or more hubs coupled to the fiber.
摘要翻译：公开了一种在纤维切割的情况下切断光纤的光功率源的方法和装置。本发明的实施例特别适用于使用拉曼泵进行信号放大的光纤通信系统。响应于提供给光纤的第一端的监视器信号的变化，关闭从泵到光纤的光功率。主管信号通常以“永远在线”模式运行，以提供故障安全操作。该装置通常包括耦合到光功率源的控制器和用于将已经提供给光纤的第一端的监控器信号耦合到控制器的装置。该方法和/或装置可以并入具有耦合到光纤的光纤和两个或更多个集线器的光通信系统中。

6. 发明申请

US20070050374A1 Novel intelligent search engine 审中-公开
标题翻译：新型智能搜索引擎
公开(公告)号：US20070050374A1
公开(公告)日：2007-03-01
申请号：US11217148
申请日：2005-09-01
申请人： Fang Zhao , Yongan Wu
发明人： Fang Zhao , Yongan Wu
IPC分类号： G06F17/30
CPC分类号： G06F16/3329
摘要： A novel intelligent search engine or website are invented to enhance the web surfing practice. A smart search engine or website comprising of resource database, fuzzy logic analyzer, and question generator which can analyze the user input, comparing with internal criteria, and asking user further questions to narrow down the search. The smart search engine or website can show the desired search result link/links, or show compose customized answer page, or show the desired web page directly. The smart search engine or website can comprise of user database which it uses during the search and modifies during the search.
摘要翻译：发明了一种新颖的智能搜索引擎或网站，以增强网络冲浪实践。智能搜索引擎或网站，包括资源数据库，模糊逻辑分析器和问题生成器，可以分析用户输入，与内部标准进行比较，并向用户询问进一步的问题来缩小搜索范围。智能搜索引擎或网站可以显示所需的搜索结果链接/链接，或显示撰写自定义的答案页面，或直接显示所需的网页。智能搜索引擎或网站可以包括其在搜索期间使用的用户数据库，并且在搜索期间进行修改。

7. 发明授权

US06625347B1 Pumps for Raman amplifier systems 失效
标题翻译：拉曼放大器系统泵
公开(公告)号：US06625347B1
公开(公告)日：2003-09-23
申请号：US09798927
申请日：2001-03-06
申请人： Yongan Wu
发明人： Yongan Wu
IPC分类号： H01S330
CPC分类号： H01S3/094003 , H01S3/06725 , H01S3/094073 , H01S3/094096 , H01S3/302 , H01S5/02252 , H01S5/146
摘要： Raman amplifiers are provided for amplifying signals on optical communications links. The Raman amplifiers may be pumped using an unpolarized Raman pump source. Gain for the source may be provided by a semiconductor device that provides linearly-polarized pump light. A polarization-maintaining fiber may be coupled directly to the semiconductor device at a 45° orientation with respect to the polarization of the light emitted by the device. Light from the semiconductor device may be launched equally into both the slow and fast axes of the fiber. A fiber Bragg grating reflector may be used to stabilize the pump. Pump light traveling along the slow and fast axes becomes spatially separated by more than the coherence length of the multiple quantum well device. The pump light exiting the end of the polarization-maintaining fiber is therefore unpolarized.
摘要翻译：提供拉曼放大器用于放大光通信链路上的信号。可以使用非偏振拉曼泵浦源来泵浦拉曼放大器。源极的增益可以由提供线性偏振的泵浦光的半导体器件提供。偏振保持光纤可以相对于由器件发射的光的偏振以45°取向直接耦合到半导体器件。来自半导体器件的光可以同时发射到光纤的慢轴和快轴。可以使用光纤布拉格光栅反射器来稳定泵。沿着慢速和快轴行进的泵浦光通过多个量子阱装置的相干长度在空间上分开。因此，离开保偏光纤的端部的泵浦光是非偏振的。

8. 发明授权

US06499888B1 Wide ridge pump laser 失效
标题翻译：宽脊泵激光器
公开(公告)号：US06499888B1
公开(公告)日：2002-12-31
申请号：US09466973
申请日：1999-12-20
申请人： Yongan Wu
发明人： Yongan Wu
IPC分类号： G02B636
CPC分类号： H01S5/22 , G02B6/30 , G02B6/4203 , G02B6/4204 , H01S3/094003 , H01S3/09415 , H01S5/02216 , H01S5/02284 , H01S5/0267 , H01S5/0655 , H01S5/1064 , H01S5/147 , H01S5/20 , H01S5/2231
摘要： A laser pump module has a ridge waveguide chip with a ridge width that is greater than 4 micrometers (&mgr;m). This is a relatively wide ridge for this class of laser chips. Specifically, especially for signal lasers, narrow ridge widths are used in order to control lateral and transverse mode shape and size. In the present invention, however, where a chip is used for pump applications, a wider ridge is used to increase the laser effective gain volume and decrease the loss associated with the lowest order transverse mode to thus maximize the useful power and light that is coupled into the fiber pigtail.
摘要翻译：激光泵模块具有脊宽度大于4微米（mum）的脊形波导芯片。对于这类激光芯片而言，这是一个相对较宽的脊。具体地说，特别是对于信号激光器，为了控制横向和横向模式的形状和尺寸，使用窄脊宽度。然而，在本发明中，当芯片用于泵应用时，使用更宽的脊来增加激光有效增益体积并减少与最低阶横模相关联的损耗，从而最大化有用功率和耦合的光进入纤维尾纤。

9. 发明授权

US06375364B1 Back facet flared ridge for pump laser 失效
标题翻译：泵浦激光器的背面喇叭脊
公开(公告)号：US06375364B1
公开(公告)日：2002-04-23
申请号：US09477697
申请日：2000-01-06
申请人： Yongan Wu
发明人： Yongan Wu
IPC分类号： G02B636
CPC分类号： G02B6/1228 , G02B6/305 , G02B6/4203 , G02B6/4207 , H01S3/0941 , H01S5/02216 , H01S5/02284 , H01S5/0267 , H01S5/0655 , H01S5/1064 , H01S5/146 , H01S5/147 , H01S5/20 , H01S5/22 , H01S5/2231
摘要： A laser pump module has a ridge waveguide chip with a ridge width that is flared in the direction of the rear facet. Such a ridge profile yields a number of advantages depending on the specific implementation. The resulting increase in area of the rear facet, spreads heat, to improve device performance and avoid catastrophic optical mirror damage (COD). It can also lower the power density for the same output intensity. Further, it contributes to the single lateral mode property, acting as a mode filter. Higher order modes suffer higher losses and thus, tending to contribute to their attenuation—with less light fed back into the cavity from the rear facet, the laser device as a whole has reduced outside feedback sensitivity. Thus, in the implementation as a pump laser, less light at the signal wavelength returns to be amplified in a majority of the pump's ridge waveguide cavity. Still further, any back facet power monitor can be moved to improve its sensitivity level due to the large output and input area.
摘要翻译：激光泵模块具有脊形波导芯片，该脊波导芯片的脊宽度在后方向的方向上展开。这种脊形轮廓根据具体实现产生许多优点。由此造成后面积增加，扩散热量，提高装置性能，避免灾难性光学镜损坏（COD）。它也可以降低相同输出强度的功率密度。此外，它有助于作为模式滤波器的单个横向模式特性。较高阶模式遭受更高的损耗，因此倾向于有助于衰减，由于较少的光从后面反射回到空腔中，激光装置整体上减少了外部的反馈灵敏度。因此，在作为泵浦激光器的实现中，信号波长处的较少的光返回在大多数泵的脊形波导腔中被放大。此外，由于输出和输入面积大，任何背面功率监视器都可以移动以提高其灵敏度。

10. 发明授权

US6148268A Method for quality control and yield enhancement 失效
标题翻译：质量控制和产量提高的方法
公开(公告)号：US6148268A
公开(公告)日：2000-11-14
申请号：US88957
申请日：1998-06-02
申请人： Yongan Wu , Constance J. Chang-Hasnain
发明人： Yongan Wu , Constance J. Chang-Hasnain
IPC分类号： G06Q10/04 , G06F15/00
CPC分类号： G06Q10/04
摘要： An efficient method for optimization of product characteristics or manufacturing processes. The method utilized a Chi-square model to identify error sources that contribute to the product or process variability. The method is particularly useful for evaluation of processes related to optics and electronics fabrication but also has application in fields where a chi-square distribution is observed.
摘要翻译：用于优化产品特性或制造工艺的有效方法。该方法利用卡方模型来识别有助于产品或过程变异性的误差源。该方法对于与光学和电子制造相关的过程的评估特别有用，但也可用于观察到卡方分布的领域。

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