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1. 发明授权

US06449049B1 Profiling of aspheric surfaces using liquid crystal compensatory interferometry 有权
标题翻译：使用液晶补偿干涉法分析非球面
公开(公告)号：US06449049B1
公开(公告)日：2002-09-10
申请号：US09540653
申请日：2000-03-31
申请人： Yee Loy Lam , Zhisheng Yun , Yan Zhou , Siu Chung Tam
发明人： Yee Loy Lam , Zhisheng Yun , Yan Zhou , Siu Chung Tam
IPC分类号： G01B902
CPC分类号： G01B11/255
摘要： A method for sensing and analyzing topographic properties of an aspheric test element is disclosed. The principle of the measurement technique is to immerse the element under test into a container filled with liquid crystal. A polarized plane wave passes through front and back precisely processed glass plates of the container sandwiched between a polarizer and an analyzer. The two side plates are not transited by the plane wave of light but are deposited with conductive layers in order to generate an electrical field between them. This DC (direct current) external electrical field is supplied to help to align the molecular direction of the liquid crystal. In a thus-induced desired configuration, the molecular direction of liquid crystal is aligned to be perpendicular to the incident plane wave front. As the plane light wave propagates through the liquid crystal in the container, it will be divided into ordinary and extraordinary beams. These two beams will create interference behind the analyzer. In the presence of the aspheric optical element under test, which is not a uniaxial crystal, a compensatory interferogram will be formed. Analysis of the interferogram will allow the user to determine the topographic surface profile of the aspheric element under test.
摘要翻译：公开了一种用于感测和分析非球面测试元件的地形特性的方法。测量技术的原理是将被测元件浸入装有液晶的容器中。极化平面波通过夹在偏振器和分析器之间的容器的前后精确加工的玻璃板。两个侧板不被光的平面波转移，而是沉积有导电层，以便在它们之间产生电场。该DC（直流）外部电场被提供以帮助对准液晶的分子方向。在如此诱导的期望构型中，液晶的分子方向与入射平面波前垂直。当平面光波通过容器中的液晶传播时，它将被分为普通和非凡光束。这两个光束将在分析仪后面产生干扰。在不是单轴晶体的非球面光学元件的存在下，将形成补偿干涉图。干涉图的分析将允许用户确定被测非球面元件的地形表面轮廓。

2. 发明授权

US06617188B2 Quantum well intermixing 失效
公开(公告)号：US06617188B2
公开(公告)日：2003-09-09
申请号：US09802071
申请日：2001-03-08
申请人： Boon Siew Ooi , Yee Loy Lam , Yuen Chuen Chan , Yan Zhou , Siu Chung Tam
发明人： Boon Siew Ooi , Yee Loy Lam , Yuen Chuen Chan , Yan Zhou , Siu Chung Tam
IPC分类号： H01L2100
CPC分类号： B82Y20/00 , G02B2006/12128 , H01L21/182 , H01S5/026 , H01S5/2063 , H01S5/2068 , H01S5/3413 , H01S5/3414
摘要： The present invention provides a novel technique based on gray scale mask patterning (110), which requires only a single lithography and etching step (110, 120) to produce different thickness of SiO2 implantation mask (13) in selected regions followed by a one step IID (130) to achieve selective area intermixing. This novel, low cost, and simple technique can be applied for the fabrication of PICs in general, and WDM sources in particular. By applying a gray scale mask technique in IID in accordance with the present invention, the bandgap energy of a QW material can be tuned to different degrees across a wafer (14). This enables not only the integration of monolithic multiple-wavelength lasers but further extends to integrate with modulators and couplers on a single chip. This technique can also be applied to ease the fabrication and design process of superluminescent diodes (SLDs) by expanding the gain spectrum to a maximum after epitaxial growth.

3. 发明授权

US06842466B1 Semiconductor passive Q-switch providing variable outputs 有权
标题翻译：半导体无源Q开关提供可变输出
公开(公告)号：US06842466B1
公开(公告)日：2005-01-11
申请号：US09618431
申请日：2000-07-18
申请人： Siu Chung Tam , Jian Hui Gu , Yee Loy Lam
发明人： Siu Chung Tam , Jian Hui Gu , Yee Loy Lam
IPC分类号： G02F1/35 , H01S3/00 , H01S3/0941 , H01S3/098 , H01S3/10 , H01S3/11 , H01S3/113 , H01S3/16
CPC分类号： H01S3/1118 , G02F1/3523 , H01S3/005 , H01S3/09415 , H01S3/113 , H01S3/1611 , H01S3/1673
摘要： A semiconductor wafer with variable transmittance, serves as a saturable absorber for performing passive Q-switching in a laser system to produce laser pulses having defined output characteristics. By translating or rotating the semiconductor saturable absorber, loss properties of a laser cavity may be altered. In this manner, the output characteristics of the laser pulses can be varied without changing other parameters of laser operation. The output characteristics may include pulse duration, pulse repetition rate, peak power and average output power of the laser pulses. The semiconductor wafer can be made of doped or undoped GaAs, AlGaAs, InP, etc. Furthermore, the tunable Q-switch may simultaneously serve as an output coupler for the laser cavity.
摘要翻译：具有可变透射率的半导体晶片用作可饱和吸收体，用于在激光系统中进行无源Q开关以产生具有确定的输出特性的激光脉冲。通过平移或旋转半导体可饱和吸收体，可以改变激光腔的损耗特性。以这种方式，可以改变激光脉冲的输出特性而不改变激光器操作的其它参数。输出特性可以包括激光脉冲的脉冲持续时间，脉冲重复率，峰值功率和平均输出功率。半导体晶片可以由掺杂或未掺杂的GaAs，AlGaAs，InP等制成。此外，可调Q开关可以同时用作激光腔的输出耦合器。

4. 发明授权

US06661827B2 Pumping source 失效
标题翻译：泵送源
公开(公告)号：US06661827B2
公开(公告)日：2003-12-09
申请号：US10196664
申请日：2002-07-15
申请人： Yee Loy Lam , Yuen Chuen Chan , Siu Chung Tam
发明人： Yee Loy Lam , Yuen Chuen Chan , Siu Chung Tam
IPC分类号： H01S30941
CPC分类号： H01S3/025 , H01S3/0405 , H01S3/042 , H01S3/0941
摘要： A pumping module for use in a solid state laser comprises an annular array of laser diode segments (10) forming a passage (24), each segment (10) comprising an extended body supporting a laser diode array (17) that extends along the longitudinal axis of the segment (10) for directing light into the passage (24) from an inner face (12) of the annular array, wherein adjacent side faces of any two segments (10) in the annular array are in sealing engagement. The inner faces (12) of the array of segments (10) form a continuous surface so that coolant can flow between a laser rod and the segments (10) to reduce localized heating.
摘要翻译：用于固体激光器的泵送模块包括形成通道（24）的激光二极管段（10）的环形阵列，每个段（10）包括支撑沿纵向延伸的激光二极管阵列（17）的延伸体（10）的轴线，用于将光从环形阵列的内表面（12）引导到通道（24）中，其中环形阵列中任何两个段（10）的相邻侧面处于密封接合。节段（10）阵列的内表面（12）形成连续表面，使得冷却剂可以在激光棒和段（10）之间流动，以减少局部加热。

5. 发明授权

US07323802B2 Surface acoustic wave device 有权
标题翻译：表面声波装置
公开(公告)号：US07323802B2
公开(公告)日：2008-01-29
申请号：US10296413
申请日：2001-04-27
申请人： Chan Hin Kam , Yee Loy Lam , Yan Zhou , Shide Cheng , Woon Siong Gan
发明人： Chan Hin Kam , Yee Loy Lam , Yan Zhou , Shide Cheng , Woon Siong Gan
IPC分类号： H01L41/08
CPC分类号： H03H9/02574
摘要： A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an electrode layer patterned as two interdigital electrodes and electrical source (2). The device is operated in alternate-phase mode by connecting the two electrodes to different ends of an electrical source (22). The device is operated in single-phase mode by connecting the two electrodes to the same end of an electrical source.
摘要翻译：一种表面声波装置，其可在交替相位模式和单相模式下工作，从而在两个不同频率处产生表面声波。该器件基于沉积在弹性衬底上的压电膜，并且包括图案化为两个指状电极和电源（2）的电极层。该装置通过将两个电极连接到电源（22）的不同端部而以交替模式操作。该器件通过将两个电极连接到电源的同一端而以单相模式工作。

6. 发明授权

US06879740B2 Optical space switch 失效
标题翻译：光学空间开关
公开(公告)号：US06879740B2
公开(公告)日：2005-04-12
申请号：US10288703
申请日：2002-11-06
申请人： Yee Loy Lam , Yuen Chuen Chan , Peh Wei Tan , Bee Khuan Law
发明人： Yee Loy Lam , Yuen Chuen Chan , Peh Wei Tan , Bee Khuan Law
IPC分类号： G02F1/017 , G02F1/313 , G02F1/295
CPC分类号： B82Y20/00 , G02F1/017 , G02F1/313 , G02F1/3138 , G02F2202/108
摘要： A device for optical space switching in optical networks. The optical device comprises a broad area optical waveguide section having a number of electrodes extending over at least a portion of the length of the broad area optical waveguide section. The application of an electrical signal to an electrode causes a local change in effective refractive index of the broad area optical waveguide section, thereby causing light preferentially to propagate along a predetermined path in dependence on the configuration of the electrode. In particular the broad area waveguide device is implemented in indium phosphide (InP).Also described is a method for waveguiding in the optical device.
摘要翻译：一种用于光网络光学空间切换的设备。光学装置包括具有在广域光波导部分的长度的至少一部分上延伸的多个电极的宽区域光波导部分。向电极施加电信号导致广域光波导部分的有效折射率的局部变化，从而根据电极的构造使光优先沿预定路径传播。特别地，广域波导器件采用磷化铟（InP）来实现。还描述了一种用于在光学器件中进行波导的方法。

7. 发明授权

US06862388B2 High density fibre coupling 失效
标题翻译：高密度光纤耦合
公开(公告)号：US06862388B2
公开(公告)日：2005-03-01
申请号：US10207395
申请日：2002-07-30
申请人： Yee Loy Lam
发明人： Yee Loy Lam
IPC分类号： G02B6/12 , G02B6/30 , G02B6/42 , G02B6/43
CPC分类号： G02B6/4214 , G02B6/30 , G02B6/423 , G02B6/43 , G02B2006/12107
摘要： In present invention, a photonic integrated circuit includes a number of optical coupling ports that extend from the surface of the device through at least a dedicated fibre guiding layer or a planar structure for coupling the end of an optical fibre mounted within the optical coupling port to an underlying planar optical wave guide or other light emitting device so that, in use, light is coupled between the underlying optical wave guide or light emitting device and the optical fibre. The other and of the optical fibre may be coupled to an optical fibre holder or to another optical coupling port. An important advantage of the present invention is the flexibility it gives to a designer since it eliminates the need to for waveguides to be routed to the edge of the chip. It also solves the problem of aligning a large number of fibres onto a chip since the optical coupling ports allow fibres to be passively aligned.
摘要翻译：在本发明中，光子集成电路包括多个光耦合端口，其通过至少一个专用光纤引导层或平面结构从器件的表面延伸，用于将安装在光耦合端口内的光纤的端部耦合到下面的平面光波导或其他发光器件，使得在使用中，光耦合在下面的光波导或发光器件与光纤之间。光纤的另一个和光纤可以耦合到光纤保持器或另一个光耦合端口。本发明的一个重要优点在于其对设计者的灵活性，因为它消除了波导路由到芯片边缘的需要。它还解决了将大量光纤对准芯片的问题，因为光耦合端口允许光纤被动对准。

8. 发明授权

US06807215B2 Two-section distributed Bragg reflector laser 失效
标题翻译：两段布拉格反射激光器
公开(公告)号：US06807215B2
公开(公告)日：2004-10-19
申请号：US10266893
申请日：2002-10-08
申请人： Yee Loy Lam , Yuen Chuen Chan , Teik Kooi Ong , Hwi Siong Lim , Lay Cheng Choo , Peh Wei Tan
发明人： Yee Loy Lam , Yuen Chuen Chan , Teik Kooi Ong , Hwi Siong Lim , Lay Cheng Choo , Peh Wei Tan
IPC分类号： H01S500
CPC分类号： B82Y20/00 , H01S5/06256 , H01S5/065 , H01S5/0654 , H01S5/0683 , H01S5/0687 , H01S5/125 , H01S5/3413
摘要： There is provided a semiconductor laser comprising a gain section and an adjacent Bragg section, wherein output laser light is emitted via a facet at an interface between air and the gain section, the Bragg section comprising a distributed reflecting structure having a length substantially greater than required to ensure single longitudinal mode operation of the laser in which the side-mode suppression ratio (SMSR) is 35 dB or more, thereby in use substantially suppressing optical feedback from a facet at an interface between the Bragg section and air, and wherein an interface between the Bragg section and the gain section is quantum well intermixed, thereby rendering the interface substantially anti-reflecting at the wavelength of the laser.
摘要翻译：提供了包括增益部分和相邻布拉格部分的半导体激光器，其中输出激光经由空气和增益部分之间的界面处的刻面发射，布拉格部分包括分布反射结构，其长度显着大于所需的长度为了确保侧模抑制比（SMSR）为35dB以上的激光器的单纵模模式动作，从而基本上抑制了从布拉格部和空气之间的界面的小平面的光反馈，并且其中，界面在布拉格部分和增益部分之间是量子阱良好的混合，从而使界面在激光波长处基本上反射。

9. 发明授权

US06798796B2 Active wavelength locking 失效
标题翻译：主动波长锁定
公开(公告)号：US06798796B2
公开(公告)日：2004-09-28
申请号：US10382119
申请日：2003-03-05
申请人： Nakamura Hiroshi , Yuen Chuen Chan , Yee Loy Lam
发明人： Nakamura Hiroshi , Yuen Chuen Chan , Yee Loy Lam
IPC分类号： H01S310
CPC分类号： H01S5/0687
摘要： A wavelength locked tunable laser source comprising a tunable laser source, an optical reference source characterized by a frequency spectrum with two combs of discrete components of different spacing, an optical mixing device and feedback control circuitry. An optical output of the laser source is heterodyned with an output of the optical reference source at the optical mixing device to produce an electrical signal in dependence on a difference beat frequency of the two optical outputs, the feedback control circuitry being operative to process the electrical signal to provide a feedback signal which is used to tune the wavelength of the laser source so as to minimize the beat frequency and thereby substantially lock the wavelength of the laser source to a wavelength in the spectrum of the optical reference source. The use of an optical reference source with a spectrum comprising two frequency combs provides a mechanism for determining the absolute frequency to which the laser has been locked.
摘要翻译：一种波长锁定可调谐激光源，包括可调激光源，光学参考源，其特征在于具有两个不同间隔的分立组件的梳子的频谱，光学混合装置和反馈控制电路。激光源的光输出在光混合装置处与光参考源的输出进行外差，以根据两个光输出的差拍频产生电信号，反馈控制电路可操作以处理电信号以提供用于调整激光源的波长的反馈信号，以便最小化拍频，从而将激光源的波长基本上锁定到光参考源的光谱中的波长。使用具有包括两个频率梳的频谱的光学参考源提供了用于确定激光器被锁定的绝对频率的机制。

10. 发明授权

US06814500B2 Optical interface utilizing polymer assisted strain relief 失效
标题翻译：光学界面利用聚合物辅助应变消除
公开(公告)号：US06814500B2
公开(公告)日：2004-11-09
申请号：US10305742
申请日：2002-11-27
申请人： Yee Loy Lam , Kian Hin Victor Teo , Poh Lin Chong
发明人： Yee Loy Lam , Kian Hin Victor Teo , Poh Lin Chong
IPC分类号： G02B642
CPC分类号： G02B6/4248
摘要： Disclosed is a strain relief interface for connecting a packaged optical device and an optical fibre. The optical fibre passes through a snout bore extending from a side wall of the package. The interface comprises two moulded jackets. The first moulded jacket surrounds, and is affixed to, a sheathed section of optical fibre from which a fibre jacket has been removed. A first end of the first moulded jacket is affixed to a fibre jacket that encases an adjacent section of optical fibre. A second end of the first moulded jacket is affixed to the snout bore and to a ferrule located within the snout bore. The second moulded jacket surrounds, and is affixed to, the first moulded jacket, a portion of the fibre jacket and the snout bore. Also disclosed is a method for fabricating a strain relief interface.

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