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1.发明授权System and method for reducing interferometric distortion and relative intensity noise in directly modulated fiber optic links 有权用于减少直接调制光纤链路中的干涉失真和相对强度噪声的系统和方法公开(公告)号：US07725043B2
公开(公告)日：2010-05-25
申请号：US10960159
申请日：2004-10-07
CPC分类号： H04B10/504 , H01S5/06817
摘要： A laser transmitter with a feedback control loop for minimizing noise. The novel laser transmitter includes a laser, an external reflector adapted to form an extended cavity to the laser, and a feedback control loop adapted to detect noise in the laser and in accordance therewith, adjust the optical phase of the extended cavity such that the noise is at a desired level. The optical phase of the extended cavity is adjusted by adjusting an operating parameter of the laser, such as its bias current. In an illustrative embodiment, the feedback control loop is adapted to compute the rate of change of the noise with respect to bias current and in accordance therewith, adjust the bias current of the laser such that relative intensity noise and interferometric intermodulation distortion are simultaneously minimized.
摘要翻译： 具有反馈控制回路的激光发射器，用于最小化噪声。 新颖的激光发射器包括激光器，适于形成到激光器的延伸空腔的外部反射器，以及适于检测激光器中的噪声的反馈控制回路，并且根据该激光器调节扩展腔体的光学相位，使得噪声 处于所需的水平。 通过调整激光器的工作参数（如偏置电流）来调节扩展腔的光学相位。 在说明性实施例中，反馈控制环路适于计算噪声相对于偏置电流的变化率，并且根据其调整激光器的偏置电流，使得相对强度噪声和干涉式互调失真同时最小化。
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2.发明授权Methods and apparatus for locking the optical phase of single-sideband amplitude-modulation signals 有权用于锁定单边带幅度调制信号的光相位的方法和装置公开(公告)号：US08879916B1
公开(公告)日：2014-11-04
申请号：US13310770
申请日：2011-12-04
申请人： Willie W. Ng , David L. Persechini
发明人： Willie W. Ng , David L. Persechini
CPC分类号： H04B10/25759
摘要： This invention provides an approach to lock the optical phase of a single sideband, carrier-suppressed coherent-AM analog optical link, so that for example an RF signal can be transmitted with high fidelity over fibers. In some embodiments, a method comprises providing a RF locking signal; impressing an RF input signal and the RF locking signal onto the optical field of a suppressed carrier; introducing the optical spectrum to a photonic integrated circuit comprising a microresonator filter and a finite impulse response filter; selectively passing the double sideband, associated with the locking frequency, through the finite impulse response filter; and recovering a RF output signal, wherein a feedback loop provides dithering to stabilize the optical phase of the link and thus preserve amplitude/phase integrity for the RF-photonic signal. The disclosed method is especially suited to the filtering of RF-photonic signals via use of the resonance passbands derived from microdisks or micro-rings.
摘要翻译： 本发明提供了锁定单个边带，载波抑制的相干AM模拟光链路的光相位的方法，使得例如可以在光纤上以高保真度传输RF信号。 在一些实施例中，一种方法包括提供RF锁定信号; 将RF输入信号和RF锁定信号施加到抑制载波的光场上; 将光谱引入包括微谐振器滤波器和有限脉冲响应滤波器的光子集成电路; 通过有限脉冲响应滤波器选择性地通过与锁定频率相关联的双边带; 并且恢复RF输出信号，其中反馈环路提供抖动以稳定链路的光学相位，并因此保持RF-光子信号的振幅/相位完整性。 所公开的方法特别适用于通过使用从微盘或微环获得的共振通带来对RF-光信号进行滤波。
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公开(公告)号：US20120307336A1
公开(公告)日：2012-12-06
申请号：US13572119
申请日：2012-08-10
摘要： The present invention is a programmable and latching retro-reflective construct suitable for use as an optical label in an optical labeling system. The invention contains retro-reflective structures such as lens beads, corner cubes or other retro-reflecting type structures. The retro-reflective construct further comprises a wavelength selective, programmable and latching reflecting structure located at the reflecting surfaces of the retro-reflective structures. The optical construct can optionally contain additional optical filtering structures. Methods for fabricating the invention are also described.
摘要翻译： 本发明是一种适用于光学标签系统中的光学标签的可编程和锁定后向反射结构。 本发明包含诸如透镜珠，角立方体或其它后反射型结构的回射结构。 逆反射结构还包括位于反射反射结构的反射表面处的波长选择性，可编程和闭锁反射结构。 光学构造可任选地包含附加的光学滤波结构。 还描述了制造本发明的方法。
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4.发明授权Method and apparatus for microwave signal generation that uses polarization selective photonic mixing 有权使用偏振选择性光子混合的微波信号生成方法和装置公开(公告)号：US06262681B1
公开(公告)日：2001-07-17
申请号：US09393106
申请日：1999-09-09
申请人： David L. Persechini
发明人： David L. Persechini
IPC分类号： G01S1388
摘要： A method and apparatus for generating microwave signal frequencies. An incident reference signal is provided. A first stimulus signal is also provided, the first stimulus signal having a first polarization and having a first predetermined relationship with the incident reference signal. A second stimulus signal is also provided, the second stimulus signal having a second polarization and having a second predetermined relationship with the incident reference signal. The incident reference signal is split into a first polarization reference signal and into a second polarization reference signal. The first stimulus signal is coupled with the first polarization reference signal to provide first polarization mixed signals. The second stimulus signal is coupled with the second polarization reference signal to provide second polarization mixed signals. The first polarization mixed signals are combined with the second polarization mixed signals to provide output signals having only a first component signal at the first predetermined relationship with the incident reference signal and a second component signal at the second predetermined relationship with the incident reference signal. The first predetermined relationship with the incident reference signal is provided by a first phase lock loop and the second predetermined relationship with the incident reference signal is provided by a second phase lock loop.
摘要翻译： 一种产生微波信号频率的方法和装置。 提供入射参考信号。 还提供第一激励信号，第一激励信号具有第一偏振并且与入射参考信号具有第一预定关系。 还提供第二刺激信号，第二刺激信号具有第二偏振并且与入射参考信号具有第二预定关系。 入射参考信号被分成第一偏振参考信号，并被分成第二偏振参考信号。 第一激励信号与第一偏振参考信号耦合以提供第一偏振混合信号。 第二激励信号与第二偏振参考信号耦合以提供第二偏振混合信号。 第一偏振混合信号与第二偏振混合信号组合，以提供仅具有与入射参考信号处于第一预定关系的第一分量信号和与入射参考信号成第二预定关系的第二分量信号的输出信号。 与入射参考信号的第一预定关系由第一锁相环提供，并且与入射参考信号的第二预定关系由第二锁相环提供。
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公开(公告)号：US4348587A
公开(公告)日：1982-09-07
申请号：US207107
申请日：1980-11-17
IPC分类号： G01R15/24 , G01R33/032 , G01R31/00
CPC分类号： G01R33/0327 , G01R15/248
摘要： A multi-mode optical fiber is used to detect electrical currents or magnetic fields from a remote source. The optical fiber, which serves as the sensor, is composited with metal capable of conducting electricity. Optical radiation is introduced into the fiber from a source which may be either coherent or incoherent. An electrical current is applied to the portion of the electrically conducting optical fiber and a magnetic field is applied to the current-carrying optical fiber. A known value of one permits a determination of the presence or absence of the other through electromotive forces on a metallic conductor in a magnetic field, which are used to induce differential phase shifts (coherent optical radiation input) or losses (incoherent optical radiation input) between the fiber modes. These phase shifts or losses are detected by a suitable detector. For a magnetic field of 1 kGauss, good linearity is obtained in the 5 to 2,000 mA current range. Magnetic fields of about 0.1 G to 1 kG are detected employing a current source of about 5 mA to 50 A.
摘要翻译： 多模光纤用于检测来自远程源的电流或磁场。 用作传感器的光纤与能够导电的金属复合。 从可能是相干或不相干的光源将光辐射引入到光纤中。 对导电光纤的部分施加电流，并且对载流光纤施加磁场。 一个已知的值允许通过用于诱导差分相移（相干光辐射输入）或损耗（非相干光辐射输入）的磁场中的金属导体上的电动势来确定另一个的存在或不存在， 在光纤模式之间。 这些相移或损耗由合适的检测器检测。 对于1 kGauss的磁场，在5至2,000 mA电流范围内可获得良好的线性度。 使用约5mA至50A的电流源检测约0.1G至1kG的磁场。
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公开(公告)号：US08274727B1
公开(公告)日：2012-09-25
申请号：US11932370
申请日：2007-10-31
摘要： The present invention is a programmable and latching retro-reflective construct suitable for use as an optical label in an optical labeling system. The invention contains retro-reflective structures such as lens beads, corner cubes or other retro-reflecting type structures. The retro-reflective construct further comprises a wavelength selective, programmable and latching reflecting structure located at the reflecting surfaces of the retro-reflective structures. The optical construct can optionally contain additional optical filtering structures. Methods for fabricating the invention are also described.
摘要翻译： 本发明是一种适用于光学标签系统中的光学标签的可编程和锁定后向反射结构。 本发明包含诸如透镜珠，角立方体或其它后反射型结构的回射结构。 逆反射结构还包括位于反射反射结构的反射表面处的波长选择性，可编程和闭锁反射结构。 光学构造可任选地包含附加的光学滤波结构。 还描述了制造本发明的方法。
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公开(公告)号：US4403825A
公开(公告)日：1983-09-13
申请号：US206797
申请日：1980-11-14
CPC分类号： G02B6/12004 , G02B6/1245
摘要： There is disclosed a class of integrated optics devices comprising a variety of optical elements such as waveguides, lenses, couplers and the like, and a method of fabrication thereof. In particular, there is disclosed an aberration-free geodesic lens for integrated optics devices. In these devices, photo-induced refractive index changes in chalcogenide glass films may be used to fabricate a radial index of refraction distribution profile in order to form a lens. By varying the exposure of the thin film to ultra-violet light, variable index of refraction profiles may be formed. The variable profile may itself form the lens or, preferably, a thin film may be deposited on an aspherical geodesic lens in order to provide correction of focal length, thus reducing the mechanical tolerances required in the grinding process. These devices thus permit a degree of freedom heretofore unobtained in thin film optical waveguides for use in such devices as a spectrum analyzer operating at the 0.9 to 1.0 micrometer region of the infrared. An important advantage of this approach is that it is compatible with the use of high index of refraction materials, which are basic materials for electro-optic and acousto-optic devices.
摘要翻译： 公开了一类包括波导，透镜，耦合器等各种光学元件的集成光学器件及其制造方法。 特别地，公开了一种用于集成光学器件的无像差的测地镜。 在这些器件中，硫族化物玻璃薄膜的光诱导折射率变化可用于制造折射分布分布的径向折射率以形成透镜。 通过改变薄膜对紫外光的曝光，可以形成可变的折射率分布。 可变轮廓本身可以形成透镜，或者优选地，薄膜可以沉积在非球面测地镜上，以便提供焦距的校正，从而减少研磨过程中所需的机械公差。 因此，这些装置允许在诸如在红外线的0.9至1.0微米区域中操作的频谱分析仪的薄膜光波导中获得的自由度是不可获得的。 这种方法的一个重要优点是它与使用高折射率材料兼容，折射材料是电光和声光器件的基本材料。
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8.发明授权Optoelectronic modulator and electric-field sensor with multiple optical-waveguide gratings 有权具有多个光波导光栅的光电调制器和电场传感器公开(公告)号：US07657132B1
公开(公告)日：2010-02-02
申请号：US12141825
申请日：2008-06-18
申请人： Daniel Yap , David L. Persechini , Kevin Geary
发明人： Daniel Yap , David L. Persechini , Kevin Geary
IPC分类号： G02F1/295
CPC分类号： G02F1/035 , G02F2201/17 , G02F2201/30
摘要： An optoelectronic-RF device has at least one optical modulator/sensor comprising at least two cascaded optical-waveguide gratings and at least one non-grating optical waveguide segment interconnecting the at least two cascaded optical-waveguide gratings, with at least one optical waveguide segment interconnecting the at least two cascaded optical-waveguide gratings via the at least one non-grating optical waveguide segment. An RF waveguide is provided for propagating an RF electric field, the at least one optical modulator/sensor being disposed in and forming a portion of the RF waveguide with light propagating through the cascaded optical-waveguide gratings in a direction that is perpendicular to a direction of propagation of the RF electric field in the RF waveguide.
摘要翻译： 光电RF器件具有至少一个光调制器/传感器，其包括至少两个级联的光波导光栅和至少一个将至少两个级联光波导光栅互连的至少一个非光栅光波导段与至少一个光波导段 经由所述至少一个非光栅光波导段将所述至少两个级联的光波导光栅互连。 提供RF波导用于传播RF电场，所述至少一个光学调制器/传感器被布置在RF波导的一部分中并且形成RF波导的一部分，光在垂直于方向的方向上传播通过级联的光波导光栅 在RF波导中RF电场的传播。
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公开(公告)号：US4711514A
公开(公告)日：1987-12-08
申请号：US690792
申请日：1985-01-11
CPC分类号： G02B6/1342 , G02B6/1228
摘要： A method of forming a tapered optical waveguide within a substrate (2). An appropriate substrate (2) is coated with a layer of barrier material (4) such as silicon dioxide which provides a relatively tight matrix relative to the open matrix of the substrate (2). The barrier material (4) is deposited on the substrate with a sloping variable thickness that is inversely related to the desired depth of the waveguide taper. The barrier material (4) can be deposited through a vacuum deposition technique and subsequently subjected to ion-milling to provide the desired taper. An appropriate source of metal ions (6), such as silver, capable of being transferred, such as by diffusion into the substrate (2) for increasing the refractive index and thereby defining a waveguide, is then transmitted to and through the barrier material (4). The metal (6) may be coated on the tapered barrier material (4), and then diffused into the substrate (2) through the barrier material (4) which provides a controlled transmission of the ions proportional to its thickness. The substrate ( 2) can then be cleaned to strip both the barrier material (4) and residual metal (6) for subsequent processing. The resulting product of this process is a superior tapered optical waveguide device that can be economically manufactured.
摘要翻译： 一种在衬底（2）内形成锥形光波导的方法。 涂覆有一层隔离材料（4）的适当的基底（2），例如二氧化硅，其相对于基底（2）的开放基质提供相对紧密的基质。 阻挡材料（4）以与波导锥度的期望深度成反比关系的倾斜可变厚度沉积在基板上。 阻挡材料（4）可以通过真空沉积技术沉积，随后进行离子铣削以提供所需的锥度。 然后将能够被转移的适当的金属离子（6）源，例如通过扩散到衬底（2）中以增加折射率并由此限定波导，然后传递到穿过阻挡材料（ 4）。 金属（6）可以涂覆在锥形阻挡材料（4）上，然后通过阻挡材料（4）扩散到衬底（2）中，阻挡材料（4）提供与其厚度成比例的受控的离子透射。 然后可以清洁衬底（2）以剥离阻挡材料（4）和残余金属（6）以用于随后的处理。 该方法的最终产品是可以经济地制造的优异的锥形光波导器件。
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