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    • 7. 发明授权
    • Fiber-optic equalizer
    • 光纤均衡器
    • US5054875A
    • 1991-10-08
    • US561176
    • 1990-08-01
    • Mark E. Curran
    • Mark E. Curran
    • G02B6/26G02B6/34H04B10/2581
    • G02B6/29358G02B6/26H04B10/2581
    • A multi-mode optical fiber segment having partially reflecting mirrors on each end functions as a resonant cavity with respect to the modulation frequency when the length of the fiber is equal to one-half the modulation wavelength of the light injected into the fiber. Modulated light is injected through a hole in the mirror at one end, either from a fiber, a waveguide, or directly from a laser diode. The core diameter of the cavity fiber is limited only by the requirement that it must be much larger than the input hole. Light exits though a hole in the mirror opposite the input hole. Upon entry into the resonant cavity, light is subject to multi-modal propagation resulting in dispersion. The resultant output light of the fiber is lower overall in intensity, but its useful frequency response is expanded by the bandpass half-skirt of the fiber-optic filter.
    • 当纤维的长度等于注入光纤的光的调制波长的二分之一时,在每个端部上具有部分反射镜的多模光纤段相对于调制频率用作谐振腔。 调制光通过光纤,波导或直接来自激光二极管的一端的反射镜中的孔注入。 腔体光纤的芯径仅受到必须比输入孔大得多的要求的限制。 光通过镜子的入口孔相对的孔而离开。 在进入谐振腔时,光经受多模式传播,导致分散。 光纤的合成输出光强度总体较低,但其有用的频率响应由光纤滤波器的带通半裙部扩展。
    • 8. 发明授权
    • Optical modulator noise nonlinearity reduction circuit
    • 光调制器噪声非线性降低电路
    • US5166509A
    • 1992-11-24
    • US610958
    • 1990-11-09
    • Mark E. Curran
    • Mark E. Curran
    • H04B10/155
    • H04B10/5051H04B10/50593H04B10/588
    • An optical modulator or laser source has a detector for detecting its output signal and for producing a corresponding output signal. A tapping device is connected to tap off a portion of the input modulation signal as a reference signal. The reference signal is compared and subtracted from the detector output signal by a subtraction unit in order to produce an error output signal which will be proportional to the laser noise/distortion components. This error signal is amplified and connected to an external modulator linked to the laser optical output and intensity modulates the laser output signal by the error signal in order to reduce or cancel the noise and distortion components in the signal.
    • 光调制器或激光源具有用于检测其输出信号并产生相应的输出信号的检测器。 连接分接装置以分接输入调制信号的一部分作为参考信号。 通过减法单元将参考信号从检测器输出信号进行比较和减去,以产生与激光噪声/失真分量成比例的误差输出信号。 该误差信号被放大并连接到与激光光输出连接的外部调制器,并通过误差信号强度调制激光输出信号,以便减少或消除信号中的噪声和失真分量。
    • 9. 发明授权
    • Fiber optic combiner/splitter
    • 光纤组合器/分路器
    • US5113244A
    • 1992-05-12
    • US651635
    • 1991-02-06
    • Mark E. Curran
    • Mark E. Curran
    • G02B6/28H04B10/2581
    • H04B10/2581G02B6/2848
    • The fiber optic combiner/splitter is a positive and negative axicon combination which can convert a ring-shaped beam into a solid beam. The positive half of the axicon is effectively a plano-convex lens where the convex surface is generally a shallow cone. The flat surface of the lens abuts each end of an array of single mode fibers which are arranged in a ring configuration around a support member. The negative half of the axicon is effectively a plano-concave lens which is complementary to the positive lens. The focused beams from the positive half of the axicon are combined to form a single beam which is then directed into a single optical fiber. For conversions in the reverse direction, light is taken from a single multimode fiber and expanded into a ring-like pattern. The ring of light is picked up by the ring of single mode fibers. Each single mode fiber receives an equal amount of optical energy or power to provide good efficiency in splitting of the multiplexed beam.
    • 光纤组合器/分路器是一个正负的轴锥组合,可将环形梁转换为实心光束。 旋转三棱镜的正半部实际上是平凸透镜,其中凸表面通常是浅锥体。 透镜的平坦表面邻接围绕支撑构件布置成环形结构的单模光纤阵列的每一端。 正面透镜的负半部实际上是与正透镜互补的平凹透镜。 将聚焦光束从正面半轴组合起来形成单个光束,然后将其导入单个光纤。 对于相反方向的转换,从单个多模光纤采集光并扩展成环状图案。 光环由单模光纤环拾取。 每个单模光纤接收等量的光能或功率,以便在多路复用光束的分割中提供良好的效率。