公开(公告)号：US4838630A

公开(公告)日：1989-06-13

申请号：US135706

申请日：1987-12-21

申请人： Tomasz P. Jannson ,  Joanna L. Jannson ,  Peter C. Yeung

发明人： Tomasz P. Jannson ,  Joanna L. Jannson ,  Peter C. Yeung

IPC分类号： G02B6/34 ,  G02B5/32 ,  G02B6/00 ,  G02B6/43

CPC分类号： G02B5/32 ,  G02B6/43

摘要： An optical interconnect employing planar volume Bragg hologram technology in two dimensions comprises a dichromated gelatin planar volume Bragg hologram disposed in a glass planar optical path. Multiplexed Bragg plane sets selectively diffract information-bearing light signals such as voice, image, or computer data signals in a VLSI system from a laser diode or LED source coupled to the planar optical path toward high-speed photodiodes. The holographic planar optical interconnect can interconnect up to 1000 different signals between VLSI microelectronic components and systems.

公开(公告)号：US4926412A

公开(公告)日：1990-05-15

申请号：US158396

申请日：1988-02-22

申请人： Tomasz P. Jannson ,  Joanna L. Jannson ,  Peter C. Yeung

发明人： Tomasz P. Jannson ,  Joanna L. Jannson ,  Peter C. Yeung

IPC分类号： G02B6/34

CPC分类号： G02B6/2938 ,  G02B6/29308 ,  G02B6/2931 ,  G02B6/29311

摘要： A wavelength division multiplexer/demultiplexer having optical path lengths between a fiber array and a Fourier transform lens, and between a dispersion grating and the lens equal to the focal length of the lens. The optical path lengths reduce losses due to angular acceptance mismatch in the multiplexer. Close orientation of the fiber array about the optical axis and the use of a holographic dispersion grating reduces other losses in the system. Multi-exposure holographic dispersion gratings enable the multiplexer/demultiplexer for extremely broad-band simultaneous transmission and reflection operation. Individual Bragg plane sets recorded in the grating are dedicated to and operate efficiently on discrete wavelength ranges.

摘要翻译： 具有在光纤阵列和傅立叶变换透镜之间以及色散光栅和透镜之间的光路长度等于透镜焦距的波分复用器/解复用器。 光路长度由于多路复用器中的角度接受失配而减少损耗。 围绕光轴的光纤阵列的关闭取向和全息色散光栅的使用减少了系统中的其它损耗。 多曝光全息色散光栅使多路复用器/解复用器能够进行极宽带同时传输和反射操作。 记录在光栅中的单个布拉格平面集专用于有效的离散波长范围。

公开(公告)号：US4767164A

公开(公告)日：1988-08-30

申请号：US16463

申请日：1987-02-18

申请人： Peter C. Yeung

发明人： Peter C. Yeung

IPC分类号： B60T8/171 ,  G01P3/486 ,  G01P21/02 ,  B60T8/32 ,  G01D5/34 ,  H01J40/14

CPC分类号： B60T8/171 ,  G01P21/02 ,  G01P3/486

摘要： A reflective optical wheel speed transducer system is disclosed. The system utilizes a single optical fiber to transmit light to a pair of interrupter discs, and to collect light reflected from the discs. One of the interrupter discs is stationary, and one is rotated at an angular velocity proportional to the rotational speed of a wheel. Both discs are provided with alternating, regularly spaced reflecting and transmissible areas. The reflecting areas of the stationary disc reflect a constant bias level of light to the optical fiber. The reflecting areas of the rotatable disc modulate light passing through the transmissible areas of the stationary disc at a rate proportional to the angular velocity of the wheel. Thus, the interrupter discs generate a modulated light signal that rides on top of the fixed bias signal. Decoding circuitry is provided to convert the modulated component of the light signal to an electrical signal that represents the rotational speed of the wheel. Circuitry is also provided to detect the absence of the fixed bias component of the light signal to monitor the continuity and integrity of the system. A graded index lens is provided at the optical fiber interface and an integral lens/optical fiber connector assembly is provided to minimize light losses in the system.

摘要翻译： 公开了一种反射式光轮速度传感器系统。 该系统利用单个光纤将光传送到一对中断盘，并收集从光盘反射的光。 一个断路盘是静止的，一个以与车轮旋转速度成比例的角速度旋转。 两个盘都具有交替的，规则间隔的反射和可传播区域。 固定光盘的反射区域反射光线对光纤的恒定偏置电平。 可旋转盘的反射区域以与车轮的角速度成比例的速率调制通过固定盘的透射区域的光。 因此，断续盘产生了在固定偏置信号之上乘坐的调制光信号。 提供解码电路以将光信号的调制分量转换为表示车轮旋转速度的电信号。 还提供电路以检测光信号的固定偏置分量的不存在，以监视系统的连续性和完整性。 在光纤接口处设置渐变折射率透镜，并且提供整体透镜/光纤连接器组件以最小化系统中的光损失。