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    NxN Optical crossbar switch matrix
    3.
    发明授权
    NxN Optical crossbar switch matrix 失效
    NxN光交叉开关矩阵

    公开(公告)号：US5255332A

    公开(公告)日：1993-10-19

    申请号：US915918

    申请日：1992-07-16

    申请人： David F. Welch ,  Donald R. Scifres ,  Robert G. Waarts ,  Amos A. Hardy ,  David G. Mehuys ,  Stephen O'Brien

    发明人： David F. Welch ,  Donald R. Scifres ,  Robert G. Waarts ,  Amos A. Hardy ,  David G. Mehuys ,  Stephen O'Brien

    IPC分类号： G02B6/28 ,  G02F1/017 ,  G02F1/313 ,  H04Q3/52 ,  H04Q11/00 ,  G02B6/36

    CPC分类号： B82Y20/00 ,  G02B6/2804 ,  G02B6/2848 ,  G02F1/313 ,  G02F1/017 ,  G02F2201/305

    摘要： An optical crossbar switch matrix for use in switching optical signals from a first set of optical fibers to a second set of optical fibers, in any order, which is characterized by having a matrix of rows and columns of diffraction gratings formed in a semiconductor heterostructure. Each grating is independently biased with either a forward or reverse bias voltage to switch the grating between a reflective state and a transmissive state. The gratings are oriented at an angle relative to the rows and columns so that when the Bragg condition for the light received from an optical film is met, a portion of the light is diffracted from the row in which it is propagating into a column toward another optical fiber. The heterostructure may include optical amplifiers to restore the optical signal to its original power level. Beam expanding, collimating and focussing optics may also be integrated into the heterostructure.

    摘要翻译： 一种用于将光信号从第一组光纤切换到第二组光纤的光学交叉开关矩阵，其特征在于具有在半导体异质结构中形成的行和列的衍射光栅的矩阵。 每个光栅被独立地偏置有正向或反向偏置电压，以在反射状态和透射状态之间切换光栅。 光栅相对于行和列以一定角度取向，使得当满足从光学膜接收的光的布拉格条件时，光的一部分从其正在传播到列的行衍射成另一个 光纤。 异质结构可以包括将光信号恢复到其原始功率电平的光放大器。 光束扩展，准直和聚焦光学器件也可以整合到异质结构中。

    Semiconductor laser with integral spatial mode filter
    9.
    再颁专利
    Semiconductor laser with integral spatial mode filter 有权
    具有积分空间模式滤波器的半导体激光器

    公开(公告)号：USRE37354E1

    公开(公告)日：2001-09-04

    申请号：US09418905

    申请日：1999-10-15

    申请人： David F. Welch ,  David G. Mehuys ,  Donald R. Scifres

    发明人： David F. Welch ,  David G. Mehuys ,  Donald R. Scifres

    IPC分类号： H01S319

    CPC分类号： H01S5/1014 ,  G02B6/12004 ,  G02B6/305 ,  H01S3/0818 ,  H01S3/113 ,  H01S5/026 ,  H01S5/0286 ,  H01S5/0425 ,  H01S5/0625 ,  H01S5/06256 ,  H01S5/065 ,  H01S5/0655 ,  H01S5/10 ,  H01S5/1003 ,  H01S5/1064 ,  H01S5/1082 ,  H01S5/1085 ,  H01S5/1215 ,  H01S5/125 ,  H01S5/14 ,  H01S5/141 ,  H01S5/146 ,  H01S5/18 ,  H01S5/187 ,  H01S5/20 ,  H01S5/2036 ,  H01S5/2063 ,  H01S5/4025 ,  H01S5/4062 ,  H01S5/4087 ,  H01S5/50 ,  H01S2301/166

    摘要： A semiconductor laser having a light amplifying diode heterostructure with a flared gain region in an external resonant cavity. The flared gain region has a narrow aperture end which may be coupled to a single mode waveguide and a wide output end. A light emitting surface of the heterostructure proximate to the wide end of the flared gain region is partially reflective and combines with an external reflector to form a resonant cavity that is effectively unstable. The intracavity light-emitting surface proximate to the narrow aperture end is antireflection coated. The external reflector may be a planar mirror or a grating reflector. A lens or an optical fiber may couple the aperture end of the flared gain region to the external reflector. Frequency-selective feedback is provided by orienting the grating reflector or providing a prism in the cavity in front of the external planar mirror. Other filtering elements may also be placed in the external cavity. The flared gain region and waveguide may be differentially pumped or modulated with current provided by separate contacts.

    摘要翻译： 一种具有在外部谐振腔中具有扩张增益区的光放大二极管异质结构的半导体激光器。 扩口增益区域具有窄孔径端，其可以耦合到单模波导和宽输出端。 接近扩张增益区域的宽端的异质结构的发光表面是部分反射的，并且与外部反射器组合以形成有效不稳定的谐振腔。 靠近窄孔径的腔内发光表面是抗反射涂层的。 外部反射器可以是平面镜或光栅反射器。 透镜或光纤可将扩张增益区域的孔径端耦合到外部反射器。 通过定向光栅反射器或在外部平面镜的前面的空腔中提供棱镜来提供频率选择反馈。 其它过滤元件也可以放置在外部空腔中。 扩张增益区域和波导可以通过由单独的触点提供的电流进行差分泵浦或调制。