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    Upgradable, gain flattened fiber amplifiers for WDM applications
    1.
    发明授权
    Upgradable, gain flattened fiber amplifiers for WDM applications 有权
    可升级，增益为WDM应用的扁平化光纤放大器

    公开(公告)号：US06388806B1

    公开(公告)日：2002-05-14

    申请号：US09797043

    申请日：2001-02-28

    申请人： Paul N. Freeman ,  Stephen G. Grubb ,  Daniel A. Ratoff ,  David G. Mehuys

    发明人： Paul N. Freeman ,  Stephen G. Grubb ,  Daniel A. Ratoff ,  David G. Mehuys

    IPC分类号： H01S300

    CPC分类号： H04B10/2941 ,  H01S3/094003 ,  H01S2301/04 ,  H04B10/2912 ,  H04B2210/003 ,  H04J14/0221

    摘要： A multistage optical fiber amplifier (OFA) system is designed to be upgraded with the addition of pump power when signal capacity of an optical communication link is correspondingly increased. The system includes a gain flattening filter (GFF) that remains valid when the system is upgraded because of the system design. Also disclosed are ways to enhance the GFF as well as control the channel signal gain tilt as well as adjust the external gain uniformity to be the same for an assembly line of OFA systems.

    摘要翻译： 当光通信链路的信号容量相应增加时，多级光纤放大器（OFA）系统被设计为随着泵浦功率的增加而升级。 该系统包括一个增益平坦化滤波器（GFF），当系统由于系统设计升级而保持有效。 还公开了增强GFF以及控制信道增益倾斜以及将OFA系统的组装线的外部增益均匀性调整为相同的方法。

    External cavity, continuously tunable wavelength source
    2.
    发明授权
    External cavity, continuously tunable wavelength source 失效
    外腔，连续可调波长源

    公开(公告)号：US6049554A

    公开(公告)日：2000-04-11

    申请号：US984485

    申请日：1997-12-01

    申请人： Robert J. Lang ,  David G. Mehuys ,  David F. Welch

    发明人： Robert J. Lang ,  David G. Mehuys ,  David F. Welch

    IPC分类号： H01S3/067 ,  H01S3/081 ,  H01S3/105 ,  H01S3/23 ,  H01S5/14 ,  H01S3/086

    CPC分类号： H01S5/141 ,  H01S3/06754 ,  H01S3/2308 ,  H01S5/0064 ,  H01S5/143

    摘要： An external cavity, continuously tunable wavelength source comprising a coherent light source having an external cavity including a reflector, such as a mirror or right-angle prism, for reflecting a selected wavelength from a diffraction grating back into the coherent light source. The wavelength is selected by simultaneous rotation and linear translation of the reflector about a pivot point such that the optical path length of the external cavity is substantially identical to a numerical integer of half wavelengths at a plurality of tunable wavelengths about a central wavelength of a tunable bandwidth for the source such that cavity phase error is zero at the central wavelength and is maximally flat on either side of the center wavelength within the tunable bandwidth. The location of said pivot axis is chosen to set the cavity phase error equal to zero and its first and second derivatives substantially equal to zero at exactly one wavelength. The external cavity may be either a Littman optical cavity configuration or a Littrow external cavity configuration. The output of the coherent light source is optically coupled to a gain element for amplification.

    摘要翻译： 包括相干光源的外部腔，连续可调波长源，其具有包括诸如反射镜或直角棱镜的反射器的外部空腔，用于将所选择的波长从衍射光栅反射回相干光源。 通过围绕枢转点的反射器的同时旋转和线性平移来选择波长，使得外部空腔的光路长度基本上与可调谐的中心波长的多个可调波长处的半波长的数值整数相同 带宽，使得中心波长处的腔相位误差为零，并且在可调谐带宽内的中心波长的任一侧上最大为平坦。 选择所述枢转轴线的位置以将空腔相位误差设定为零，其第一和第二导数在正好一个波长处基本上等于零。 外腔可以是Littman光腔配置或Littrow外腔配置。 相干光源的输出光耦合到用于放大的增益元件。

    External cavity, continuously tunable wavelength source
    4.
    发明授权
    External cavity, continuously tunable wavelength source 失效
    外腔，连续可调波长源

    公开(公告)号：US5771252A

    公开(公告)日：1998-06-23

    申请号：US592906

    申请日：1996-01-29

    申请人： Robert J. Lang ,  David G. Mehuys ,  David F. Welch

    发明人： Robert J. Lang ,  David G. Mehuys ,  David F. Welch

    IPC分类号： H01S3/067 ,  H01S3/081 ,  H01S3/105 ,  H01S3/23 ,  H01S5/14 ,  H01S3/10 ,  H01S3/08

    CPC分类号： H01S5/141 ,  H01S3/06754 ,  H01S3/2308 ,  H01S5/0064 ,  H01S5/143

    摘要： An external cavity, continuously tunable wavelength source comprising a coherent light source having an external cavity including a reflector, such as a mirror or right-angle prism, for reflecting a selected wavelength from a diffraction grating back into the coherent light source. The wavelength is selected by simultaneous rotation and translational movement of the reflector about a pivot point such that the optical path length of the external cavity is substantially identical to a numerical integer of half wavelengths at a plurality of tunable wavelengths about a central wavelength of a tunable bandwidth for the source such that cavity phase error is zero at the central wavelength and is maximally flat on either side of the center wavelength within the tunable bandwidth. The location of said pivot axis is chosen to set the cavity phase error equal to zero and its first and second derivatives substantially equal to zero at exactly one wavelength. The external cavity may be either a Littman optical cavity configuration or a Littrow external cavity configuration. The output of the coherent light source is optically coupled to a gain element for amplification.

    摘要翻译： 包括相干光源的外部腔，连续可调波长源，其具有包括诸如反射镜或直角棱镜的反射器的外部空腔，用于将所选择的波长从衍射光栅反射回相干光源。 通过反射器围绕枢转点的同时旋转和平移运动来选择波长，使得外腔的光路长度基本上与可调谐的中心波长的多个可调谐波长处的半波长的数值整数相同 带宽，使得中心波长处的腔相位误差为零，并且在可调谐带宽内的中心波长的任一侧上最大为平坦。 选择所述枢转轴线的位置以将空腔相位误差设定为零，其第一和第二导数在正好一个波长处基本上等于零。 外腔可以是Littman光腔配置或Littrow外腔配置。 相干光源的输出光耦合到用于放大的增益元件。

    NxN Optical crossbar switch matrix
    6.
    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。

    Upgradable, gain flattened fiber amplifiers for WDM applications
    7.
    发明授权
    Upgradable, gain flattened fiber amplifiers for WDM applications 有权
    可升级，增益为WDM应用的扁平化光纤放大器

    公开(公告)号：US06236498B1

    公开(公告)日：2001-05-22

    申请号：US09252713

    申请日：1999-02-19

    申请人： Paul N. Freeman ,  Stephen G. Grubb ,  Daniel A. Ratoff ,  David G. Mehuys

    发明人： Paul N. Freeman ,  Stephen G. Grubb ,  Daniel A. Ratoff ,  David G. Mehuys

    IPC分类号： H01S300

    CPC分类号： H04B10/2941 ,  H01S3/094003 ,  H01S2301/04 ,  H04B10/2912 ,  H04B2210/003 ,  H04J14/0221

    摘要： A multistage optical fiber amplifier (OFA) system is designed to be upgraded with the addition of pump power when signal capacity of an optical communication link is correspondingly increased. The system includes a gain flattening filter (GFF) that remains valid when the system is upgraded because of the system design. Also disclosed are ways to enhance the GFF as well as control the channel signal gain tilt as well as adjust the external gain uniformity to be the same for an assembly line of OFA systems.

    摘要翻译： 当光通信链路的信号容量相应增加时，多级光纤放大器（OFA）系统被设计为随着泵浦功率的增加而升级。 该系统包括一个增益平坦化滤波器（GFF），当系统由于系统设计升级而保持有效。 还公开了增强GFF以及控制信道增益倾斜以及将OFA系统的组装线的外部增益均匀性调整为相同的方法。