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    Laser source with submicron aperture
    1.
    发明授权
    Laser source with submicron aperture 失效
    具有亚微米孔径的激光源

    公开(公告)号：US06445723B1

    公开(公告)日：2002-09-03

    申请号：US09313444

    申请日：1999-05-18

    申请人： Mehrdad Ziari ,  Scott D. DeMars ,  Edward C. Vail ,  Hanmin Zhao

    发明人： Mehrdad Ziari ,  Scott D. DeMars ,  Edward C. Vail ,  Hanmin Zhao

    IPC分类号： H01S522

    CPC分类号： B82Y10/00 ,  G11B7/127 ,  H01S5/0207 ,  H01S5/1014 ,  H01S5/1064 ,  H01S5/164 ,  H01S5/2214 ,  H01S5/2215 ,  H01S5/227 ,  H01S5/3203 ,  H01S5/32341 ,  H01S2301/176 ,  H01S2301/185

    摘要： A buried heterostructure (BH) laser source with a narrow active region is disclosed for use in close proximity with optically-addressed data storage media for read/write functionality in a relatively high data density format. The BH laser source is formed on a pregrooved or prepatterned substrate to form mesas upon which epitaxial layers are formed to form laser source active regions that have small emission apertures at the laser source facet output. Selective removal of semiconductor cladding material and replacement of this material with lower refractive index materials provides a way of obtaining further mode size-reduction at the output facet of the laser source. Each mesa has a top surface and adjacent sidewalls such that in the growth of the epitaxial layers above the active region doped with a first conductivity type, the above active region epitaxial layers depositing on the top surface deposit as a first conductivity type and depositing on said sidewalls deposit as a second conductivity type. This growth construction provides for a naturally formed p-n junction at the laser source active region and eliminates the need to perform a subsequent diffusion process to form such a junction. The optical cavities of the laser sources may be tapered so that die cleaving a predetermined point along the length of the optical cavity will provide the desired emission aperture size at the laser source output facet.

    摘要翻译： 公开了一种具有窄有源区的掩埋异质结构（BH）激光源，用于与光学寻址数据存储介质紧密接近，以便以相对较高的数据密度格式进行读/写功能。 BH激光源形成在预浸渍或预制图案化的衬底上以形成台面，在其上形成外延层以形成在激光源面输出处具有小发射孔径的激光源有源区。 选择性去除半导体包层材料并用较低折射率材料替代该材料提供了在激光源的输出端获得进一步的模式尺寸减小的方式。 每个台面具有顶表面和相邻的侧壁，使得在掺杂有第一导电类型的有源区上方的外延层的生长中，沉积在顶表面上的上述有源区外延层作为第一导电类型沉积并沉积在所述 侧壁沉积为第二导电类型。 该生长结构提供了在激光源有源区域处的自然形成的p-n结，并且不需要进行随后的扩散过程以形成这种结。 激光源的光腔可以是锥形的，使得沿着光腔的长度切割预定点的管芯将在激光源输出端面处提供期望的发射孔径尺寸。

    Depolarizing polarization mode combiner
    2.
    发明授权
    Depolarizing polarization mode combiner 有权
    去极化偏振模式组合器

    公开(公告)号：US06522796B1

    公开(公告)日：2003-02-18

    申请号：US09695713

    申请日：2000-10-24

    申请人： Mehrdad Ziari ,  Edward C. Vail

    发明人： Mehrdad Ziari ,  Edward C. Vail

    IPC分类号： G02B600

    CPC分类号： G02B6/272 ,  G02B6/105 ,  G02B6/2773 ,  G02B6/2786 ,  G02B6/29352 ,  H01S3/094003 ,  H01S3/094096 ,  H01S3/302 ,  H04J14/02 ,  H04J14/06

    摘要： A pump source for a fiber Raman amplifier uses multiple lasers to generate high pump power or to generate a pump beam having a tailored spectrum for producing a desired Raman gain spectral profile. Light from two lasers, in mutually orthogonal polarization states directed to a polarization combiner that produces an output having light mixed at the two orthogonal polarization states. A depolarizer depolarizes the output. The depolarizer defines first and second orthogonal polarization modes oriented so that the light output from the polarization combiner in one polarization state excites the first and second polarization modes of the depolarizer equally and the light output from the polarization combiner in the other polarization state also excites the first and second polarization modes of the depolarizer equally.

    摘要翻译： 用于光纤拉曼放大器的泵浦源使用多个激光器来产生高泵浦功率或产生具有定制光谱的泵浦光束，以产生所需的拉曼增益光谱分布。 来自两个激光器的光，在相互正交的极化状态中，指向偏振组合器，其产生具有在两个正交偏振状态下混合的光的输出。 去极化器使输出极化。 去偏振器限定定向的第一和第二正交偏振模，使得在一个偏振状态下从偏振组合器输出的光均匀地激发去偏振器的第一和第二偏振模，并且来自偏振组合器在另一个偏振态的输出也激发 去极化器的第一和第二偏振模式相等。

    Depolarized semiconductor laser sources
    5.
    发明授权
    Depolarized semiconductor laser sources 有权
    去极化半导体激光源

    公开(公告)号：US06760151B1

    公开(公告)日：2004-07-06

    申请号：US09559936

    申请日：2000-04-27

    申请人： Edward C. Vail ,  Mehrdad Ziari ,  Bernard Fidric ,  Jianping Zhang ,  Stuart MacCormack ,  Vincent E. Dominic

    发明人： Edward C. Vail ,  Mehrdad Ziari ,  Bernard Fidric ,  Jianping Zhang ,  Stuart MacCormack ,  Vincent E. Dominic

    IPC分类号： H01S300

    CPC分类号： H01S5/146 ,  H01S3/005 ,  H01S3/094003 ,  H01S3/094073 ,  H01S3/09415 ,  H01S5/06236 ,  H01S5/065 ,  H01S5/0652 ,  H01S5/0656

    摘要： A semiconductor pump laser uses a depolarzer to depolarize the pump light entering the fiber amplifier. The depolarized light source is useful for reducing polarization dependent gain of fiber amplifiers. The pump laser includes one or more semiconductor, coherence-collapsed laser sources emitting polarized pump outputs, and one or more depolarizers disposed to depolarize the polarized pump output from the lasers. One or more fiber outputs are coupled to the one or more depolarizers to receive depolarized pump light. The depolarizer may include an N×M polarization preserving coupler having N inputs and M outputs, N and M being at least 2, an input to the depolarizer at a first coupler input, an output port from the depolarizer at a first coupler output. A polarization-controlling optical path is coupled between a second coupler output and a second coupler input. A polarization of light exiting the N×M coupler through the second coupler output is substantially orthogonal to a polarization of light entering the N×M coupler through the second coupler input.

    摘要翻译： 半导体泵浦激光器使用去极化器去除进入光纤放大器的泵浦光。 去极化光源对于减少光纤放大器的偏振相关增益是有用的。 泵浦激光器包括一个或多个发射偏振泵浦输出的半导体，相干折叠激光源和一个或多个去偏振器，其被设置为使来自激光器的偏振泵输出去极化。 一个或多个光纤输出耦合到一个或多个去偏振器以接收去极化的泵浦光。 去偏振器可以包括具有N个输入和M个输出，N和M至少为2的N×M偏振保持耦合器，在第一耦合器输入处的去偏振器的输入，来自第一耦合器输出处的去偏振器的输出端口。 偏振控制光路耦合在第二耦合器输出和第二耦合器输入之间。 通过第二耦合器输出离开NxM耦合器的光的极化基本上正交于通过第二耦合器输入进入NxM耦合器的光的偏振。

    Multiple wavelength optical sources
    6.
    发明授权
    Multiple wavelength optical sources 有权
    多波长光源

    公开(公告)号：US06407855B1

    公开(公告)日：2002-06-18

    申请号：US09430394

    申请日：1999-10-29

    申请人： Stuart MacCormack ,  David M. Giltner ,  Vincent G. Dominic ,  Donald R. Scifres ,  Bardia Pezeshki ,  Edward C. Vail ,  Mehrdad Ziari ,  Robert G. Waarts

    发明人： Stuart MacCormack ,  David M. Giltner ,  Vincent G. Dominic ,  Donald R. Scifres ,  Bardia Pezeshki ,  Edward C. Vail ,  Mehrdad Ziari ,  Robert G. Waarts

    IPC分类号： H01S330

    CPC分类号： H01S3/094 ,  H01S3/0675 ,  H01S3/08086 ,  H01S3/0812 ,  H01S3/094042 ,  H01S3/302

    摘要： Optical pumping arrangements are provided for the broadband or multiple wavelength pumping of optical sources. Sources may be based on Raman gain media and may use multiple output couplers to couple out different wavelength ranges. Cascaded Raman resonator (CRR) configurations may also be used. Overlapping resonators at different wavelengths may be configured to share gain media, and may have separate portions in separate optical paths. Attenuation filters may also be used that are matched to the gain profile of a gain medium, to flatten the gain spectrum and allow equalization of gain to different output wavelengths. In one embodiment, polarization maintaining fiber is used to develop resonant conditions at different wavelengths in different polarization states. Wideband output gratings may be substituted for narrowband gratings to provide CRR configurations with a broader output band. Broadband amplification may also be provided by using a laser source operating in coherence collapse. The multiple wavelength pumping lends itself to a pumping arrangement in which sources at different wavelengths are combined into separate transmission/gain media such as the different fibers of an optical fiber cable.

    摘要翻译： 提供了用于光源的宽波长或多波长泵浦的光泵浦装置。 源可以基于拉曼增益介质，并且可以使用多个输出耦合器耦合出不同的波长范围。 也可以使用级联拉曼谐振器（CRR）。 可以将不同波长的重叠谐振器配置成共享增益介质，并且可以在单独的光路中具有分离的部分。 还可以使用与增益介质的增益曲线匹配的衰减滤波器，以平坦化增益谱，并允许将增益均衡到不同的输出波长。 在一个实施例中，使用偏振保持光纤来发展不同偏振态的不同波长的谐振条件。 宽带输出光栅可以代替窄带光栅，以提供具有更宽输出频带的CRR配置。 也可以通过使用在相干塌陷中操作的激光源来提供宽带放大。 多波长泵浦本身适用于泵送装置，其中将不同波长的源组合成单独的传输/增益介质，例如光纤电缆的不同光纤。

    Configurable integrated optical combiners and decombiners
    9.
    发明授权
    Configurable integrated optical combiners and decombiners 有权
    可配置的集成光学组合器和分解器

    公开(公告)号：US07394953B1

    公开(公告)日：2008-07-01

    申请号：US11734259

    申请日：2007-04-11

    申请人： Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Peter W. Evans ,  Jacco L. Pleumeekers ,  Mehrdad Ziari

    发明人： Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Peter W. Evans ,  Jacco L. Pleumeekers ,  Mehrdad Ziari

    IPC分类号： G02B6/34 ,  G02B6/26 ,  G02B6/42

    CPC分类号： G02B6/12033 ,  G02B6/12019

    摘要： System, devices and methods are described that provide an integrated optical decombiner or optical combiner having both unamplified paths and amplified paths on which power monitoring and control may be located. A preferred multiplexing/demultiplexing optical path through the combiner/decombiner and a corresponding waveguide output/input is identified and optically coupled to a piece of fiber. Temperature control may be provided to tune an arrayed waveguide grating within the combiner/decombiner and minimize wavelength drift therein. Integrated power monitoring may be employed on one or more of the amplified waveguide paths to ensure that a preferred power level or range is maintained on an optical signal.

    摘要翻译： 描述了系统，装置和方法，其提供集成光学分解器或光学组合器，其具有可放置功率监视和控制的未放大路径和放大路径。 通过组合器/分解器和对应的波导输出/输入的优选复用/解复用光路被识别并光学耦合到一片光纤。 可以提供温度控制以调谐组合器/分解器内的阵列波导光栅并使其中的波长漂移最小化。 可以在一个或多个放大的波导路径上采用集成功率监视，以确保在光信号上保持优选的功率电平或范围。