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170 条记录 (耗时 0.038 秒)

    Passivation and protection of a semiconductor surface
    22.
    发明授权
    Passivation and protection of a semiconductor surface 失效
    半导体表面的钝化和保护

    公开(公告)号：US5799028A

    公开(公告)日：1998-08-25

    申请号：US683495

    申请日：1996-07-18

    申请人： Randall S. Geels ,  Julian S. Osinski ,  David F. Welch ,  Donald R. Scifres

    发明人： Randall S. Geels ,  Julian S. Osinski ,  David F. Welch ,  Donald R. Scifres

    IPC分类号： H01L33/44 ,  H01S5/028 ,  H01S3/19

    CPC分类号： H01L33/44 ,  H01S5/028 ,  H01S5/0281 ,  H01S5/0282

    摘要： A surface of a compound III-V semiconductor device is passivated and protected, respectively, by treatment with a sulfur-containing or selenium-containing passivation film on the surface followed by the deposit of a GaN, GaP, InGaP, GaAsP, ZnS or ZnSe protection layer. Prior to passivation and deposition of the protective layer, previously formed contact metalizations may be protected with a liftoff film or layer. A low temperature MOCVD process is used to deposit the protection layer so that the integrity of the previously deposited contact metalization is maintained. The preferred range for MOCVD deposition of the protection layer is in the range of about 300.degree. C. to about 450.degree. C. This processing temperature range is within a temperature range where stable contact metalization exists.

    摘要翻译： 化合物III-V半导体器件的表面分别被钝化和保护，通过用表面上的含硫或含硒钝化膜处理，然后沉积GaN，GaP，InGaP，GaAsP，ZnS或ZnSe 保护层。 在钝化和沉积保护层之前，预先形成的接触金属化可以用剥离膜或层保护。 使用低温MOCVD工艺沉积保护层，以保持先前沉积的接触金属化的完整性。 保护层的MOCVD沉积的优选范围在约300℃至约450℃的范围内。该处理温度范围在存在稳定的接触金属化的温度范围内。

    Upconversion fiber laser
    24.
    发明授权
    Upconversion fiber laser 失效
    上变频光纤激光器

    公开(公告)号：US5677920A

    公开(公告)日：1997-10-14

    申请号：US572029

    申请日：1995-12-14

    申请人： Robert G. Waarts ,  David F. Welch ,  Steven Sanders ,  Donald R. Scifres

    发明人： Robert G. Waarts ,  David F. Welch ,  Steven Sanders ,  Donald R. Scifres

    IPC分类号： G02B6/036 ,  G02B6/42 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S5/10 ,  H01S5/40 ,  H01S3/30

    CPC分类号： G02B6/03638 ,  G02B6/03605 ,  G02B6/03633 ,  H01S3/06708 ,  H01S3/094003 ,  C03B2201/82 ,  C03B2203/12 ,  C03B2203/32 ,  G02B6/4204 ,  H01S3/06729 ,  H01S3/0675 ,  H01S3/094069 ,  H01S3/094092 ,  H01S3/0941 ,  H01S5/1064 ,  H01S5/4025

    摘要： An upconversion fiber laser uses a pump source which may be another fiber laser, such as a high power, diode-laser-pumped, fiber laser. The upconversion fiber laser includes an optical fiber whose core region is doped with an active lasing ionic species capable when optically pumped of undergoing upconversion excitation, such as certain rare earth ionic species, and which is embedded in a cladding of the optical fiber. Use of a fiber pump laser can improve coupling of pump light into the optical fiber, thereby achieving higher pump intensities in the core region and improved upconversion efficiency. The upconversion fiber laser's resonant laser cavity is defined by feedback means which can include at least one reflective grating formed in the optical fiber, as well as a reflective end face of the optical fiber. Any portion of the optical fiber that lies outside of the resonant laser cavity, such as any portion beyond the integral reflective grating, may act as an optical power amplifier for the upconverted laser output. The disclosure includes other embodiments in which pump brightness can be further increased with multiple pump sources.

    摘要翻译： 上转换光纤激光器使用可以是另一种光纤激光器的泵浦源，例如高功率，二极管激光泵浦的光纤激光器。 上转换光纤激光器包括光纤，其核心区域掺杂有当被泵浦经历上转换激发的活性激光离子物质，例如某些稀土离子物质，并且嵌入在光纤的包层中。 使用纤维泵浦激光器可以改善泵浦光与光纤的耦合，从而在芯区域实现更高的泵浦强度，并提高上转换效率。 上变频光纤激光器的谐振激光腔由反射装置限定，该反馈装置可以包括形成在光纤中的至少一个反射光栅以及光纤的反射端面。 位于谐振激光腔外部的光纤的任何部分，例如整个反射光栅之外的任何部分，都可以作为上变频激光输出的光功率放大器。 本公开包括其中可以使用多个泵浦源进一步增加泵亮度的其他实施例。

    Frequency converted laser diode and lens system therefor
    26.
    发明授权
    Frequency converted laser diode and lens system therefor 失效
    变频激光二极管及其透镜系统

    公开(公告)号：US5321718A

    公开(公告)日：1994-06-14

    申请号：US10279

    申请日：1993-01-28

    申请人： Robert G. Waarts ,  David F. Welch ,  Donald R. Scifres ,  Robert J. Lang ,  Derek W. Nam

    发明人： Robert G. Waarts ,  David F. Welch ,  Donald R. Scifres ,  Robert J. Lang ,  Derek W. Nam

    IPC分类号： G02F1/37 ,  H01S3/00 ,  H01S5/00 ,  H01S5/026 ,  H01S5/0625 ,  H01S5/10 ,  H01S5/12 ,  H01S5/14 ,  H01S5/187 ,  H01S5/40 ,  H01S5/50 ,  H01S3/08 ,  H01S3/10

    CPC分类号： H01S5/50 ,  G02F1/37 ,  H01S5/0265 ,  H01S5/005 ,  H01S5/0092 ,  H01S5/026 ,  H01S5/06256 ,  H01S5/1064 ,  H01S5/1215 ,  H01S5/141 ,  H01S5/187 ,  H01S5/4025 ,  H01S5/4031 ,  H01S5/4068 ,  H01S5/4087

    摘要： A compact semiconductor laser light source providing short wavelength (ultraviolet, blue or green) coherent light by means of frequency doubling of red or infrared light from a high power diode heterostructure. The high power diode heterostructure is a MOPA device having a single mode laser oscillator followed by a multimode, preferably flared, optical power amplifier. A tunable configuration having an external rear reflector grating could also be used. A lens could be integrated with the MOPA to laterally collimate the light before it is emitted. Straight or curved, surface emitting gratings could also be incorporated. An astigmatism-correcting lens system having at least one cylindrical lens surface is disposed in the path of the output from the MOPA to provide a beam with substantially equal lateral and transverse beam width dimensions and beam divergence angles. A nonlinear optical crystal or waveguide is placed in the path of the astigmatism-free symmetrized beam to double the frequency of the light. Single pass or multipass configurations with reflectors could be used, as well as external resonator and segmented, periodically poled waveguide configurations.

    摘要翻译： 一种紧凑的半导体激光光源，通过从高功率二极管异质结构的红色或红外光的倍频提供短波长（紫外线，蓝色或绿色）相干光。 高功率二极管异质结构是具有单模激光振荡器的MOPA器件，其后是多模，优选为扩展的光功率放大器。 也可以使用具有外部后反射器光栅的可调构造。 透镜可以与MOPA集成，以在发射光之前对光进行横向准直。 还可以结合直的或弯曲的表面发射光栅。 具有至少一个柱面透镜表面的散光校正透镜系统设置在来自MOPA的输出的路径中，以提供具有基本相等的横向和横向波束宽度尺寸和光束发散角的光束。 将非线性光学晶体或波导放置在无散光对称光束的路径中，将光的频率加倍。 可以使用具有反射器的单通或多通道配置，以及外部谐振器和分段的周期性极化波导配置。

    NxN Optical crossbar switch matrix
    27.
    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 ring and folded cavity lasers
    28.
    发明授权
    Semiconductor ring and folded cavity lasers 失效
    半导体环和折叠腔激光器

    公开(公告)号：US5231642A

    公开(公告)日：1993-07-27

    申请号：US880681

    申请日：1992-05-08

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

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

    IPC分类号： H01S5/026 ,  H01S5/028 ,  H01S5/10 ,  H01S5/125 ,  H01S5/187 ,  H01S5/20 ,  H01S5/40 ,  H01S5/42 ,  H01S5/50

    CPC分类号： H01S5/1032 ,  H01S5/1071 ,  H01S5/20 ,  H01S5/423 ,  H01S5/026 ,  H01S5/028 ,  H01S5/1243 ,  H01S5/125 ,  H01S5/187 ,  H01S5/2036 ,  H01S5/4075 ,  H01S5/42 ,  H01S5/50

    摘要： A semiconductor laser that includes at least one grating reflector with a grating period selected to diffract at a nonperpendicular angle within the plane of the laser waveguide. This allows dispersal of laser light, eliminating filamentary multimode operation of broad area lasers. In one embodiment, the grating reflector couples light between a single transverse mode waveguide portion of the optical cavity and a second, broad area, portion that is not collinear with the single mode waveguide. In another embodiment, the cavity favors a ring mode of oscillation. One or more grating reflectors form part of the feedback mechanism which forms a resonant optical cavity with noncollinear portions. Other reflectors in the feedback mechanism include facet reflectors which can be cleaved or ion milled, or semiconductor material refractive index boundaries. Laser embodiments with two or more grating reflectors can be independently tuned to provide a high rate of amplitude modulation. Spatial beam deflection and wavelength tuning are also achieved. A stable unidirectional ring laser is also described. Multiple ring laser cavities can also be coupled together by partially reflecting grating reflectors to form a laser array.

    摘要翻译： 一种半导体激光器，其包括至少一个具有光栅周期的光栅反射器，所述光栅反射器被选择为在激光波导的平面内以非垂直角衍射。 这允许分散激光，消除广域激光器的丝状多模操作。 在一个实施例中，光栅反射器将光耦合在光腔的单个横模式波导部分与不与单模波导共线的第二宽区域部分之间耦合。 在另一个实施例中，空腔有利于环形振荡模式。 一个或多个光栅反射器形成反馈机构的一部分，其形成具有非共线部分的谐振光腔。 反馈机构中的其他反射器包括可以被切割或离子研磨的面反射器，或半导体材料的折射率边界。 具有两个或更多个光栅反射器的激光器实施例可以被独立地调谐以提供高的幅度调制率。 还实现了空间光束偏转和波长调谐。 还描述了稳定的单向环形激光器。 多环激光腔也可以通过部分反射光栅反射器耦合在一起形成激光阵列。

    Semiconductor laser with integral spatial mode filter
    29.
    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。