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    Apparatus and method for providing a single-mode grating-outcoupled surface emitting laser with detuned second-order outcoupler grating
    1.
    发明授权
    Apparatus and method for providing a single-mode grating-outcoupled surface emitting laser with detuned second-order outcoupler grating 失效
    用于提供具有失谐二阶外耦合光栅的单模光栅耦合表面发射激光器的装置和方法

    公开(公告)号：US07313159B2

    公开(公告)日：2007-12-25

    申请号：US11021535

    申请日：2004-12-23

    申请人： Nuditha Vibhavie Amarasinghe ,  Taha Masood ,  Steven Gregory Patterson ,  Gary Alan Evans

    发明人： Nuditha Vibhavie Amarasinghe ,  Taha Masood ,  Steven Gregory Patterson ,  Gary Alan Evans

    IPC分类号： H01S3/08 ,  H01S5/00

    CPC分类号： H01S5/125 ,  H01S5/1221 ,  H01S5/18

    摘要： An improved grating-outcoupled surface-emitting semiconductor laser architecture is provided. A second-order grating is placed between two distributed Bragg reflector gratings. The period of the second order grating is positively or negatively detuned from the distributed Bragg reflector selected optical wavelength at which the laser operates. Detuning of the second-order grating towards shorter or longer wavelengths allows kink-free, linear LI curves light output versus forward current) for grating-outcoupled surface-emitting lasers. Due to the detuning of the outcoupler grating, the outcoupled radiation emits two beams that deviate slightly from the normal axis. A design point may then be chosen where the power outcoupled by symmetric and antisymmetric modes cross and where the outcoupled power is independent of the phase variation.

    摘要翻译： 提供了一种改进的光栅耦合表面发射半导体激光器结构。 二阶光栅放置在两个分布布拉格反射器光栅之间。 第二级光栅的周期与激光器所在的分布式布拉格反射体所选择的光波长正向或负向失谐。 对于光栅输出耦合的表面发射激光器，二阶光栅向更短或更长波长的去抖动允许无扭结的线性LI曲线光输出对正向电流）。 由于外耦合光栅的失谐，输出耦合的辐射发射出两个与正常轴线稍微偏离的光束。 然后可以选择设计点，其中通过对称和反对称模式交叠的功率相交，并且输出耦合功率独立于相位变化。

    Single-wavelength, unequal-length-multi-cavity grating-outcoupled surface emitting laser with staggered tuned distributed Bragg reflectors
    3.
    发明授权
    Single-wavelength, unequal-length-multi-cavity grating-outcoupled surface emitting laser with staggered tuned distributed Bragg reflectors 有权
    具有交错调谐分布布拉格反射器的单波长，不等长多孔光栅耦合表面发射激光器

    公开(公告)号：US06888874B2

    公开(公告)日：2005-05-03

    申请号：US10348920

    申请日：2003-01-22

    申请人： Taha Masood ,  Steven Gregory Patterson ,  Gary A. Evans ,  Nuditha Vibhavie Amarasinghe

    发明人： Taha Masood ,  Steven Gregory Patterson ,  Gary A. Evans ,  Nuditha Vibhavie Amarasinghe

    IPC分类号： H01S3/08 ,  H01S5/00 ,  H01S5/042 ,  H01S5/10 ,  H01S5/12 ,  H01S5/125 ,  H01S5/18

    CPC分类号： H01S5/0425 ,  H01S5/0654 ,  H01S5/1021 ,  H01S5/1039 ,  H01S5/1215 ,  H01S5/125 ,  H01S5/18

    摘要： A laser diode system is provided. The laser comprises first and second reflective gratings at each end of the laser. The laser further comprises an outcoupling grating between the first and second reflective gratings, wherein the outcoupling grating couples light out of the laser. The reflectors and outcoupling grating each have a unique wide-band reflective spectrum. A first laser cavity exists between the first and second reflective gratings. A second laser cavity exists between the first reflective grating and the outcoupling grating. A third laser cavity exists between the second reflective grating and the outcoupling grating, and a fourth laser cavity exists with in the outcoupling region. The overlap of reflective spectra determine the lasing wavelengths that reach resonance within each cavity. Wavelengths resonant in one cavity are suppressed in the others unless a wavelength is resonant in all cavities. This matching of mode intensities causes the outcoupled beam to be confined to a single wavelength.

    摘要翻译： 提供了一种激光二极管系统。 激光器包括在激光器的每一端的第一和第二反射光栅。 激光器还包括在第一和第二反射光栅之间的输出耦合光栅，其中输出耦合光栅将光从激光器耦合。 反射器和外耦合光栅每个都具有独特的宽带反射光谱。 在第一和第二反射光栅之间存在第一激光腔。 在第一反射光栅和外耦合光栅之间存在第二激光腔。 在第二反射光栅和外耦合光栅之间存在第三激光腔，并且在外耦合区域中存在第四激光腔。 反射光谱的重叠决定了在每个腔内达到谐振的激光波长。 在一个空腔中谐振的波长在其他腔中被抑制，除非波长在所有空腔中共振。 模式强度的这种匹配使得输出耦合的光束被限制在单个波长。

    Single mode grating-outcoupled surface emitting laser with broadband and narrow-band DBR reflectors
    4.
    发明授权
    Single mode grating-outcoupled surface emitting laser with broadband and narrow-band DBR reflectors 有权
    单模光栅耦合表面发射激光器，具有宽带和窄带DBR反射器

    公开(公告)号：US06810067B2

    公开(公告)日：2004-10-26

    申请号：US10255443

    申请日：2002-09-26

    申请人： Taha Masood ,  Steven Gregory Patterson ,  Gary A. Evans

    发明人： Taha Masood ,  Steven Gregory Patterson ,  Gary A. Evans

    IPC分类号： H01S308

    CPC分类号： H01S5/187 ,  H01S5/0425 ,  H01S5/06258 ,  H01S5/1203

    摘要： A laser source is provided by the present invention, comprising a laser diode and has an active region with asymmetric distributed Bragg reflectors (DBRs) at either end to reflect light within the cavity, and an outcoupling grating in the center of the device, which couples light out of the cavity. One DBR is long and shallow, with a narrow-band reflective spectrum. The other DBR is short and deep, with a wide-band reflective spectrum. The lasing wavelength is determined by the reflective spectrum overlap of the two DBRs. Since the shallow DBR is highly reflective to only one Fabry Perot wavelength, and the deep DBR is highly reflective to a wide band of Fabry-Perot wavelengths, it is the reflective spectrum of the shallow DBR that determines the lasing wavelength.

    摘要翻译： 本发明提供了一种激光源，它包括一个激光二极管，并具有一个有效区域，在两端都有非对称分布式布拉格反射器（DBR），以反射空腔内的光线，以及耦合在器件中心的输出耦合光栅 光线从腔中射出。 一个DBR长而浅，具有窄带反射光谱。 另一个DBR短而深，具有宽带反射光谱。 激光波长由两个DBR的反射光谱重叠决定。 由于浅的DBR对于仅仅一个法布里珀罗波长是高反射性的，深DBR对于法布里 - 珀罗波长的宽带是高度反射的，所以它是确定激光波长的浅DBR的反射光谱。