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    • 6. 发明申请
    • LONG WAVELENGTH VCSEL WITH TUNNEL JUNCTION AND IMPLANT
    • 长波长VCSEL与隧道连接和植入
    • WO2004049528A2
    • 2004-06-10
    • PCT/US2003/040047
    • 2003-11-20
    • HONEYWELL INTERNATIONAL INC.
    • JOHNSON, Ralph, H.WANG, Tzu-Yu
    • H01S5/183
    • H01S5/18308H01S5/0425H01S5/18311H01S5/18316H01S5/1833H01S5/18369H01S5/18377H01S5/2063H01S5/3095
    • A vertical cavity having a tunnel junction surface emitting laser (VCSEL) for emitting long wavelength light (i.e., 1200 to 1800 nanometers, though it is contemplated that the structures and techniques are applicable to other wavelength VCSELs). The tunnel junction may be isolated with an implant down into the top mirror through the tunnel junction and p-layer and a trench around the VCSEL down to at least past the tunnel junction. The trench may result in reduced capacitance and D.C. isolation of the tunnel junction. The implant is performed after the trench is made. Some of the implant may enter the bottom of the trench into the bottom mirror for some further isolation for the tunnel junction of the VCSEL. Further isolation and some current confinement may be provided with lateral oxidation of a layer below the tunnel junction. Internal trenches may be made from the top of the VCSEL vertically down to the oxidizable layer below the tunneljunction. Oxidation of that layer via these trenches may provide further isolation of the tunnel junction. Also, a bonding pad connected to a contact on the VCSEL with a bridge may have an open trench about their periphery for their isolation. Internal trenches may be placed on the pad and its bridge that go down vertically to the oxidizable layer. Oxidation via these trenches may provide further isolation for the pad and bridge if the latter is present.
    • 具有用于发射长波长光的隧道结表面发射激光器(VCSEL)的垂直腔(即1200至1800纳米,尽管预期该结构和技术可应用于其它波长VCSEL)。 隧道结可以通过隧道结和p层以及VCSEL周围的沟槽沿着至少穿过隧道结的方式与植入物隔离成上反射镜。 沟道可能会导致隧道结的电容和直流隔离。 在制造沟槽之后执行注入。 一些植入物可以进入沟槽的底部进入底部反射镜,以进一步隔离VCSEL的隧道结。 可以在隧道结下方的层的侧向氧化提供进一步隔离和一些电流限制。 内部沟槽可以从VCSEL的顶部垂直向下到达隧道结下方的可氧化层。 通过这些沟槽氧化该层可以进一步隔离隧道结。 此外,连接到具有桥接器的VCSEL上的接触件的接合焊盘可以围绕其外围具有敞开的沟槽用于隔离。 内部沟槽可以放置在垂直于可氧化层的衬垫及其桥上。 通过这些沟槽的氧化可以为衬垫和桥梁提供进一步隔离,如果后者存在的话。
    • 7. 发明申请
    • SINGLE MODE VCSEL
    • 单模VCSEL
    • WO2004036707A2
    • 2004-04-29
    • PCT/US2003/027685
    • 2003-09-02
    • HONEYWELL INTERNATIONAL INC.
    • TATUM, James, A.JOHNSON, Ralph, H.GUENTER, James, K.
    • H01S5/00
    • H01S5/18341H01S5/005H01S5/0207H01S5/18305H01S5/1833H01S5/18369H01S2301/166
    • A VCSEL having a metallic heat spreading layer adjacent a semiconductor buffer layer containing an insulating structure. The heat spreading layer includes an opening that enables light emitted by an active region to reflect from a distributed Bragg reflector (DBR) top mirror located above the heat spreading layer. A substrate is below the active region. A lower contact provides electrical current to that substrate. The lower contact includes an opening that enables light emitted from the active region to reflect from a distributed Bragg reflector (DBR) lower mirror. Beneficially, the substrate includes a slot that enables light to pass through an opening in the lower contact. That slot acts as an alignment structure that enables optical alignment of an external feature to the VCSEL.
    • 具有金属散热层的VCSEL,该金属热扩散层与包含绝缘结构的半导体缓冲层相邻。 散热层包括使有源区域发射的光能够从位于散热层上方的分布式布拉格反射镜(DBR)上反射镜反射的开口。 底物低于活性区。 较低的触点为该基片提供电流。 下部接触件包括使从有源区域发射的光能够从分布式布拉格反射镜(DBR)下反射镜的开口。 有利地,衬底包括使光能够穿过下接触件中的开口的狭槽。 该槽作为对准结构,使外部特征能够与VCSEL进行光学对准。
    • 10. 发明申请
    • CURRENT-APERTURED VERTICAL-CAVITY LASER
    • 当前无损的垂直激光
    • WO1997001879A1
    • 1997-01-16
    • PCT/US1996010610
    • 1996-06-19
    • OPTICAL CONCEPTS, INC.
    • OPTICAL CONCEPTS, INC.SCOTT, Jeffrey, W.
    • H01S03/085
    • H01S5/18333H01S5/18311H01S5/18316H01S5/1833H01S5/18358H01S2301/166
    • A vertical-cavity surface-emitting laser (VCSEL) has an active region (20), first and second mirror stacks (14, 26) forming a resonant cavity with a radial variation in index forming a transverse optical mode (32), and a thin insulating slot (27) within the cavity to constrict the current to a diameter less than the beam waist of the optical mode thereby improving device efficiency and preferentially supporting single mode operation. In one embodiment, an insulating slot is formed by etching or selectively oxidizing a thin aluminium-containing semiconductor layer in towards the center of a cylindrical mesa. The slot thickness is sufficiently thin that the large index discontinuity has little effect on the transverse optical-mode pattern. The slot may be placed near an axial standing-wave null to minimize the perturbation of the index discontinuity and allow the use of thicker slots. In a preferred embodiment, the current constriction, formed by the insulating slot, is located on the p-type side of the active region and has a diameter significantly less than the beam waist of the optical mode, thus minimizing outward diffusion of carriers and ensuring single transverse-mode operation of the laser by suppressing spatial hole burning.
    • 垂直腔表面发射激光器(VCSEL)具有有源区域(20),形成谐振腔的第一和第二反射镜叠层(14,26)具有形成横向光学模式(32)的折射率的径向变化,并且 在空腔内的薄绝缘槽(27)将电流收缩到小于光学模式的光束腰部的直径,从而提高器件效率并优先支持单模操作。 在一个实施例中,通过蚀刻或选择性地将薄的含铝半导体层朝向圆柱形台面的中心形成绝缘槽。 狭缝厚度足够薄,使得大的折射率不连续性对横向光学模式图案几乎没有影响。 槽可以放置在轴向驻波零点附近,以最小化指数不连续性的扰动,并允许使用较厚的槽。 在优选实施例中,由绝缘槽形成的电流收缩部位于有源区域的p型侧,并且具有明显小于光学模式的光束腰部的直径,从而最小化载体的向外扩散并确保 通过抑制空穴燃烧,激光的单横模操作。