Method and apparatus for driving semiconductor lasers, and method and apparatus for deriving drive current patterns for semiconductor lasers
    41.
    发明授权
    Method and apparatus for driving semiconductor lasers, and method and apparatus for deriving drive current patterns for semiconductor lasers 有权
    用于驱动半导体激光器的方法和装置,以及用于导出半导体激光器的驱动电流图案的方法和装置

    公开(公告)号:US07724790B2

    公开(公告)日:2010-05-25

    申请号:US11994396

    申请日:2006-07-03

    申请人: Yuichi Teramura

    发明人: Yuichi Teramura

    IPC分类号: H01S3/13 H01S3/00

    摘要: Semiconductor lasers are driven such that high output laser beams are stably obtained without a long start up time. A method for driving semiconductor lasers by automatic current control or automatic power control with a constant current source involves the steps of: generating a pattern of drive current values for the semiconductor lasers, which is defined according to the amount of time which has elapsed since initiating driving thereof, that enables obtainment of substantially the same light output as a target light output by the automatic current control or the automatic power control; and varying the drive current of the semiconductor lasers in stepwise increments according to the pattern for a predetermined period of time from initiation of drive thereof. A single pattern is used in common to drive the plurality of semiconductor lasers.

    摘要翻译: 驱动半导体激光器,使得在没有长启动时间的情况下稳定地获得高输出激光束。 通过自动电流控制或通过恒定电流源进行的自动功率控制来驱动半导体激光器的方法包括以下步骤:产生半导体激光器的驱动电流值的模式,其根据从启动起经过的时间量来定义 其能够通过自动电流控制或自动电力控制获得与目标光输出大致相同的光输出; 以及根据所述图案逐步增加所述半导体激光器的驱动电流从其驱动开始起预定的一段时间。 共同使用单个图案来驱动多个半导体激光器。

    Laser Diode Array Mounting
    43.
    发明申请
    Laser Diode Array Mounting 审中-公开
    激光二极管阵列安装

    公开(公告)号:US20080063017A1

    公开(公告)日:2008-03-13

    申请号:US11569832

    申请日:2004-10-08

    IPC分类号: H01S5/42 H01S5/024

    摘要: An optically stacked, laser diode array module (10) includes a mounting block (100) having a series of stepped, parallel diode mounting surfaces (101) on one face of the block, each diode mounting surface cooperating with a respective pair of reference surfaces (102, 103) of the block to form a respective outside block corner, a series of laser diodes (300) affixed to the block, with facets of the diode aligned with the reference surfaces forming the outside block corner with the mounting surface on which the diode is disposed, such that a corner of each diode is aligned with a respective corner of the block, and a beam reflector (200) secured to the block and having a series of stepped, parallel surfaces, each positioned to intercept and reflect a respective one of the beams (500) from the laser diodes, such that the reflected beams are parallel and stacked. The beams (500) emitted from the laser diodes (300) can be collimated by microlenses (400).

    摘要翻译: 光学堆叠的激光二极管阵列模块(10)包括在块的一个面上具有一系列阶梯式并联二极管安装表面(101)的安装块(100),每个二极管安装表面与相应的一对参考表面 (102,103),以形成相应的外部块角,固定到所述块的一系列激光二极管(300),所述二极管的小面与参考表面对准,其上形成有外部块角,其上具有安装表面 设置二极管,使得每个二极管的角部与块的相应角对齐,并且束反射器(200)固定到块上并具有一系列阶梯式平行表面,每个平面被定位成截取并反射 来自激光二极管的光束(500)中的相应一个,使得反射光束平行和堆叠。 从激光二极管(300)发射的光束(500)可以由微透镜(400)准直。

    Integration of VCSEL array and microlens for optical scanning
    44.
    发明申请
    Integration of VCSEL array and microlens for optical scanning 审中-公开
    集成VCSEL阵列和微透镜进行光学扫描

    公开(公告)号:US20030091084A1

    公开(公告)日:2003-05-15

    申请号:US09683053

    申请日:2001-11-13

    摘要: A highly compact laser scanner with no moving parts includes a vertical cavity surface emitting laser (VCSEL). A microlens is mounted directly to the light emitting surface of the VCSEL via flip chip bonding. The VCSEL array may be one or two dimensional. The laser array may be used in a variety of applications including free space optical communications.

    摘要翻译: 具有无移动部件的高度紧凑的激光扫描器包括垂直腔表面发射激光器(VCSEL)。 通过倒装芯片接合将微透镜直接安装到VCSEL的发光表面。 VCSEL阵列可以是一维或二维。 激光阵列可以用于各种应用,包括自由空间光通信。

    Semiconductor laser geometry for broad-angle far-field addressing
    45.
    发明授权
    Semiconductor laser geometry for broad-angle far-field addressing 失效
    用于广角远场寻址的半导体激光几何

    公开(公告)号:US5627852A

    公开(公告)日:1997-05-06

    申请号:US515859

    申请日:1995-08-16

    IPC分类号: H01S5/40 H01S3/19 H01S3/08

    摘要: A semiconductor laser apparatus for broad-angle far-field addressing is disclosed. The apparatus comprises a laser block with lasing cavities. The lasing cavity mirrors are made by dry-etching of the semiconductor block. The width of a lasing cavity is defined by a p contact pad on the laser block; further lateral confinement of current to the cavity is achieved by proton implantation followed by etching of the proton layer. The apparatus achieves quasi-continuous beam steering with a total steering angle of 80.degree. and with 11 resolvable spots.

    摘要翻译: 公开了一种用于广角远场寻址的半导体激光装置。 该装置包括具有激光腔的激光块。 激光腔镜由半导体块的干法蚀刻制成。 激光腔的宽度由激光器块上的p接触焊盘限定; 通过质子注入然后蚀刻质子层来实现电流进入空腔的另外的侧向约束。 该装置实现了准转弯角度为80°的准连续光束转向和11个可分辨点。

    Integrated laser-amplifier with steerable beam
    46.
    发明授权
    Integrated laser-amplifier with steerable beam 失效
    具有可转向光束的集成式激光放大器

    公开(公告)号:US5003550A

    公开(公告)日:1991-03-26

    申请号:US494620

    申请日:1990-03-09

    摘要: A monolithic integrated master oscillator power amplifier (MOPA) device including a single mode diode laser with distributed Bragg reflectors, an amplifier in tandem with the laser, lateral phase controllers and a detuned second order grating surface output coupler, all on a common substrate. The amplifier is a flared waveguide in one embodiment, and a branching network of single mode waveguides followed by an array of single mode gain waveguides in another embodiment. The diode laser is tunable by means of a separate tuning current applied to the rear Bragg reflector. Tuning the laser wavelength provides, in conjunction with the output coupler, a longitudinal steering of the output beam. The lateral phase controllers are an array of separately addressable electrodes that adjust the optical path length to compensate for phase variation in the amplifiers and also to provide lateral steering of the output beam. An additional embodiment includes a chain of amplifiers and grating output couplers for providing multiple output beams.

    摘要翻译: 单片集成主振荡器功率放大器(MOPA)器件,包括具有分布式布拉格反射器的单模二极管激光器,与激光器串联的放大器,横向相位控制器和失谐的二阶光栅表面输出耦合器,均在公共衬底上。 在一个实施例中,放大器是扩口波导,在另一实施例中是单模波导的分支网络,之后是单模增益波导阵列。 二极管激光器可以通过施加到后布拉格反射器的单独的调谐电流来调节。 调谐激光波长与输出耦合器一起提供输出光束的纵向转向。 横向相位控制器是单独可寻址电极的阵列,其调节光路长度以补偿放大器中的相位变化,并且还提供输出光束的横向转向。 附加实施例包括用于提供多个输出光束的放大器链和光栅输出耦合器链。

    Semiconductor laser
    47.
    发明授权
    Semiconductor laser 失效
    半导体激光器

    公开(公告)号:US4797891A

    公开(公告)日:1989-01-10

    申请号:US941842

    申请日:1986-12-15

    摘要: The present invention relates to phased-array semiconductor lasers having a radiation angle turnable by oscillating independently and stably between the fundamental supermode and the higher order supermode and switching the radiation angles by utilizing the property that their radiation angles are different.Optical switching and optical scanning, that have been difficult in the prior art, can be made more easily by use of a semiconductor laser having a turnable radiation angle.The objection of the present invention can be accomplished by disposing separate electrodes at the emission stripes and at the gap between the stripes in the phased-array semiconductor laser.Further, the present invention may be accomplished by dividing at least one stripe electrode in order to form electrode regions. When the current is applied to all the electrodes, oscillation occurs in the highest order mode and the beam is emitted in another direction. When the current is applied to only the electrode exclusive of the electrode regions, oscillation occurs in the fundamental mode and the beam is emitted in a direction vertical to a facet.Moreover, the present invention may be accomplished by disposing electrodes outside the stripe regions of the phased-array semiconductor laser so that oscillation occurs in the fundamental supermode when the electric field is applied to the electrodes and in the higher order mode when the electric field is not applied.

    摘要翻译: 本发明涉及通过利用其辐射角不同的性质,通过在基本超模和高阶超模之间独立且稳定地振荡而切换辐射角的相位阵列半导体激光器。 通过使用具有可转动的辐射角的半导体激光器,可以更容易地使现有技术中难以进行的光学切换和光学扫描。 本发明的反对可以通过在相控阵半导体激光器中的发射条和条之间的间隙设置分开的电极来实现。 此外,本发明可以通过划分至少一个条状电极来形成电极区域来实现。 当电流施加到所有电极时,在最高阶模式下发生振荡,并且光束在另一个方向上发射。 当只将电流施加到不包括电极区域的电极时,基本模式发生振荡,并且在垂直于小面的方向上发射光束。 此外,本发明可以通过将电极设置在相控阵半导体激光器的条纹区域之外来实现,使得当电场施加到电极时在基本超模中发生振荡,并且当电场为 没有申请。

    Optical scanner
    48.
    发明授权
    Optical scanner 失效
    光学扫描仪

    公开(公告)号:US4462658A

    公开(公告)日:1984-07-31

    申请号:US342950

    申请日:1982-01-26

    摘要: An optical scanner with a thin waveguide medium on a substrate includes means to couple a wide collimated beam of radiation into one end of the medium. A periodic array of substantially parallel, spaced electrodes are associated with one major surface of the medium. At least a portion of their electrode lengths extend in a direction substantially parallel with the direction of radiation propagating through the medium. Supply means is provided to apply voltages in a pattern to the electrodes which varies from one electrode to the next adjacent electrode to a predetermined value over several of the electrodes and the same pattern of voltages or a similar pattern of different voltages is applied over several of the next adjacent electrodes up to the predetermined value. In this manner, the pattern is completed across the electrode array to produce a corresponding approximation of a desired phase retardation along a phase front of the propagating radiation in the medium. Further means is employed to change the magnitude of the applied voltages across the electrode array to vary the approximation of the phase retardation to cause the radiation beam to scan in a direction of radiation propagation in the medium.

    摘要翻译: 在衬底上具有薄波导介质的光学扫描器包括将宽准直辐射束耦合到介质的一端的装置。 基本上平行的间隔开的电极的周期性阵列与介质的一个主表面相关联。 其电极长度的至少一部分在与传播通过介质的辐射方向基本平行的方向上延伸。 供给装置被提供以将图案中的电压施加到电极上,这些电极从一个电极到下一个相邻的电极变化到几个电极上的预定值,并且相同的电压模式或相似的不同电压模式被施加在数个 下一个相邻的电极直到预定值。 以这种方式,跨越电极阵列完成图案,以产生沿着介质中的传播辐射的相位前沿的期望相位延迟的对应近似。 采用进一步的手段来改变跨过电极阵列的施加电压的大小,以改变相位延迟的近似,使得辐射束在介质中的辐射传播方向上扫描。