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    MODE-LOCKING SEMICONDUCTOR DISK LASER (SDL)
    4.
    发明申请
    MODE-LOCKING SEMICONDUCTOR DISK LASER (SDL) 审中-公开
    模式锁定半导体激光器（SDL）

    公开(公告)号：US20160254645A1

    公开(公告)日：2016-09-01

    申请号：US15032405

    申请日：2014-10-29

    Applicant: SOLUS TECHNOLOGIES LIMITED

    Inventor： Craig James HAMILTON ,  Graeme Peter Alexander MALCOLM

    IPC: H01S5/065 ,  H01S5/125 ,  H01S5/12

    CPC classification number: H01S5/0657 ,  H01S3/08059 ,  H01S3/0813 ,  H01S3/09415 ,  H01S3/1118 ,  H01S5/02484 ,  H01S5/041 ,  H01S5/12 ,  H01S5/1221 ,  H01S5/125 ,  H01S5/141 ,  H01S5/18383 ,  H01S2301/02

    Abstract: The present invention describes a mode locking semiconductor disk laser (SDL). The laser comprises a resonator terminated by first and second mirrors (6,7) and folded by a third mirror. The third mirror or comprising a semiconductor disk laser (8) suitable for generating a resonator field comprising a predetermined central wavelength A0 while the second mirror comprising an intensity saturable mirror (7) suitable for mode locking the resonator field at the predetermined wavelength. The reflectivity of the of the resonator at the central wavelength A0 is reduced by shifting the reflectivity profiles of the first and or second mirrors to wavelength shorter than the predetermined wavelength so as to suppress gain at wavelengths longer than the central wavelength A0. By mismatching the reflectivity profile (32) of the second mirror (7) to that of the desired output wavelength (3) provides a stable mode locked laser with significantly reduced noise. The SDL may comprise a DBR with a reflectivity profile (1) having a peak wavelength corresponding to the laser emission (3). The gain medium comprises a RPG structure of the active region resulting in a Fabry-Perot with a FSR as indicated by the corresponding reflectivity profile (2). The peak reflection of the DBR of the saturable absorber mirror may be shifted towards shorter wavelengths with respect to the laser emission by an amount corresponding to one half to one FSR of said RPG active region.

    Abstract translation: 本发明描述了一种模式锁定半导体盘激光器（SDL）。 激光器包括由第一和第二反射镜（6,7）端接并由第三反射镜折叠的谐振器。 第三镜或包括适于产生包括预定中心波长A0的谐振器场的半导体盘激光器（8），而第二镜包括适于将谐振器场的模式锁定在预定波长的强度可饱和镜（7）。 谐振器在中心波长A0处的反射率通过将第一和/或第二反射镜的反射率分布移动到比预定波长短的波长来减小，以便抑制比中心波长A0长的波长的增益。 通过使第二反射镜（7）的反射率分布（32）与期望输出波长（3）的反射率分布（32）不匹配，提供了具有显着降低的噪声的稳定模式锁定激光器。 SDL可以包括具有对应于激光发射（3）的峰值波长的反射率分布（1）的DBR。 增益介质包括有源区域的RPG结构，得到具有如对应的反射率分布（2）所示的FSR的法布里 - 珀罗（Fabry-Perot）。 可饱和吸收反射镜的DBR的峰值反射可以相对于激光发射的较短波长移动相当于所述RPG有源区域的一半到一个FSR的量。

    SPATIALLY DISTRIBUTED LASER RESONATOR
    6.
    发明申请
    SPATIALLY DISTRIBUTED LASER RESONATOR 有权
    空间分布激光共振器

    公开(公告)号：US20160087391A1

    公开(公告)日：2016-03-24

    申请号：US14961156

    申请日：2015-12-07

    Applicant: WI-CHARGE LTD.

    Inventor： Refael DELLA-PERGOLA ,  Ortal Alpert ,  Omer Nahmias ,  Victor Vaisleib

    IPC: H01S3/06 ,  H01S3/16 ,  H01S3/081 ,  H01S3/00 ,  H01S3/08

    CPC classification number: H01S3/08054 ,  H01S3/0014 ,  H01S3/005 ,  H01S3/0604 ,  H01S3/0627 ,  H01S3/08 ,  H01S3/0805 ,  H01S3/0813 ,  H01S3/0815 ,  H01S3/1611 ,  H01S3/1643 ,  H02J3/383 ,  H02J50/30 ,  H04B10/807

    Abstract: A distributed resonator laser system using retro-reflecting elements, in which spatially separated retroreflecting elements define respectively a power transmitting and a power receiving unit. The retroreflectors have no point of inversion, so that an incident beam is reflected back along a path essentially coincident with that of the incident beam. This enables the distributed laser to operate with the beams in a co-linear mode, instead of the ring mode described in the prior art. This feature allows the simple inclusion of elements having optical power within the distributed cavity, enabling such functions as focusing/defocusing, increasing the field of view of the system, and changing the Rayleigh length of the beam. The optical system can advantageously be constructed as a pupil imaging system, with the advantage that optical components, such as the gain medium or a photo-voltaic converter, can be positioned at such a pupil without physical limitations.

    Abstract translation: 一种使用后向反射元件的分布式谐振器激光系统，其中空间分离的回射元件分别定义功率传输和功率接收单元。 后向反射器没有反转点，使得入射光束沿着基本上与入射光束重合的路径被反射回来。 这使得分布式激光器能够以共线模式操作光束，而不是现有技术中描述的环形模式。 该特征允许在分布腔内简单地包括具有光功率的元件，从而实现诸如聚焦/散焦，增加系统的视野和改变光束的瑞利长度的功能。 光学系统可以有利地被构造为光瞳成像系统，其优点在于，诸如增益介质或光伏转换器之类的光学部件可以在没有物理限制的情况下被定位在这样的瞳孔处。

    MULTI-STAGE MOPA WITH FIRST-PULSE SUPPRESSION
    8.
    发明申请
    MULTI-STAGE MOPA WITH FIRST-PULSE SUPPRESSION 有权
    多阶段MOPA与第一脉冲抑制

    公开(公告)号：US20150070753A1

    公开(公告)日：2015-03-12

    申请号：US14022129

    申请日：2013-09-09

    Applicant: COHERENT KAISERSLAUTERN GMBH

    Inventor： Ralf KNAPPE ,  Albert SEIFERT ,  Alexander Weis

    IPC: H01S5/04

    CPC classification number: H01S5/041 ,  H01S3/08072 ,  H01S3/0813 ,  H01S3/091 ,  H01S3/09415 ,  H01S3/10015 ,  H01S3/10046 ,  H01S3/11 ,  H01S3/1106 ,  H01S3/2308 ,  H01S3/2316 ,  H01S3/2341

    Abstract: A solid-state MOPA includes a mode-locked laser delivering a train of pulses. The pulses are input to a fast E-O shutter, including polarization-rotating elements, polarizing beam-splitters, and a Pockels cell that can be driven alternatively by high voltage (HV) pulses of fixed long and short durations. A multi-pass amplifier follows the E-O shutter. The E-O shutter selects every Nth pulse from the input train and delivers the selected pulses to the multi-pass amplifier. The multi-pass amplifier returns amplified seed-pulses to the E-O shutter. The shutter rejects or transmits the amplified pulses depending on whether the HV-pulse duration is respectively short or long. Transmitted amplified pulses are delivered to a transient amplifier configured for separately suppressing first-pulse over-amplification and residual pulse leakage.

    Abstract translation: 固态MOPA包括提供脉冲串的锁模激光器。 脉冲输入到快速E-O快门，包括偏振旋转元件，偏振光束分离器和可以通过固定的长时间和短持续时间的高电压（HV）脉冲交替驱动的Pockels单元。 多通道放大器遵循E-O快门。 E-O快门从输入列中选择第N个脉冲，并将所选择的脉冲传送到多通道放大器。 多通道放大器将放大的种子脉冲返回到E-O快门。 根据HV脉冲持续时间分别短或长，快门拒绝或发送放大的脉冲。 传输的放大脉冲被传送到配置用于分别抑制第一脉冲过放大和残余脉冲泄漏的瞬态放大器。

    SELF MODE-LOCKING SEMICONDUCTOR DISK LASER
    9.
    发明申请
    SELF MODE-LOCKING SEMICONDUCTOR DISK LASER 有权
    自锁式半导体激光器

    公开(公告)号：US20150063389A1

    公开(公告)日：2015-03-05

    申请号：US14389212

    申请日：2013-03-27

    Applicant: SOLUS TECHNOLOGIES LIMITED

    Inventor： Craig James Hamilton ,  Graeme Peter Alexander Malcolm ,  Lukasz Kornaszeski

    IPC: H01S5/22 ,  H01S5/065

    CPC classification number: H01S5/2228 ,  H01S3/0805 ,  H01S3/0813 ,  H01S3/0816 ,  H01S3/094053 ,  H01S3/1112 ,  H01S5/02484 ,  H01S5/041 ,  H01S5/065 ,  H01S5/0657 ,  H01S5/141 ,  H01S5/183

    Abstract: The present invention describes a self mode locking laser and a method for self mode locking a laser. The laser (1) comprises a resonator terminated by first (3) and second (4) mirrors and folded by a third mirror (5). The third mirror comprises a single distributed Bragg reflector (17) upon which is mounted a multilayer semiconductor gain medium (18) and which includes at least one quantum well layer and an optical Kerr lensing layer (22). Self mode locking may be achieved by configuring the laser resonator such that the lensing effect of the Kerr lensing layer acts to reduce an astigmatism deliberately introduced to the cavity mode. The self mode locking of the laser may be further enhanced by selecting the length of the resonator such that a round trip time of a cavity mode is matched with an upper-state lifetime of one or more semiconductor carriers located within the gain medium.

    Abstract translation: 本发明描述了一种自锁式激光器和一种自锁式激光器的方法。 激光器（1）包括由第一（3）和第二（4）反射镜端接并由第三反射镜（5）折叠的谐振器。 第三反射镜包括单个分布式布拉格反射器（17），其上安装有多层半导体增益介质（18），并且其包括至少一个量子阱层和光学克尔透镜层（22）。 可以通过配置激光谐振器来实现自锁定，使得克尔透镜层的透镜效应用于减少有意引入空腔模式的象散。 可以通过选择谐振器的长度使得腔模式的往返时间与位于增益介质内的一个或多个半导体载体的上限寿命相匹配来进一步增强激光器的自锁定。

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