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公开(公告)号：US5208822A
公开(公告)日：1993-05-04
申请号：US732284
申请日：1991-07-18
申请人： Hermann A. Haus , Katsuyuki Utaka
发明人： Hermann A. Haus , Katsuyuki Utaka
IPC分类号： H01S5/00 , H01S3/1055 , H01S5/06 , H01S5/0625 , H01S5/10 , H01S5/12 , H01S5/125 , H01S5/34
CPC分类号： B82Y20/00 , H01S3/1055 , H01S5/0625 , H01S5/06258 , H01S5/10 , H01S5/0618 , H01S5/06256 , H01S5/1057 , H01S5/12 , H01S5/124 , H01S5/125 , H01S5/341
摘要： A semiconductor optical element comprises a semiconductor substrate, a waveguide, an active layer and a clad layer mounted on said substrate; said active layer comprising first region and second region coupled optically with each other, and having opposite signs of .alpha. parameters with each other, where said parameter is ratio of change of refractive index to change of gain following change of carrier density; a first electrode common to all regions attached on one side of said substrate; and second electrodes for each region attached on the other side of said substrate. The invention is used for an AM modulation laser, or an FM modulation laser.
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公开(公告)号：US4464759A
公开(公告)日：1984-08-07
申请号：US550064
申请日：1983-11-09
申请人： Hermann A. Haus , Lance A. Glasser , Ping-Tong Ho
发明人： Hermann A. Haus , Lance A. Glasser , Ping-Tong Ho
CPC分类号： H01S5/065 , H01S5/0014 , H01S5/14
摘要： A semiconductor diode laser system with microwave mode locking. The system includes a semiconductor laser diode and an external reflector positioned to receive radiation that emits from the diode and reflects the same back into the diode, the microwave mode locking serving to modulate the radiation and the external reflector being properly positioned to return the radiation to the diode at a return time equal to the period of the drive signal or a submultiple thereof.
摘要翻译： 具有微波模式锁定的半导体二极管激光系统。 该系统包括半导体激光二极管和外部反射器，其被定位成接收从二极管发射并将其反射回二极管的辐射，微波模式锁定用于调制辐射并且外部反射器正确定位以使辐射返回到 二极管在返回时间等于驱动信号的周期或其次数。
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公开(公告)号：US5915051A
公开(公告)日：1999-06-22
申请号：US792916
申请日：1997-01-21
申请人： Jay N. Damask , Thomas E. Murphy , Juan Ferrera , Michael Hong Yeol Lim , Henry I. Smith , Hermann A. Haus
发明人： Jay N. Damask , Thomas E. Murphy , Juan Ferrera , Michael Hong Yeol Lim , Henry I. Smith , Hermann A. Haus
CPC分类号： G02B6/12007 , G02F1/3136 , G02B2006/12107 , G02B2006/12173
摘要： A wavelength-selective optical switch having a first input port for accepting a plurality of copropagating optical channels, each of the channels having a distinct wavelength band. The optical switch includes first and second output ports. A wavelength-selective optical filter is connected to receive the copropagating optical channels from the first input port to extract a selected one of the channels while allowing the remaining channels to copropagate to the first output port. An interferometric switch is connected to receive the selected extracted channel; the interferometric switch includes a controller for controlling propagation of the selected extracted channel to either the second output port, the optical filter, or both. The optical filter is connected to receive from the interferometric switch an optical channel to be combined with the remaining copropagating channels and all directed to the first output port. In a first control state of the controller, the interferometric switch is adapted to direct the selected extracted channel to the optical filter, while in a second control state of the controller, the interferometric switch is adapted to direct the selected extracted channel to the second output port. A second input port can be provided for accepting an injected optical channel having a wavelength band corresponding to the wavelength band of the selected extracted channel. This second input port is connected to direct the injected optical channel to the interferometric switch. In this scenario, the interferometric switch is adapted, in the second control state of the controller, to direct the injected channel to the optical filter, and is adapted to direct the injected channel, in a first control state of the controller, to the second output port.
摘要翻译： 一种波长选择性光开关，具有用于接收多个共传播光信道的第一输入端口，每个信道具有不同的波段。 光开关包括第一和第二输出端口。 连接波长选择性滤光器以从第一输入端口接收共同传播的光通道，以提取所选择的一个通道，同时允许其余通道共同传播到第一输出端口。 连接干涉式开关以接收所选择的提取的通道; 干涉式开关包括控制器，用于控制所选择的提取的通道到第二输出端口，滤光器或两者的传播。 光滤波器被连接以从干涉式开关接收要与剩余的共同传播信道组合的光信道，并且全部被引导到第一输出端口。 在控制器的第一控制状态下，干涉式开关适于将所选择的提取的通道引导到滤光器，而在控制器的第二控制状态下，干涉式开关适于将所选择的提取的通道引导至第二输出 港口。 可以提供第二输入端口用于接受具有与所选择的提取的信道的波长带相对应的波长带的注入光信道。 该第二输入端口被连接以将注入的光通道引导到干涉式开关。 在这种情况下，在控制器的第二控制状态下，干涉式开关适应于将注入的通道引导到滤光器，并且适于在控制器的第一控制状态下将注入的通道引导到第二 输出端口
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公开(公告)号：US5677767A
公开(公告)日：1997-10-14
申请号：US501885
申请日：1995-07-13
CPC分类号： G01C19/72
摘要： The invention comprises an interferometer for detecting rotation in which a single light beam is split by a first polarizing beam splitter into two linearly, orthogonally polarized beams and introduced to opposite ends of a linear polarization maintaining fiber optic loop formed of a Kerr medium optical fiber material having a 90.degree. twist therein. Upon exiting the opposite ends of the loop, the two beams are recombined by the first polarizing beam splitter into a single beam. The recombined light beam is seperated from the input light beam and is passed through a quarter-wave plate which converts the linear polarization to circular polarization. The circularly polarized beam is then passed through a second polarizing beam splitter to form two separate beams of distinct intensity dependent upon the two distinct circular polarizations contained in the incident beam. The two light beams are introduced to a balanced detector whereupon the difference in intensity of the two light beams is detected. This difference in intensity indicates the rotational direction and velocity of the fiber optic loop, thus allowing the device to be used to detect rotation.
摘要翻译： 本发明包括用于检测旋转的干涉仪，其中单个光束被第一偏振分束器分裂成两个线性正交偏振光束，并被引入到由克尔介质光纤材料形成的线偏振保持光纤回路的相对端 在其中扭转90度。 当离开环路的相对端时，两个光束由第一偏振分束器复合成单个光束。 复合光束与输入光束分离，并通过将线偏振转换为圆偏振的四分之一波片。 然后圆偏振光束通过第二偏振光束分离器，以形成两个独立的不同强度的光束，这取决于入射光束中包含的两个不同的圆偏振。 将两个光束引入平衡检测器，由此检测两个光束的强度差。 这种强度差异表示光纤回路的旋转方向和速度，从而允许该装置用于检测旋转。
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公开(公告)号：US5617434A
公开(公告)日：1997-04-01
申请号：US635846
申请日：1996-04-22
CPC分类号： H01S3/06791 , H01S2301/08 , H01S3/06712 , H01S3/06725 , H01S3/1112 , Y10S372/70
摘要： A fiber laser for producing high energy ultrashort laser pulses, having a positive-dispersion fiber segment and a negative-dispersion fiber segment joined in series with the positive-dispersion fiber segment to form a laser cavity. With this configuration, soliton effects of laser pulse circulation in the cavity are suppressed and widths of laser pulses circulating in the cavity undergo large variations between a maximum laser pulse width and a minimum laser pulse width during one round trip through the cavity. The fiber laser also provides means for modelocking laser radiation in the laser cavity, means for providing laser radiation gain in the laser cavity, and means for extracting laser pulses from the laser cavity. Using selected positive- and negative-dispersion fiber segments, the laser cavity exhibits a net positive group velocity dispersion, and the ratio of the maximum laser pulse width to the minimum laser pulse width attained during one round trip through the cavity is greater than 5, and preferably greater than 10. The laser cavity may be configured as a linear cavity geometry, a ring cavity geometry, a figure eight geometry, or a Sagnac loop reflector geometry, among others. Preferably the ring cavity is configured to achieve unidirectional circulation of laser pulses in the ring cavity, and with this configuration, is shown to produce laser pulses having a pulse width of less than 100 fs and a pulse energy of at least 80 pJ.
摘要翻译： 一种用于生产高能超短激光脉冲的光纤激光器，具有与正色散光纤段串联的正色散光纤段和负色散光纤段，以形成激光腔。 通过这种配置，抑制腔内的激光脉冲循环的孤子效应，并且在通过空腔的一次往返行程期间在空腔中循环的激光脉冲的宽度在最大激光脉冲宽度和最小激光脉冲宽度之间经历较大的变化。 光纤激光器还提供用于在激光腔中锁模激光辐射的装置，用于在激光腔中提供激光辐射增益的装置，以及用于从激光腔提取激光脉冲的装置。 使用选定的正和负色散光纤段，激光腔表现出净正组速度色散，最大激光脉冲宽度与通过腔体的一次往返行程中获得的最小激光脉冲宽度之比大于5， 并且优选地大于10.激光腔可以被配置为线性腔几何形状，环形腔几何形状，图形八面体形状或者Sagnac环形反射器几何形状等等。 优选地，环腔被配置为实现激光脉冲在环腔中的单向循环，并且在该配置下，示出了产生具有小于100fs的脉冲宽度和至少80pJ的脉冲能量的激光脉冲。
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公开(公告)号：US4184131A
公开(公告)日：1980-01-15
申请号：US926380
申请日：1978-07-20
申请人： Hermann A. Haus
发明人： Hermann A. Haus
CPC分类号： H03H9/02637 , H03H9/02685 , H03H2260/00
摘要： Surface acoustic wave resonators are used to provide band pass filters. The length of each resonator is related to the lumped constant inductor and capacitor values of the components of the low pass filter equivalent. This invention allows high frequency s.a.w. type filters to be constructed by reference to already available inductor and capacitor values from tables of low pass filter designs.
摘要翻译： 表面声波谐振器用于提供带通滤波器。 每个谐振器的长度与低通滤波器等效元件的集总常数电感和电容值有关。 本发明允许高频率s.a.w. 类型滤波器通过参考低通滤波器设计表中已经可用的电感和电容值来构造。
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