公开(公告)号：US06792010B2

公开(公告)日：2004-09-14

申请号：US10327576

申请日：2002-12-20

申请人： Serguei Koulikov ,  Grzegorz Pakulski ,  Barbara A. Paldus ,  Chris W. Rella ,  Jinchun Xie

发明人： Serguei Koulikov ,  Grzegorz Pakulski ,  Barbara A. Paldus ,  Chris W. Rella ,  Jinchun Xie

IPC分类号： H01S3098

CPC分类号： H01S5/141 ,  H01S3/08036 ,  H01S3/1068 ,  H01S5/1039

摘要： According to the present invention, laser performance is improved by appropriately matching the spectral periods of various etalons within the laser cavity. A first embodiment of the invention is a discretely tunable external cavity semiconductor laser where a grid fixing etalon is present in the laser cavity, the grid fixing etalon free spectral range (FSR) is a whole number multiple of the laser cavity FSR, and the grid fixing etalon FSR is a whole number multiple of the chip etalon FSR. A second embodiment of the invention is a fixed wavelength external cavity semiconductor laser where the chip etalon FSR is a whole number multiple of the laser cavity FSR, and a mode suppressing etalon is inserted into the laser cavity such that the mode suppressing etalon FSR is a whole number multiple of the chip etalon FSR. A third embodiment of the invention is a tunable external cavity semiconductor laser where the chip etalon FSR is a whole number multiple of the laser cavity FSR. A fourth embodiment of the invention is a fixed wavelength external cavity semiconductor laser where the chip etalon FSR is a whole number multiple of the laser cavity FSR.

摘要翻译： 根据本发明，通过适当地匹配激光腔内的各种标准具的光谱周期来提高激光性能。 本发明的第一实施例是离散可调谐的外腔半导体激光器，其中在激光腔中存在格栅固定标准具，格栅固定标准具自由光谱范围（FSR）是激光腔FSR的整数倍，网格 固定标准具FSR是芯片标准具FSR的整数倍。 本发明的第二实施例是一种固定波长的外腔半导体激光器，其中标准具FSR是激光腔FSR的整数倍，并且模式抑制标准具被插入到激光腔中，使得模式抑制标准具FSR为 芯片标准具FSR的整数倍。 本发明的第三实施例是可调谐的外腔半导体激光器，其中标准具FSR是激光腔FSR的整数倍。 本发明的第四实施例是一种固定波长的外腔半导体激光器，其中标准具FSR是激光腔FSR的整数倍。

公开(公告)号：US06693928B2

公开(公告)日：2004-02-17

申请号：US09966152

申请日：2001-09-28

申请人： Randy Dean May

发明人： Randy Dean May

IPC分类号： H01S3098

CPC分类号： H01S5/0687 ,  H01S3/1303 ,  H01S5/0617 ,  H01S5/4087

摘要： The method and system operate to calibrate a transmission laser of the dense wavelength division multiplexer (DWDM) and to lock the laser to a selected transmission wavelength. In one example, the transmission laser is a widely tunable laser (WTL) to be tuned to one of a set of International Telecommunications Union (ITU) transmission grid lines for transmission through an optic fiber. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a set of transmission lines for detection by an etalon fringe detector. Another portion of the beam is routed directly to a laser wavelength detector. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift in the etalon. In one example, the optical components are aligned so that laser wavelength detector receives a portion of the laser beam directly from the laser so that phase characteristics of the laser beam are not affected by an intervening beamsplitter thereby permitting improved wavelength locking. In another embodiment, an etalon chirp filter is provided for reducing or eliminating optical frequency chirp, regardless of the particular ITU channel being used for transmission.

摘要翻译： 该方法和系统用于校准密集波分复用器（DWDM）的传输激光器并将激光器锁定到所选择的传输波长。 在一个示例中，传输激光器是要调谐到一组国际电信联盟（ITU）传输网格线之一的可广泛调谐的激光器（WTL），用于通过光纤传输。 为了将WTL锁定到国际电联电网线路，来自WTL的输出波束的一部分被路由通过标准具将光束分成一组传输线，以便由标准具条纹检测器进行检测。 光束的另一部分直接路由到激光波长检测器。 波长锁定控制器比较来自两个检测器的信号，并调节标准具的温度以使标准具的传输线之一的波长与输出光束的波长对准，然后在反馈回路中控制WTL以锁定 激光到标准具线。 此后，波长锁定控制器监测标准具的温度并保持温度恒定，以防止标准具中的任何波长漂移。 在一个示例中，对准光学部件，使得激光波长检测器直接从激光器接收激光束的一部分，使得激光束的相位特性不受中间分束器的影响，从而允许改进的波长锁定。 在另一个实施例中，提供标准具啁啾滤波器用于减少或消除光频率啁啾，而不管用于传输的特定ITU信道。

公开(公告)号：US06631145B1

公开(公告)日：2003-10-07

申请号：US09626727

申请日：2000-07-27

申请人： Kohichi Robert Tamura ,  Masataka Nakazawa ,  Tetsuro Komukai

发明人： Kohichi Robert Tamura ,  Masataka Nakazawa ,  Tetsuro Komukai

IPC分类号： H01S3098

CPC分类号： H01S5/06256 ,  H01S5/065 ,  H01S5/0657 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/6972

摘要： An arrayed-waveguide grating (AWG) is provided in a tunable mode-locked laser resonator where when a clock signal corresponding to a predetermined wavelength is input, the arrayed-waveguide grating (AWG) generates an output signal having an oscillation wavelength which has an arbitrary wavelength interval independent of the wavelength of said clock signal and a different propagation delay for each wavelength. Furthermore, a transmitter and a wavelength converter is provided that uses a tunable mode-locked laser where the frequency of the clock signal determines the wavelength and where a transmitted data signal at a fixed data rate is generated by setting the clock signal frequency sufficiently higher than the data rate. Furthermore, a wavelength converter and wavelength router is provided that uses said tunable mode-locked laser and in which the output wavelength is determined by extracting said clock signal from the input data signal. Furthermore, a transmission system is provided that uses said transmitter and/or said wavelength converter, and a receiver that recovers the envelope of said transmitted data signal.

摘要翻译： 阵列波导光栅（AWG）设置在可调锁模激光谐振器中，当输入对应于预定波长的时钟信号时，阵列波导光栅（AWG）产生具有振荡波长的输出信号，该振荡波长具有 任意波长间隔与所述时钟信号的波长无关，并且每个波长具有不同的传播延迟。 此外，提供了一种发射机和波长转换器，其使用可调谐锁模激光器，其中时钟信号的频率确定波长，并且通过将时钟信号频率设置为足够高于固定数据速率的传输数据信号来产生 数据速率。 此外，提供了使用所述可调谐锁模激光器的波长转换器和波长路由器，其中通过从输入数据信号提取所述时钟信号来确定输出波长。 此外，提供使用所述发射机和/或所述波长转换器的传输系统，以及恢复所述传输的数据信号的包络的接收机。

公开(公告)号：US06418152B1

公开(公告)日：2002-07-09

申请号：US09507396

申请日：2000-02-18

申请人： Richard L. Davis

发明人： Richard L. Davis

IPC分类号： H01S3098

CPC分类号： H01S5/4062 ,  H01S3/0805 ,  H01S5/0657

摘要： A mode locked semiconductor laser that can generate relatively high-power output pulses. The semiconductor mode locked laser is formed from an array of optical amplifiers that are coupled to a common resonant cavity by way of an optical channelizer or wavelength division multiplexer (WDM). By utilizing an array of optical amplifiers, the output pulses will have a relatively higher power than known mode locked lasers. As such, the mode locked semiconductor laser in accordance with the present invention does not depend on the power handling capability of the individual optical amplifiers and allows the average output power to be scaled, for example, up to the kilowatt range using semiconductor optical amplifiers. A mode locked laser in accordance with the present invention can be implemented with active mode locking, passive mode locking or a hybrid of the two. In embodiments utilizing active mode locking, the output pulse shape can be tailored by the amplifier drive current distribution.

摘要翻译： 可产生相对高功率输出脉冲的锁模半导体激光器。 半导体模式锁定激光器由通过光通道器或波分复用器（WDM）耦合到共用谐振腔的光放大器阵列形成。 通过利用光放大器阵列，输出脉冲将具有比已知的模式锁定激光器更高的功率。 因此，根据本发明的锁模半导体激光器不依赖于各个光放大器的功率处理能力，并且允许使用半导体光放大器将平均输出功率（例如，达到千瓦范围）缩放。 根据本发明的模式锁定激光器可以通过主动模式锁定，被动模式锁定或两者的混合来实现。 在利用主动模式锁定的实施例中，可以通过放大器驱动电流分布来调整输出脉冲形状。

公开(公告)号：US06359913B1

公开(公告)日：2002-03-19

申请号：US09374319

申请日：1999-08-13

申请人： Robert W. Lodenkamper

发明人： Robert W. Lodenkamper

IPC分类号： H01S3098

CPC分类号： H01S3/10092 ,  H01S3/10 ,  H01S3/10015 ,  H01S3/1305 ,  H01S3/1307

摘要： An injection locking system for lasers. In particular, a signal from a master laser is phase modulated and injected into a slave laser. The phase difference &phgr; is maintained at zero by way of a phase locked loop. By maintaining the phase difference &phgr; at zero, the frequency drift is compensated by maintaining the frequency within a predetermined locking range.

摘要翻译： 一种用于激光的注射锁定系统。 特别地，来自主激光器的信号被相位调制并注入到从属激光器中。 通过锁相环将相位差phi保持在零。 通过将相位差phi保持为零，通过将频率保持在预定的锁定范围内来补偿频率漂移。

公开(公告)号：US06347101B1

公开(公告)日：2002-02-12

申请号：US09061797

申请日：1998-04-16

申请人： Xingkun Wu ,  Jouni P. Partanen ,  William F. Hug ,  Hamid Hemmati

发明人： Xingkun Wu ,  Jouni P. Partanen ,  William F. Hug ,  Hamid Hemmati

IPC分类号： H01S3098

CPC分类号： H01S3/0941 ,  B33Y30/00 ,  H01S3/08072 ,  H01S3/1022 ,  H01S3/109

摘要： A solid state laser includes a high absorption coefficient solid state gain medium such as Nd:YVO4 that is side pumped with a semiconductor laser diode array. The resonant cavity of the solid state laser is positioned so that the TEM00 mode is spaced from the face of the laser through which the laser is pumped by a distance sufficient to reduce diffraction losses but sufficiently near to allow coupling of pump light into the gain mode. The gain medium, the doping level of the gain medium, and the operating temperature of the pump laser are selected to efficiently couple pump light into the gain mode. The pump laser is positioned to side pump the gain medium without collimating or focusing optics between the pump laser and the face of the gain medium. A gap between the pump laser and the gain medium is empirically selected to match the angular extent of the pump laser output light to the height of the gain mode at the position of the gain mode fixed to optimize coupling and diffraction losses.

摘要翻译： 固态激光器包括用半导体激光二极管阵列侧泵浦的高吸收系数固态增益介质，例如Nd：YVO4。 固态激光器的谐振腔被定位成使得TEM00模式与激光器的表面间隔开，激光器通过该表面泵浦足够的距离以减少衍射损耗，但足够接近以允许将泵浦光耦合到增益模式 。 选择增益介质，增益介质的掺杂水平和泵激光器的工作温度以有效地将泵浦光耦合到增益模式。 泵浦激光器定位在侧面泵浦增益介质，而不在泵浦激光器和增益介质的面之间准直或聚焦光学元件。 根据经验选择泵浦激光器和增益介质之间的间隙，以将激光输出光的角度范围与固定增益模式位置处的增益模式的高度相匹配，以优化耦合和衍射损耗。

公开(公告)号：US06816515B1

公开(公告)日：2004-11-09

申请号：US09473450

申请日：1999-12-28

申请人： Seok Hyun Yun ,  Byoung Yoon Kim

发明人： Seok Hyun Yun ,  Byoung Yoon Kim

IPC分类号： H01S3098

CPC分类号： H01S3/1112 ,  H01S3/06791 ,  H01S3/106

摘要： The present invention relates to a wavelength-swept laser and a method for generating laser output. The wavelength-swept pulse laser according to one aspect of the present invention uses spontaneous mode-locking to produce a pulse output with the center wavelength continuously varying with time. On the contrary, the wavelength-swept laser according to another aspect of the present invention suppresses mode-locking to produce continuous output by tuning the filter frequency change speed to the frequency shift speed of the frequency shifter. The lasers of the present invention are applicable to optical sensing or WDM optical communication.

摘要翻译： 本发明涉及一种波长扫描激光器和一种用于产生激光输出的方法。 根据本发明的一个方面的波长扫描脉冲激光器使用自发锁模来产生随着时间连续变化的中心波长的脉冲输出。 相反，根据本发明的另一方面的波长扫描激光器通过将滤波器频率变化速度调谐到移频器的频移速度来抑制模式锁定以产生连续输出。 本发明的激光器可应用于光学感测或WDM光通信。

公开(公告)号：US06807198B1

公开(公告)日：2004-10-19

申请号：US10030463

申请日：2002-04-24

申请人： Alexander Fürbach ,  Ferenc Krausz

发明人： Alexander Fürbach ,  Ferenc Krausz

IPC分类号： H01S3098

CPC分类号： H01S3/1118 ,  H01S3/082 ,  H01S3/115 ,  H01S3/235

摘要： A Laser arrangement (1) comprising a pump unit (2) containing a pumped laser crystal (3), and means, such as a saturable absorber (15), for passive mode-locking, wherein two separate, alternatively switchable resonator arms (11, 12) are provided, one resonator arm (11) of which, which is active in a pulse forming phase (21), comprises the saturable absorber (15), whereas the other resonator arm (12), which is active in an amplifying phase (22), is free from components that introduce losses.

摘要翻译： 一种激光装置（1），包括一个包含泵浦激光晶体（3）的泵单元（2），以及用于被动锁模的诸如可饱和吸收器（15）的装置，其中两个可分离的可替换的可共振臂 ，12），其中在脉冲形成阶段（21）中有效的一个谐振器臂（11）包括可饱和吸收器（15），而另一个谐振臂（12）在放大 阶段（22），没有引入损耗的组件。

公开(公告)号：US06738396B2

公开(公告)日：2004-05-18

申请号：US10293049

申请日：2002-11-13

申请人： David M. Filgas ,  Frank Haran ,  Andreas Mank ,  John Robertson

发明人： David M. Filgas ,  Frank Haran ,  Andreas Mank ,  John Robertson

IPC分类号： H01S3098

CPC分类号： H01S3/063 ,  B23K26/0622 ,  B23K26/0624 ,  B23K26/0648 ,  B23K26/0652 ,  B23K26/0732 ,  B23K26/361 ,  B23K2103/42 ,  B23K2103/50 ,  H01S3/0405 ,  H01S3/061 ,  H01S3/0612 ,  H01S3/0615 ,  H01S3/0627 ,  H01S3/08 ,  H01S3/08059 ,  H01S3/08095 ,  H01S3/094084 ,  H01S3/0941 ,  H01S3/1061 ,  H01S3/113 ,  H01S3/2325

摘要： Methods and systems for laser-based processing of materials are disclosed wherein a scalable laser architecture, based on planar waveguide technology, provides for pulsed laser micromachining applications while supporting higher average power applications like laser welding and cutting. Various embodiments relate to improvements in planar waveguide technology which provide for stable operation at high powers with a reduction in spurious outputs and thermal effects. At least one embodiment provides for micromachining with pulsewidths in the range of femtoseconds to nanoseconds. In another embodiment, 100W or greater average output power operation is provided for with a diode-pumped, planar waveguide architecture.

摘要翻译： 公开了用于材料的基于激光的处理的方法和系统，其中基于平面波导技术的可扩展激光器架构提供脉冲激光微加工应用，同时支持更高的平均功率应用，如激光焊接和切割。 各种实施例涉及平面波导技术的改进，其提供在高功率下的稳定操作，同时减少杂散输出和热效应。 至少一个实施例提供了在飞秒范围内的脉冲宽度到纳秒的微加工。 在另一个实施例中，为二极管泵浦的平面波导结构提供100W或更大的平均输出功率操作。

公开(公告)号：US06614816B2

公开(公告)日：2003-09-02

申请号：US09758041

申请日：2001-01-11

申请人： Spartak Gevorgian ,  Nils Calander ,  Mats Karlsson ,  Mattias Nilsson ,  Joakim Een ,  Anders Larsson

发明人： Spartak Gevorgian ,  Nils Calander ,  Mats Karlsson ,  Mattias Nilsson ,  Joakim Een ,  Anders Larsson

IPC分类号： H01S3098

CPC分类号： H03B28/00 ,  H01S5/0623 ,  H01S5/0656 ,  H01S5/4068 ,  H01S5/423

摘要： Microwaves are generated by heterodyning the outputs of two or more optical lasers which have differing central frequencies to produce beat frequencies in the microwave range. One of the beat frequencies is used to modulate the output of at least one of the lasers so as to produce sidebands which differ from the central frequency by an integral number of the sideband frequency. Each laser is connected to one of the other lasers by a weak optical link to optically injection lock the laser to the sideband of the other laser.

摘要翻译： 通过对具有不同中心频率的两个或多个光学激光器的输出进行外差来产生微波，以在微波范围内产生拍频。 拍频之一用于调制至少一个激光器的输出，以便产生与中心频率不同的边带频率的整数倍的边带。 每个激光器通过弱光连接器连接到其他激光器之一，以将激光器光学注射锁定到另一激光器的边带。