公开(公告)号：EP1627252A4

公开(公告)日：2010-05-26

申请号：EP04785507

申请日：2004-05-14

申请人： IMRA AMERICA INC

发明人： HARTER DONALD J ,  UEHARA YUZURU

IPC分类号： H01S3/00 ,  G02B6/34 ,  G02F20060101 ,  H01S3/067 ,  H01S3/094 ,  H01S3/13 ,  H01S3/16 ,  H01S3/23 ,  H04B10/155

CPC分类号： H01S3/0057 ,  G02B6/2932 ,  G02B6/29374 ,  H01S3/067 ,  H01S3/06708 ,  H01S3/06716 ,  H01S3/06725 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/08013 ,  H01S3/094003 ,  H01S3/094076 ,  H01S3/0941 ,  H01S3/10046 ,  H01S3/11 ,  H01S3/1106 ,  H01S3/1608 ,  H01S3/1618 ,  H01S3/2308 ,  H01S5/0057 ,  H04B10/508

摘要： A system comprising: a) a light source, wherein said source comprises a quasi-cw laser diode (31); b) a lithium niobate modulator (32) arranged to receive output of said light source and outputting pulses which are less than or equal to approximately 10 ns at a repetition rate in a range of from 1 kHz to less than 10 MHz, and said modulator (32) is disposed at an output of said cw laser diode (31); c) an amplifier (33) arranged to amplify pulses output by said modulator (32); and d) a fiber (34) with positive, i.e. normal, group-velocity dispersion (GVD) and self phase modulation receiving an output of said amplifier (33). The quasi cw laser diode (31) is gated so that it does not emit for significantly longer times than the pulse duration. The output of the positive GVD fiber may be compressed to produce fs pulses with variable repetition rate.

摘要翻译： 一种系统，包括：a）光源，其中所述源包括准cw激光二极管（31）; b）铌酸锂调制器（32），其布置成接收所述光源的输出并以1kHz至小于10MHz的范围内的重复频率输出小于或等于约10ns的脉冲，并且所述调制器 （32）设置在所述cw激光二极管（31）的输出处; c）布置成放大由所述调制器（32）输出的脉冲的放大器（33）; 以及d）具有正的，即正常的组 - 速度色散（GVD）的光纤（34）和接收所述放大器（33）的输出的自相位调制。 准cw激光二极管（31）被选通，使得其不发射比脉冲持续时间更长的时间。 正GVD光纤的输出可以被压缩以产生具有可变重复率的fs脉冲。

公开(公告)号：EP1815281A4

公开(公告)日：2009-05-06

申请号：EP05725660

申请日：2005-03-14

申请人： IMRA AMERICA INC

发明人： FERMANN MARTIN E ,  IMESHEV GENNADY ,  CHO GYU CHOEN ,  LIU ZHENLIN ,  HARTER DONALD J

IPC分类号： G02B6/02 ,  G02B6/26 ,  H01S3/00 ,  H01S3/067 ,  H01S3/108 ,  H04B10/00

CPC分类号： H01S3/0057 ,  H01S3/0064 ,  H01S3/0078 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/06741 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094007 ,  H01S3/1086 ,  H01S3/1301 ,  H01S3/1608 ,  H01S3/1618 ,  H01S3/2308 ,  H01S3/2316 ,  H01S3/302

摘要： By compensating polarization mode-dispersion as well chromatic dispersion in photonic crystal fiber pulse compressors, high pulse energies can be obtained from all-fiber chirped pulse amplification systems. By inducing third-order dispersion in fiber amplifiers via self-phase modulation, the third-order chromatic dispersion from bulk grating pulse compressors can be compensated and the pulse quality of hybrid fiber/bulk chirped pulse amplification systems can be improved. Finally, by amplifying positively chirped pulses in negative dispersion fiber amplifiers, low noise wavelength tunable seed source via anti-Stokes frequency shifting can be obtained.

公开(公告)号：EP1639677A4

公开(公告)日：2015-11-25

申请号：EP04751761

申请日：2004-05-25

申请人： IMRA AMERICA INC

发明人： GU XINHUA ,  UEHARA YUZURU ,  HARTER DONALD J

IPC分类号： H01S3/00 ,  H01S20060101 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/16 ,  H01S3/23 ,  H01S4/00

CPC分类号： H01S3/2333 ,  H01S3/0057 ,  H01S3/0085 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/1608 ,  H01S3/1618 ,  H01S3/2316

摘要： A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A pulse selector may be an integrated electro-optic modulator, for example a LiNbO3 modulator, or an electro-absorption modulator. Difficulties related to free-space alignment and operational stability of some prior designs are reduced or eliminated. Fiber coupling generally simplifies beam delivery and alignment. Some embodiments include an erbium fiber (or erbium-ytterbium) based CPA system operating at a wavelength of approximately 1550 nanometers. Similar performance can be obtained at other wavelengths, for example a 1.06 .micrometer Yb-doped fiber system. Moreover, high amplification and peak intensity at the output may be achieved while avoiding non-linear effects in the pulse selector, thereby providing for high intensity picosecond or femtosecond operation.

公开(公告)号：EP1629575A4

公开(公告)日：2007-06-27

申请号：EP04751756

申请日：2004-05-24

申请人： IMRA AMERICA INC

发明人： FERMANN MARTIN E ,  IMESHEV GENNADY ,  HARTL INGMAR ,  HARTER DONALD J

IPC分类号： H01S3/00 ,  G02B6/26 ,  H01S20060101 ,  H01S3/067 ,  H01S3/23

CPC分类号： H01S3/06754 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/094007 ,  H01S3/10015

摘要： By writing non-linear chirp into fiber Bragg gratings, greater control over dispersion compensation in CPA systems is obtained, such that, for example, the dispersion profile of the fiber Bragg grating and a bulk compressor may be matched. An iterative method of writing the fiber grating can reduce the group delay ripple to very low levels; and adaptive control of the fiber grating dispersion profile can further reduce these levels, while in addition offering greater acceptable yield in the manufacture of such gratings. Fiber Bragg gratings may be designed so as to provide customized pulse shapes optimized for various end uses, such as micromachining, for example, and may also be used to counteract gain-narrowing in a downstream amplifier.