公开(公告)号：EP1803200A4

公开(公告)日：2009-07-22

申请号：EP05853418

申请日：2005-12-08

申请人： IMRA AMERICA INC

发明人： HOFFMAN ROBERT ,  NATI SALVATORE F ,  GU XINHUA ,  LIU ZHENLIN

IPC分类号： H01S3/13

CPC分类号： H01S3/1022 ,  H01S3/0014 ,  H01S3/0401 ,  H01S3/0941 ,  H01S3/10007 ,  H01S3/10046 ,  H01S3/10069

摘要： A method and apparatus for detecting and controlling the conditions needed for starting and maintaining mode-locked operation of a laser system including a fiber oscillator and high power fiber amplifier. The invention is used to monitor the output power and repetition rate of the fiber oscillator and control the operation of the oscillator such that the oscillator obtains and maintains correct mode-locked operation despite changes in environmental conditions such as temperature, and also with changes due to component aging or degradation.

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.