公开(公告)号：US20170077668A1

公开(公告)日：2017-03-16

申请号：US14854020

申请日：2015-09-14

Applicant: NATIONAL APPLIED RESEARCH LABORATORIES

Inventor： SHENG HSIUNG CHANG ,  REN-YOUNG LIU ,  CHII-CHANG CHEN ,  CHAO-YI TAI

IPC: H01S3/094 ,  H01S3/067 ,  H01S3/16

CPC classification number: H01S3/094076 ,  H01S3/0007 ,  H01S3/0014 ,  H01S3/06795 ,  H01S3/1608

Abstract: An optical fiber apparatus and a method of recovering radiation-induced-attenuation (RIA) onto a rare-earth-doped optical fiber under irradiation are provided in this disclosure. A light source is coupled to a rare-earth doped optical fiber. The light source emits a combination of mode locked pulsed light and non-mode locked quasi-continuous-wave light. The mode locked pulsed light are used to recover RIA onto the rare-earth doped optical fiber in real time, and the non-mode locked light are used to pump the rare-earth doped optical fiber as a gain medium. Each pulsed duration of the mode locked pulsed light is much shorter than operation duration of the non-mode locked light, such that an instantaneous power of the mode locked pulsed light exceeds a saturated pumping power required for the rare-earth doped optical fiber, so as to effectively elevate the core temperature of rare-earth doped fiber to achieve a confined photo-annealed recovery of RIA onto rare-earth doped fibers.

Abstract translation: 在本公开中提供了一种光纤装置和在照射下在稀土掺杂光纤上恢复辐射诱导衰减（RIA）的方法。 光源耦合到稀土掺杂光纤。 光源发射锁模脉冲光和非模式锁定准连续波光的组合。 模式锁定脉冲光用于实时地将稀土掺杂的光纤恢复到稀土掺杂的光纤上，非模式锁定光用于泵浦稀土掺杂光纤作为增益介质。 模式锁定脉冲光的每个脉冲持续时间比非模式锁定光的操作持续时间短得多，使得锁模脉冲光的瞬时功率超过稀土掺杂光纤所需的饱和泵浦功率，因此 以有效地提高稀土掺杂光纤的核心温度，以实现RIA在稀土掺杂光纤上的受限光退火恢复。