| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a variable optical attenuator capable of adjusting high power light exceeding 1 W to a required optical level. <P>SOLUTION: The variable optical attenuator for attenuating high power light transmitted by an optical fiber, in a state of light includes: two optical fibers 21 having end faces butted to each other on an optical axis; a liquid refractive index adjusting agent 24 which has a part of respective optical fibers 21 including the end faces, inserted thereinto and has almost the same refractive index as cores of optical fibers 21 under passage of the high power light; and an actuator 28 in a lengthwise direction which changes an interval between the end faces of two optical fibers 21. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
