| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact and low-cost ultra-narrow band optical filter capable of providing the number of lines similar to those of a conventional circuit element of a highest level. <P>SOLUTION: An optical fiber-type filter includes: an optical fiber Bragg grating FBG drawn inside a first optical fiber; a wide band mirror WM configured at an end face of a second optical fiber; and a connecting component for connecting them. Alternatively, an optical fiber-type filter includes an optical fiber Bragg grating FBG drawn inside the optical fiber, and a wide band mirror WM configured at an end face of the optical fiber. <P>COPYRIGHT: (C)2013,JPO&INPIT |
