title: Fiber-optic tunable filter with a concave mirror.
abstract: In order to implement a fiber-optic Fabry-Perot tunable filter with a simple configuration, a concave mirror is made at the end of the optical fiber. The concave mirror is fabricated by attaching a thin polycarbonate (PC) film on the fiber end, pressing the PC film with a fiber ball to form a dimple, and then depositing a multilayer dielectric mirror. The concave mirror aligned to the fiber core makes the cavity alignment easy with a simple alignment configuration. Because of the self-alignment function of this cavity, a small, reliable, and fast filter could be fabricated.
authors.affiliation: School of Electronics and Information, Kyung Hee University and Institute for Laser Engineering, YongIn, KyungKi, South Korea. yhyh@khu.ac.kr
authors.forename: Yunhae
authors.initials: Y
authors.lastname: Yeh
authors.forename: Se Hoon
authors.initials: SH
authors.lastname: Park