• Title/Summary/Keyword: Three-port circulator

Search Result 2, Processing Time 0.018 seconds

A four-port stripline circulator using a single ferrite disk (단일 페라이트 공진기를 이용한 4단자 스트립라인 서큘레이터)

  • Kim, Hye-Jin;Nam, Min-Hee;Lee, Jae-Hyun
    • Journal of Satellite, Information and Communications
    • /
    • v.4 no.2
    • /
    • pp.52-56
    • /
    • 2009
  • The design method of a four-port stripline circulator with a single ferrite disk is proposed using Green's function method. The four-port circulator gives the flexibility of the design of the communication system. Two cascaded three-port circulators has been used as a four-port circulator. However, if a four-port circulator with a single ferrite disk replace the present four-port circulator, then it will give less weight and volume and so has the advantage in satellite application.

  • PDF

Single-longitudinal-mode unidirectional fiber laser using fiber Bragg grating (광섬유 브래그 격자를 이용한 단일 종모드 단방향 광섬유 레이저)

  • 이정찬;전영민;김명욱;김봉규;이상배;김상국;최상삼;이상선
    • Korean Journal of Optics and Photonics
    • /
    • v.10 no.3
    • /
    • pp.233-236
    • /
    • 1999
  • We have constructed a narrow-linewidth single-longitudinal-mode unidirectional $Er^{3+}$ -doped fiber laser using a fiber Bragg grating incorporated by a three port optical circulator with a compact configuration. Using a conventional delayed self-heterodyne detection technique with Mach-Zehnder interferometer a linewidth of 5 kHz was measured. In a single-longitudinal-mode operation, output power of up to 2.7 mW at 1548 nm were obtained for a launched pump power of 43 mW at 980 nm.

  • PDF