Lopa R, Harmadi H. Rancang Bangun Sistem Pengukuran Frekuensi Getaran Akustik Berbasis Directional Coupler Serat Optik. JFU [Internet]. 2022 Apr. 1 [cited 2026 Oct. 29];11(2):187-93. Available from: https://jfu.fmipa.unand.ac.id/index.php/jfu/article/view/824