JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Nishio, M. AU - Futagawa, N. AU - Kawashima, S. AU - Nakajima, H. AU - Nishikawa, K. AU - Takabayashi, T. AU - Tanaka, S. AU - Torii, C. ED - Pak, Cheol-on ED - Kurokawa, Shin-ichi ED - Katoh, Tadahiko ED - Furukawa, Kazuro ED - Schaa, Volker RW TI - An Optical Fiber Phase Lock Network of a Radio Interferometer J2 - Proc. of ICALEPCS1991, Tsukuba, Japan, 11-15 November 1991 CY - Tsukuba, Japan T2 - International Conference on Accelerator and Large Experimental Physics Control Systems T3 - 3 LA - english AB - A new phase-lock network using fiber-optic system was developed as a local signal distribution system for 84 antennas of the Nobeyama Radioheliograph. This network is an open loop system and consists of a master oscillator with an E/O converter, an 1-to-84 optical divider, phase stable optical fiber cables and phase stable phase-locked oscillators with O/E converters. Phase stability of the network and phase noise generated at the O/E converter are discussed. This phase-lock network insures the required phase stability of 3°/6 hours. The phase noise increases the coherent loss of 0.1 \% at the correlator output, which is very low. This is the first large application of fiber optic devices to an open loop phase-lock network. Our system is very simple and phase-stable. Therefore, it is suitable to the connected array with large number of antennas. PB - JACoW Publishing CP - Geneva, Switzerland SP - 371 EP - 374 KW - network KW - controls KW - linac KW - detector KW - gun DA - 1992/12 PY - 1992 SN - 2226-0358 SN - 978-3-95450-254-7 DO - doi:10.18429/JACoW-ICALEPCS1991-S10TS08 UR - https://jacow.org/icalepcs1991/papers/s10ts08.pdf ER -