Title :
Development of an ultrastable fiber optic frequency distribution system using an optical delay control module [for frequency standard and VLBI]
Author :
Sato, Katsuhisa ; Hara, Tadayoshi ; Kuji, Seisuke ; Asari, Kazuyoshi ; Nishio, Masanori ; Kawano, Nobuyuki
Author_Institution :
Mizusawa Astrogeodynamics Obs., Nat. Astron. Obs., Japan
fDate :
2/1/2000 12:00:00 AM
Abstract :
An ultrastable fiber optic frequency distribution system is described. The ultrastable phase stability is achieved by configuring a closed phase-locked loop with a single-mode optical fiber transmission line in which two optical carrier signals with different wavelengths are transmitted as a forward and a backward signal, and installing an optical delay control module which has no differential dispersion effect between the two optical carrier waves and induces no electrical noise. A phase stabilized optical fiber (PSOF) is used for the signal transmission line. The stabilities of this system are 7.5×10-17 and 1.1×10-17 in Allan standard deviation at 1000 and 10000 s averaging time, respectively, while the environmental temperature of the PSOF cable varies as much as the range of 10°C and the rate of 10°C/12 h
Keywords :
frequency stability; frequency standards; optical control; optical delay lines; optical fibre communication; optical phase locked loops; radioastronomical techniques; radiowave interferometry; Allan standard deviation; VLBI system; active control; backward signal; closed phase-locked loop; fiber optic frequency distribution system; forward signal; frequency stability; frequency standard; optical WDM; optical carrier signals; optical delay control module; phase stabilized optical fiber; single-mode optical fiber transmission line; ultrastable phase stability; ultrastable system; Delay effects; Dispersion; Frequency; Optical control; Optical fibers; Optical noise; Phase locked loops; Propagation delay; Stability; Transmission lines;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
