Title :
Optical phase-locked loop with fibre lasers for low phase noise millimetre-wave signal generation
Author :
Hyodo, Masaharu ; Saito, Sakuyoshi ; Kasai, Y.
Author_Institution :
Kobe Adv. ICT Res. Center, Nat. Inst. of Inf. & Commun. Technol., Kobe, Japan
Abstract :
An optical phase-locked loop (OPLL) using two continuous-wave commercial fibre lasers was implemented by means of pump power modulation. Although the 3 dB bandwidth of the frequency modulation transfer function of a fibre laser was measured to be approximately 6 kHz, the control bandwidth of the loop was extended by a factor of 10 using electronic phase-lead compensation. The operation of our OPLL was stable with a residual RMS phase fluctuation of 57 mrad. By using this technique, the photonic generation of millimetre-wave signals up to 64 GHz was successfully demonstrated.
Keywords :
fibre lasers; low-power electronics; optical phase locked loops; optical transfer function; phase noise; signal generators; electronic phase-lead compensation; fibre lasers; frequency modulation transfer function; low phase noise millimetre-wave signal generation; optical phase-locked loop; pump power modulation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.0801