Title :
Achievement of 1 MHz frequency stability of semiconductor lasers by double-loop AFC scheme
Author :
Kikuchi, K. ; Okoshi, T. ; Kawanishi, S.
Author_Institution :
University of Tokyo, Department of Electronic Engineering, Tokyo, Japan
Abstract :
A temperature-controlling AFC system has been developed to realise high-frequency stability with semiconductor lasers. The frequency drift in DC operation can be reduced to below 1 MHz peak-to-peak. When necessary, the laser frequency can be modulated directly in the AFC state while the centre frequency is kept stabilised within 3 MHz. A heterodyne experiment was also performed using two frequency stabilised lasers; a stable IF output could be obtained for 10 min.
Keywords :
automatic frequency control; laser accessories; laser frequency stability; semiconductor junction lasers; 1 MHz frequency stability; automatic frequency control; double-loop AFC scheme; heterodyne experiment; high-frequency stability; semiconductor lasers; temperature controlled system;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19810360
