Title :
Optical sweeper with double-heterodyne frequency-locked loop
Author :
Ishida, 0. ; Toba, H. ; Kano, F.
Author_Institution :
NTT Transmission Syst. Labs., Kanagawa, Japan
Abstract :
An optical sweeper is constructed with a 1.5 mu m distributed Bragg reflector (DBR) laser for quick frequency-response measurement of high-speed optical receivers. The laser is successfully controlled over a 16 GHz tuning-range by using a double-heterodyne frequency-locked loop. S/N-improved measurement is also demonstrated at sweep speeds as fast as 1 GHz/s.
Keywords :
distributed Bragg reflector lasers; frequency response; laser beam applications; laser tuning; optical communication equipment; receivers; semiconductor junction lasers; 1.5 micron; 16 GHz; communication equipment testing; distributed Bragg reflector; double-heterodyne frequency-locked loop; frequency-response measurement; high-speed optical receivers; semiconductor lasers; tuning-range;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19891003
