Title :
Measurement of direct frequency modulation characteristics of DFB-LD by delayed self-homodyne technique
Author :
Ryu, Sang-Burm ; Yamamoto, Seiichi
Author_Institution :
KDD Research & Development Laboratories, Tokyo, Japan
Abstract :
The direct frequency modulation characteristics of a DFB-LD can be simply measured by means of a delayed selfhomodyne method using a single-mode fibre delay line and a single-mode fibre coupler. This measuring method has the features of simple set-up and high resolution when narrow-linewidth optical sources are used, compared to the conventional interferometric methods. Direct frequency modulation characteristics of a DFB-LD in the 1.55 ¿m region are measured, and the results obtained agree well with those by a Fabry-Perot interferometer.
Keywords :
distributed feedback lasers; frequency modulation; laser variables measurement; optical modulation; semiconductor junction lasers; 1.55 micron; 1.55 micron region; DFB laser diode; FM; delayed self-homodyne technique; direct frequency modulation characteristics; fibre coupler; high resolution; measuring method; narrow-linewidth optical sources; semiconductor lasers; single-mode fibre delay line;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860721
