Title :
Measured dynamic linewidth properties of a 1.5 μm DFB-grin-rod coupled-cavity laser under direct high-frequency modulation
Author :
Lee, T.P. ; Menocal, S.G.
Author_Institution :
Bell Communications Research, Murray Hill, USA
Abstract :
The DFB laser with a graded-index-rod external cavity has exhibited linewidth as narrow as 2 MHz at 1 mW with CW excitation. The linewidth remained narrow under direct frequency modulation with β ≪ 0.6 but broadened for large β. A frequency deviation of 200 MHz/mA has been measured at 1.7 GHz modulation frequency.
Keywords :
distributed feedback lasers; frequency modulation; gradient index optics; integrated optics; laser cavity resonators; optical communication equipment; optical modulation; semiconductor junction lasers; spectral line breadth; 1.5 micron wavelength; 1.7 GHz; DFB laser; FM; GRIN-rod coupled-cavity laser; direct high-frequency modulation; dynamic linewidth properties; graded-index-rod external cavity; integrated optics; optical communication equipment; semiconductor lasers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850743
