Title :
Observation of chirp in a 1.5 μm DFB-LD using a streak camera
Author :
Kuwazuru, M. ; Yamamoto, Seiichi ; Mochizuki, K. ; Fujise, M.
Author_Institution :
KDD Research & Development Laboratories, Tokyo, Japan
Abstract :
The transient wavelength shift of a 1.5 μm distributed-feedback laser diode (DFB-LD) modulated by a rectangular pulse is directly observed using a streak camera. As a result, chirp width increase with decreasing DC bias current is observed. When the DC bias current is set to less than the threshold current, the wavelength shifts briefly from the shorter wavelength to the equilibrium value during the optical pulse turn-on.
Keywords :
distributed feedback lasers; optical modulation; semiconductor junction lasers; spectral line breadth; streak photography; DC bias current; chirp; distributed-feedback laser diode; modulation; optical pulse turn-on; rectangular pulse; semiconductor laser; streak camera; threshold current; transient wavelength shift; wavelength 1.5 microns;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860075
