Title :
Wavelength chirp in a high-κL quarter-wave-shifted DFB laser: characterization and influence on system performance
Author :
Olsen, C.M. ; Izadpanah, H. ; Lin, C.
Author_Institution :
Bellcore, Red Bank, NJ, USA
fDate :
12/1/1990 12:00:00 AM
Abstract :
Time-resolved and time-averaged chirp measurements of a quarter-wave shifted 1.53-μm DFB laser with a high-coupling coefficient are presented, showing a slow-steady shift towards shorter wavelengths lasting 1.5 ns after the laser is turned on. A simple method of screening for this phenomenon is presented. Transmission on a regular single-mode fiber reveals the effect of pattern-dependent pulse compression causing severe performance degradation in a long-haul NRZ (nonreturn-to-zero) system, but improving that of an RZ system
Keywords :
distributed feedback lasers; optical communication equipment; optical testing; semiconductor device testing; semiconductor junction lasers; time resolved spectroscopy; 1.5 ns; 1.53 micron; DFB laser chirp; distributed feedback lasers; high-coupling coefficient; nonreturn-to-zero; pattern-dependent pulse compression; performance degradation; quarter-wave-shifted DFB laser; shorter wavelength lasing; single-mode fiber; system performance; time-averaged chirp measurements; time-resolved wavelength chirp measurements; Cameras; Chirp modulation; Equations; Fiber lasers; Optical coupling; Optical modulation; Optical signal processing; Spectroscopy; System performance; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
