Title :
A new method for measuring time-resolved frequency chirp of high bit rate sources
Author :
Laverdiere, Christian ; Fekecs, Andre ; Tetu, Mcihel
Author_Institution :
Centre d´´Opt., Photon. et Laser, Laval Univ., Canada
fDate :
3/1/2003 12:00:00 AM
Abstract :
A new method for measuring time-resolved frequency chirp of a modulated light source at high bit rate is presented. This method uses a Mach-Zehnder interferometer as an optical frequency discriminator. No approximation is made for measuring the intensity and the phase of the source´s optical field. This method allows to perform a precise measurement of the frequency chirp and the /spl alpha/ parameter of a modulated light source at rates above 10 Gb/s. Experimental results demonstrate the use of this technique for measuring the frequency chirp and the /spl alpha/ parameter of a directly modulated distributed-feedback laser at 20 Gb/s.
Keywords :
Mach-Zehnder interferometers; chirp modulation; discriminators; distributed feedback lasers; laser variables measurement; light sources; optical modulation; /spl alpha/ parameter; 10 to 20 Gbit/s; Mach-Zehnder interferometer; directly modulated distributed-feedback laser; high bit rate sources; measurement method; modulated light source; optical field; optical frequency discriminator; precise measurement; time-resolved frequency chirp; Bit rate; Chirp modulation; Frequency measurement; Light sources; Optical crosstalk; Optical filters; Optical interferometry; Optical modulation; Optical pulses; Optical transmitters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.807954
