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

Volume

15

Issue

3

fYear

2003

fDate

3/1/2003 12:00:00 AM

Firstpage

446

Lastpage

448

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2002.807954

Filename

1182786