A new method for measuring time-resolved frequency chirp of high bit rate sources

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 fi...

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Bibliographic Details
Published in:IEEE photonics technology letters 2003-03, Vol.15 (3), p.446-448
Main Authors: Laverdiere, C., Fekecs, A., Tetu, M.
Format: Article
Language:English
Subjects:
Approximation
Bit rate
Chirp
Chirp modulation
Discriminators
Frequency measurement
Lasers
Light sources
Mach-Zehnder interferometers
Mathematical analysis
Optical crosstalk
Optical filters
Optical frequency
Optical interferometry
Optical modulation
Optical pulses
Optical transmitters
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Summary: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.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2002.807954