Linewidth of an externally modulated laser subjected to Rayleigh backscattering from a fiber
- 1 April 1990
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 2 (4) , 239-241
- https://doi.org/10.1109/68.53248
Abstract
It is found that the linewidth of a semiconductor laser that is externally phase modulated and connected to a fiber with Rayleigh backscattering is broadened. At low modulation rates the linewidth can be several orders of magnitude greater than the free-running linewidth, but it converges to the free-running linewidth at sufficiently high modulation rates. As a result, the isolation needed to attain a specific linewidth can be calculated.Keywords
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