Linewidth reduction by coupled phase-shift distributed-feedback lasers
- 10 September 1987
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 23 (19) , 1014-1015
- https://doi.org/10.1049/el:19870711
Abstract
A coupled phase-shift distributed-feedback structure is proposed to achieve narrow-linewidth laser emission. Its mode properties are analysed and the narrowest linewidth is calculated taking into account the spatial hole burning effect. It is found that, by coupling two DFB laser units, the linewidth can be made as narrow as 0.1 MHz, which is an order of magnitude improvement over the value for the conventional distributed-feedback laser structure.Keywords
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