270–360 GHz tunable beat signal light generator for photonic local oscillator
- 18 July 2002
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 38 (15) , 795-797
- https://doi.org/10.1049/el:20020578
Abstract
A new millimetre- and submillimetre-wave generation method is proposed. The method employs three techniques, namely the modulation of CW light by an electroabsorption modulator, pulse spectrum expansion through higher-order soliton compression, and spectrum filtering by using tunable fibre Bragg gratings. With this method, a continuously tunable beat signal from 270 to 360 GHz with no frequency fluctuation was obtained experimentally. In addition, the method requires only one laser source, and generates a beat spectrum with a linewidth of less than 10 Hz. By using optical filters with a sufficiently wide tuning range, it is possible to generate a beat signal at any frequency from 100 GHz to 1 THz.Keywords
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