Photonic generation of a microwave signal by incorporating a delay interferometer and a saturable absorber

A novel approach to generate microwave signals is presented by employing a dual-wavelength erbium-doped fiber ring laser. By using a delay interferometer as a comb filter cascaded with a tunable bandpass filter and a saturable absorber formed by an unpumped polarization-maintaining erbium-doped fibe...

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Bibliographic Details
Published inOptics letters Vol. 33; no. 6; p. 554
Main Authors Chen, Guojie, Huang, Dexiu, Zhang, Xinliang, Cao, Hui
Format Journal Article
LanguageEnglish
Published United States 15.03.2008
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Summary:A novel approach to generate microwave signals is presented by employing a dual-wavelength erbium-doped fiber ring laser. By using a delay interferometer as a comb filter cascaded with a tunable bandpass filter and a saturable absorber formed by an unpumped polarization-maintaining erbium-doped fiber, a stable wavelength-tunable dual-wavelength single longitudinal-mode laser is achieved. A microwave signal at 20.07 GHz with a linewidth of <25 kHz is demonstrated by beating the two wavelengths at a photodetector.
ISSN:0146-9592
DOI:10.1364/ol.33.000554