Cascaded Raman fiber lasers with ultrahigh spectral purity

Random distributed feedback (RDFB) cascaded Raman fiber lasers (CRFLs) are simple, wavelength agile, and enable high-power fiber lasers outside emission bandwidths of rare-earth doped fiber lasers. However, the spectral purity, defined as the percentage of total output power in the desired Stokes wa...

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Bibliographic Details
Published in:Optics letters 2022-07, Vol.47 (14), p.3499-3502
Main Authors: Deheri, Rashmita, Dash, Sarthak, Supradeepa, V. R., Balaswamy, V.
Format: Article
Language:English
Subjects:
Conversion
Doped fibers
Fiber lasers
Noise intensity
Purity
Raman lasers
Rare earth elements
Relative intensity noise
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Summary:Random distributed feedback (RDFB) cascaded Raman fiber lasers (CRFLs) are simple, wavelength agile, and enable high-power fiber lasers outside emission bandwidths of rare-earth doped fiber lasers. However, the spectral purity, defined as the percentage of total output power in the desired Stokes wavelength band, and relative intensity noise (RIN) of these systems are limited due to the intensity noise of the pump source used for Raman conversion. RIN gets amplified and transferred to Raman Stokes orders which causes incomplete Raman conversion and hence limits the spectral purity. Here, we demonstrate a low-intensity noise (
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.463950