8 September 1995 Polarization spectrum of double-clad fiber lasers
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Abstract
Measurements of the state of polarization of the output of a double-clad fiber laser with relatively large birefringence and dichroism as a function of pump power and externally induced anisotropic stress are reported. The laser field ellipticity and the laser gain dichroism show a sharp modulation across the optical spectrum; this spectral modulation has a characteristic length of 1.75 nm, determined by the fiber core birefringence. The laser output power is partially elliptically polarized with the degree of polarization having a value near zero below and well above laser threshold, and near one close to threshold.
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Luis A. Zenteno, A. B. Boyain, Alejandrina Martinez, Andrey N. Starodumov, "Polarization spectrum of double-clad fiber lasers", Proc. SPIE 2552, Infrared Technology XXI, (8 September 1995); doi: 10.1117/12.218234; https://doi.org/10.1117/12.218234
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KEYWORDS
Fiber lasers

Polarization

Laser damage threshold

Birefringence

Dichroic materials

Laser applications

Modulation

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