Kringlebotn, J.T., Morkel, P.R., Reekie, L., Archambault, J.L. and Payne, D.N.
Efficient diode-pumped single-frequency erbium:ytterbium fibre laser.
IEEE Photonics Technology Letters, 5, (10), . (doi:10.1109/68.248414).
We report a 7.6-mW single-frequency fiber laser operating at 1545 nm, using for the first time an Er3+:Yb3+ doped fiber and a fiber grating output coupler. The laser did not exhibit self-pulsation, which is a typical problem in short three-level fiber lasers, and had a relative intensity noise (RIN) level below -145.5 dB/Hz at frequencies above 10 MHz. The linewidth of the laser was limited by the relaxation oscillation sidebands in the optical spectrum and was typically less than 1 MHz.
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