Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5007336 | Optics & Laser Technology | 2018 | 5 Pages |
Abstract
We demonstrate a stable switchable dual-wavelength single longitudinal mode (SLM) narrow linewidth ytterbium-doped fiber (YDF) laser using a nonlinear amplifying fiber loop mirror (NALM) at 1064Â nm. The NALM of intensity-dependent transmission acts as a saturable absorber filter and an amplitude equalizer to suppress mode competition and the fiber Bragg grating (FBG) pair is used as one wavelength selection component. By properly adjusting the polarization controllers (PCs), the switchable dual-wavelength SLM fiber laser can be operated steadily at room temperature. The optical signal-to-noise ratio (OSNR) is better than 50Â dB for both lasing wavelengths. Meanwhile, the linewidth of the fiber laser for each wavelength is approximate 17.07Â kHz and 18.64Â kHz with a 20Â dB linewidth, which means the laser linewidth is approximate 853Â Hz and 932Â Hz FWHM. Correspondingly, the measured relative intensity noise (RIN) is less than â120Â dB/Hz at frequencies over 5.0Â MHz.
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Authors
Pan Fu, Xiao-qiang Feng, Baole Lu, Xin-yuan Qi, Haowei Chen, Bo Sun, Man Jiang, Kaile Wang, Jintao Bai,