A dual-wavelength erbium-doped fiber laser with widely tunable wavelength spacing
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Abstract:
A stable dual-wavelength erbium-doped fiber laser (EDFL) with tunable wavelength spacing and equalized output power is proposed and experimentally demonstrated. The fiber laser uses two fiber Fabry-Perot tunable filters (FFPTFs) as the wavelength filter. The main cavity is divided into two sub-cavities with imbalance cavity losses through a 30/70 optical coupler. The tunable wavelength spacing can be achieved by changing the center wavelength of the filters and the equalized dual-wavelength output power can be achieved by properly controlling the variable optical attenuator (VOA) inserted in the lower-loss cavity.
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This work has been supported by the Tianjin Natural Science Foundation （Nos. 13JCQNJC01800 and 11JCYBJC00100）.
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