C. Zhang, J. F. Zhao*, and C. Y. Miao
School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin, 300387 China
*e-mail: johnfar@163.com
Received April 9, 2012; published online September 3, 2012
Abstract—A stable dual-wavelength erbium-doped fiber ring laser with switchable spacing is proposed and
experimentally demonstrated. An arrayed waveguide grating (AWG) incorporating two fiber optic switches
(OS) is used to as the wavelength selector. The ring cavity is divided into two cavities by a 30:70 optical coupler.
Equalized dual-wavelength outputs are achieved by controlling the variable optical attenuator (VOA) inserted
in the lower loss cavity. The wavelength spacing can be tuned from 0.80 to 12.05 nm. The fiber laser has good
optical quality with maximum power fluctuation of 1.5 dB and side mode suppression ratios (SMSRs) higher
than 71 dB.
DOI: 10.1134/S1054660X12100295
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