Abstract
A tunable erbium-doped fiber (EDF) laser with a cascaded structure consisting of in-line Mach-Zehnder interferometer (MZI) and traditional MZI is proposed. The transmission spectrum of the in-line MZI is modulated by the traditional MZI, which determines the period of the cascaded structure, while the in-line MZI’s transmission spectrum is the outer envelope curve of the cascaded structure’s transmission spectrum. A stable single-wavelength lasing operation is obtained at 1 527.14 nm. The linewidth is less than 0.07 nm with a side-mode suppression ratio (SMSR) over 48 dB. Fixing the in-line MZI structure on a furnace, when the temperature changes from 30 °C to 230 °C, the central wavelength can be tuned within the range of 12.4 nm.
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This work has been supported by the National High Technology Research and Development Program of China (No.2013AA014201), the Tianjin Youth Science Foundation (No.13JCQNJC01800), and the State Key Laboratory on Integrated Optoelectronics of China (No.IOSKL2015KF06).
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Tong, Zr., Yang, H. & Zhang, Wh. Tunable fiber laser based on a cascaded structure consisting of in-line MZI and traditional MZI. Optoelectron. Lett. 12, 437–440 (2016). https://doi.org/10.1007/s11801-016-6183-2
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DOI: https://doi.org/10.1007/s11801-016-6183-2