A widely tunable narrow linewidth semiconductor fiber ring laser

Zhou, Deyu and Prucnal, Paul R. and Glesk, Ivan (1998) A widely tunable narrow linewidth semiconductor fiber ring laser. IEEE Photonics Technology Letters, 10 (6). pp. 781-783. ISSN 1041-1135

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Abstract

We have demonstrated a novel approach to obtain a 0.1-nm line width laser with 38-dB sidemode suppression by utilizing a 1.3-μm semiconductor optical amplifier in a fiber unidirectional ring that consists of a linear polarizer and polarization controllers. The laser has a low-threshold current of 22.5 mA as well as a widely tuning range of 28 nm. The new approach is applicable to the 1.55-μm region as well. It is expected that nanosecond wavelength tuning speed is feasible using this approach in conjunction with fast electrooptic polarization controllers, short cavities and low-cavity losses.