SINGLE-FREQUENCY THULIUM-DOPED DISTRIBUTED-FEEDBACK FIBER LASER
A. D. Vladimirskaya1,2, M. I. Skvortsov2, A. A. Wolf2, I. A. Lobach2, S. I. Kablukov2
1Novosibirsk State Technical University, Novosibirsk, Russia
2Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: волоконные лазеры, одночастотное излучение, ВБР, fiber lasers, single frequency generation, FBG
Abstract
A single-frequency thulium-doped distributed-feedback fiber laser is demonstrated. A laser cavity based on a 36 mm long π-phase-shifted fiver Bragg grating (FBG) is inscribed in a heavily doped Tm fiber. Single-frequency radiation with a wavelength of 1919 nm and the maximum output power of 80 mW is generated at the 1.1 W pump power. The lasing linewidth is measured to be about 70 kHz. The relative intensity noise does not exceed 70 dB/Hz with the maximum at a frequency of 1.2 MHz.
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