Abstract

A compact, low-noise, single-frequency fiber laser by using a newly developed Yb3+ heavily doped single-mode phosphate glass fiber has been demonstrated. Over 400mW stable continuous wave single transverse and longitudinal mode laser at 1.06μm was achieved from a 0.8cm long active fiber. The measured slope efficiency and estimated quantum efficiency of laser emission are 72.7% and 93%, respectively. The signal-to-noise ratio is higher than 72dB, and the linewidth of the fiber laser is less than 7kHz, while the measured relative intensity noise is less than 130dB/Hz at frequencies of over 1.5MHz.

© 2011 Optical Society of America

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