We have developed single frequency fiber lasers based on highly doped erbium/ytterbium phosphate glass fibers, which have extremely narrow linewidths (< 500 Hz), low relative intensity noise (-170 dB/Hz), low phase noise, and high power directly from the oscillator (> 125mW). These lasers are ideally suited to interferometric fiber optic sensing applications, such as seismic monitoring where it provides a clear picture of the oil reservoir architecture and the location of the remaining oil for oil well management.

© 2011 Optical Society of America

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