Abstract
Phase noise is a critical issue for the sensitivity of the interferometric gravitational-wave detector Laser Interferometer Space Antenna that requires laser sources with of output power. A low-power seed laser with a subsequent fiber amplifier is in discussion, and we report on spectrally resolved phase-noise measurements of an ytterbium-doped fiber amplifier emitting of output power from of seed power. Phase-noise measurements for Fourier frequencies from to show at and at . This measured excess phase noise is orders of magnitude below the free-running phase noise of nonplanar ring oscillators.
© 2005 Optical Society of America
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