The intensity-noise properties and polarization dynamics of a two-polarization Er:Yb codoped fiber laser are investigated and discussed. For a laser without polarization control, the low-frequency relative intensity noise reaches a minimum of approximately -90 dB/Hz. Polarization-sensitive detection reveals that the low-frequency intensity noise is influenced by a strong resonance associated with anticorrelated intensity fluctuations of the orthogonal linearly polarized modes. The frequency of the resonance varies linearly with laser power and leads to an increase in low-frequency noise of more than 45 dB for the polarized output of the laser.
© 2004 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2380) Fiber optics and optical communications : Fiber optics sources and detectors
(060.2410) Fiber optics and optical communications : Fibers, erbium
Kevin Croussore, Daniel C. Kilper, and M. Yasin Akhtar Raja, "Polarization-resolved intensity noise in erbium-ytterbium codoped fiber lasers," J. Opt. Soc. Am. B 21, 865-870 (2004)