We propose and demonstrate single- and multiple-passband fiber grating transmission filters that are remotely tunable by exploitation of the optical pump-induced thermal effects in Er/Yb-codoped fiber sections. A repeatable, wavelength-independent induced phase shift of 0.1π/mW is obtained without hysteresis and anisotropic effects. A transmission extinction ratio of >23 dB with a 3-mW change in pump power is achieved.
© 2003 Optical Society of America
(050.2770) Diffraction and gratings : Gratings
(050.5080) Diffraction and gratings : Phase shift
(060.2340) Fiber optics and optical communications : Fiber optics components
(190.4870) Nonlinear optics : Photothermal effects
Yicheng Lai, W. Zhang, L. Zhang, J. A. R. Williams, and I. Bennion, "Optically tunable fiber grating transmission filters," Opt. Lett. 28, 2446-2448 (2003)