The Er-doped concentric-cores dispersion compensating fiber (EDDCF) has been demonstrated. The rare earth has been doped as a ring around the inner core. We have obtained 14-dB gain at 1550 nm (using 100-mW pump power and 980-nm wavelength) with dispersion of about -165 ps/(km.nm). It is useful for the optical fiber network where amplification as well as negative dispersion are necessary.
© 2005 Chinese Optics Letters
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2410) Fiber optics and optical communications : Fibers, erbium
Pramod R. Watekar, M. L. N. Goswami, H. N. Acharya, J. C. Biswas, and B. P. Pal, "Er-doped concentric-cores optical fiber for simultaneous amplification and compensation of positive dispersion," Chin. Opt. Lett. 2, 12-14 (2004)