All-optical signal gating using ytterbium-doped fiber and a pair of thermally expanded core fibers

Linh Viet Nguyen; Youngjoo Chung
October 2009
Applied Physics Letters;10/19/2009, Vol. 95 Issue 16, p161111
Academic Journal
We report all-optical signal gating using ytterbium-doped fiber (YDF) and a pair of thermally expanded core fibers (TECFs). Splicing the YDF with two TECFs at their expanded-core ends, we obtained an interference pattern in the transmission spectrum of the device. When pumped by a laser diode at 980 nm, the interference fringes shift to longer wavelength due mainly to the resonantly enhanced nonlinearity of the YDF. Consequently, signals within the interference pattern can be gated or blocked all optically. Full gating of cw signals at 1564.21 and 1564.54 nm were obtained using a pump power of about 38.44 mW.


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