Title :
Measurement of real-time gain gratings in erbium-doped fiber
Author :
Boothroyd, Simon A. ; Skirtach, Andrei ; Chan, Les ; Akmaloni, Akmal
Author_Institution :
Inst. for Nat. Meas. Stand., Nat. Res. Council of Canada, Ottawa, Ont., Canada
fDate :
1/1/1999 12:00:00 AM
Abstract :
Experimental and theoretical results for nonlinear wave mixing in a pumped erbium-doped fiber are presented where a fast phase transient is applied to one of the beams. The ratio of the imaginary part to the real part of the complex nonlinear refractive index is determined from the initial phase of the beam coupling. The fast phase transient is applied for the first time to measure the response time of index gratings in a nonlinear device. We show that the grating lifetime depends on both the pump and amplified signal beams and that the nonlinear index change occurs with a time constant of the order of 100 μs for CW conditions in a highly doped fiber
Keywords :
diffraction gratings; erbium; multiwave mixing; optical fibre testing; optical pumping; refractive index; 100 mus; CW conditions; amplified signal beams; beam coupling; complex nonlinear refractive index imaginary part; complex nonlinear refractive index real part; erbium-doped fiber; fast phase transient; grating lifetime; highly doped fiber; index gratings; nonlinear index change; nonlinear wave mixing; pump beams; pumped erbium-doped fiber; real-time gain gratings; response time; time constant; Delay; Erbium; Fiber gratings; Gain measurement; Laser excitation; Nonlinear optical devices; Optical fiber devices; Optical fiber sensors; Optical mixing; Refractive index;
Journal_Title :
Quantum Electronics, IEEE Journal of
