High dynamic extinction ratio and pulse modulation of optical signals

2nd International School and Conference Saint-Petersburg OPEN on Optoelectronics, Photonics, Engineering and Nanostructures

Petrov, A.^1,2 ; Tronev, A.V.^3 ; Lebedev, V.^1 ; Il'Ichev, I.V.^1 ; Velichko, E.^2,3 ; Shamray, A.^1,2,3

Ioffe Institute, RAS, St.Petersburg, Russia^1

Peter the Great St.Petersburg Polytechnic University, St.Petersburg, Russia^2

Saint-Petersburg National Research University of Information Technologies, Mechanics and Optics, St.Petersburg, Russia^3

关键词: Erbium doped fibers;    External modulation;    Extinction ratios;    High dynamic;    Optical signals;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/643/1/012038/pdf
DOI  :  10.1088/1742-6596/643/1/012038

来源: IOP

【 摘 要 】

The use of a saturable absorber for increasing the extinction ratio at external modulation of optical signals is considered. An erbium doped fiber was used as the saturable absorber in the experiments. A considerable increase in the static extinction ratio (up to 50 dB) was demonstrated. A rather long erbium doped fiber relaxation time (about 10 ms) was a limiting factor in the case of pulse modulation. Ways of overcoming this drawback are discussed.