A novel tunable chirped fiber Bragg grating technology is proposed and simulated numerically by Matlab. If we adhere a uniform fiber grating with super magnetostrictive film and expose them in a non-uniform magnetic f...A novel tunable chirped fiber Bragg grating technology is proposed and simulated numerically by Matlab. If we adhere a uniform fiber grating with super magnetostrictive film and expose them in a non-uniform magnetic field, the period of the grating can be changed with the strain imposed on it by the magnetostrictive effect .The chirped characteristics can be tuned by changing the magnetic filed which is very flexible in designing.展开更多
According to the perturbation theory, the coupled-mode equations for guided optical waves in the magneto-optical fiber Bragg gratings （MFBGs） under non-uniform magnetic field are derived. The equivalent relation bet...According to the perturbation theory, the coupled-mode equations for guided optical waves in the magneto-optical fiber Bragg gratings （MFBGs） under non-uniform magnetic field are derived. The equivalent relation between the magnetically- induced non-uniform fiber Bragg grating （MuFBG） and the corresponding non-magnetic chirped grating is expressed and verified by the piecewise-uniform MFBG model under linear magnetic field. On the basis of the equivalent relation, the MnFBGs can be effectively investigated by means of simulations. The characteristics of the MnFBGs under three typical magnetic field distributions with application to optical pulse compression are simulated, and the minimal pulse width can be achieved for the same magneto-optical coupling parameter of 2.2 ×10^3 m^-1.展开更多
文摘A novel tunable chirped fiber Bragg grating technology is proposed and simulated numerically by Matlab. If we adhere a uniform fiber grating with super magnetostrictive film and expose them in a non-uniform magnetic field, the period of the grating can be changed with the strain imposed on it by the magnetostrictive effect .The chirped characteristics can be tuned by changing the magnetic filed which is very flexible in designing.
基金supported by the National High Technology Research and Development Program of China (No.2009AA01Z216)the National Basic Research Program of China (No.2011CB301703)the Program for New Century Excellent Talents in University (No.NCET-2008)
文摘According to the perturbation theory, the coupled-mode equations for guided optical waves in the magneto-optical fiber Bragg gratings （MFBGs） under non-uniform magnetic field are derived. The equivalent relation between the magnetically- induced non-uniform fiber Bragg grating （MuFBG） and the corresponding non-magnetic chirped grating is expressed and verified by the piecewise-uniform MFBG model under linear magnetic field. On the basis of the equivalent relation, the MnFBGs can be effectively investigated by means of simulations. The characteristics of the MnFBGs under three typical magnetic field distributions with application to optical pulse compression are simulated, and the minimal pulse width can be achieved for the same magneto-optical coupling parameter of 2.2 ×10^3 m^-1.
