A Novel Behavior of Pump Power in the Instability Induced Supercontinuum Generation of Saturable Nonlinear Media

23rd Congress of the International Commission for Optics

Nithyanandan, K.^1 ; Porsezian, K.^1

Department of Physics, Pondicherry University, Puducherry, India^1

关键词: Effective nonlinearities;    Modulational instability;    Non-linear media;    Pump power;    Saturable nonlinearity;    Saturation power;    Spectral broadening;    Super continuum;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/605/1/012031/pdf
DOI  :  10.1088/1742-6596/605/1/012031

来源: IOP

【 摘 要 】

We investigate the modulational instability (MI) induced Supercontinuum generation (SCG) in exponential saturable nonlinearity. The pump power (P) is observed to behave in a unique way such that unlike the conventional Kerr case, the effective nonlinearity of saturable nonlinear system does not monotonously increases with an increase in power. The supercontinuum is observed at the shortest distance of propagation at power equal to the saturation power (Ps), whereas for all combinations of powers (P sor P > Ps) spectral broadening occurs at longer distance.