title: Measurement of the linewidth enhancement factor based on nonlinear polarization rotation of semiconductor optical amplifier.
abstract: A simple measurement scheme of the linewidth enhancement factor based on the nonlinear polarization rotation of a semiconductor optical amplifier is proposed. Considering the polarization dependent gain, the relationship between the linewidth enhancement factor and the Stokes vector was derived theoretically. It is proven that the linewidth enhancement factor can be calculated directly from the Stokes parameters without any other assistant measurement system. The results demonstrate that the linewidth enhancement factor varies in a small range from 10.5 to 8.5 for TE mode and from 8.2 to 5.8 for TM mode, respectively, when the input optical power varies from 50 μW to 1 mW and the bias current varies from 90 to 170 mA.
authors.forename: Guodong
authors.initials: G
authors.lastname: Liu
authors.forename: Chongqing
authors.initials: C
authors.lastname: Wu
authors.forename: Fu
authors.initials: F
authors.lastname: Wang
authors.forename: Tianyong
authors.initials: T
authors.lastname: Zhang
authors.forename: Chao
authors.initials: C
authors.lastname: Shang
authors.forename: Kaiqiang
authors.initials: K
authors.lastname: Gao