Nonlinear distortion evaluation in a directly modulated distributed feedback laser diode-based fiber-optic cable television transport system

作者：Li Chung Yi^*; Ying Cheng Ling; Lin Chun Yu; Chu Chien An

来源：Optical Engineering, 2015, 54(12): 126112.

DOI：10.1117/1.OE.54.12.126112

• distributed feedback laser diode
• fiber-optic cable television transport systems
• optical modulation index

This study evaluated a directly modulated distributed feedback (DFB) laser diode (LD) for cable TV systems with respect to carrier-to-nonlinear distortion of LDs. The second-order distortion-to-carrier ratio is found to be proportional to that of the second-order coefficient-to-first-order coefficient of the DFB laser diode driving current and to the optical modulation index (OMI). Furthermore, the third-order distortion-to-carrier ratio is proportional to that of the third-order coefficient-to-first-order coefficient of the DFB laser diode driving current, and to the OMI2.

• 出版日期2015-12