Analysis of wavelength conversion using highly nondegeneratefour-wave mixing in Λ/4-shifted DFB lasers

摘要

We present a theoretical analysis of terahertz-range wavelengthnconversion using highly nondegenerate four-wave mixing in Λ=1.55nΜm, medium-coupling Λ/4-shifted distributed feedback (DFB)nlasers. Based on the coupled-wave approach, our model predicts up to ~2nTHz probe-pump detuning with a -20 dB or higher conversion efficiencynfor quantum-well Λ/4-shifted DFB. The influences of pump powernand DFB coupling strength (ΚL) on wave mixing as well as the Braggnreflection effects are discussed. The predictions of the model are foundnto be in good agreement with recent experimental observations