阶跃折射率 meaning in Chinese

step-refraction index

In optical fiber aspect , the incident beam can be collimated , converted and focused by some kinds of lenses , making the mode of incident beam matched with or near the optical fiber ’ s modes . in this thesis , thorough theoretical analyses and experimental investigations were made for the external optical properties of a 980nm high - power tunnel junction regenerated multi - active - region quantum well stripe - geometry algaas / gaas / ingaas ld and three different stripe - width 980nm high - power
本论文围绕本实验室研发的新型隧道再生多有源区980nmalgaas / gaas / ingaas量子阱大功率半导体激光器和多种条宽的单有源区980nmalgaas / gaas / ingaas量子阱大功率半导体激光器的光场外特性、单模阶跃折射率光纤和多模渐变折射率光纤的模场特性进行了深入的理论分析和实验研究。