bandpass characteristics meaning in Chinese

带通特性

( 3 ) ln the fourth chapter of this dissertation , a tunable single - longitudinal - mode erbium doped fiber ring laser is achieved by using the very narrow bandpass characteristics of the self written grating formed in a section of erbium doped flber withoat undergoing pumping by stable standing wave in it . tl1e tunable laser ' s wavelength tuning range is 40nm , from l 523 . 79llm to l563 . 92nm
三、在本文第四章，利用驻波干涉和饱和吸收诱发的自写入光纤光栅的窄带滤波特性及反射波长自适应特性，研制成可调谐掺铒光纤环形腔单频激光器，其波长连续可调谐范围达40nm ( 1523 . 79nm ?安激大学硕士学位论文摘要1563