摘要
研究了一种基于线性啁啾光纤布拉格光栅(LCFBG)和热光相移技术的可编程带宽波长独立可调光纤光栅滤波器,透射峰数目、带宽、中心波长及波长间隔独立可调。由于热光效应,对LCFBG局部区域进行加热便可在加热处引入相移,使LCFBG透射禁带上产生透射峰。采用可编程的热打印头作为数字化加热单元,精确加热光纤光栅的特定位置,通过控制加热区域的数目和加热区域的间隔来分别确定透射波长的数目和透射波长的间隔;通过改变LCFBG被加热区域的宽度,实现可变带宽滤波。此可编程带宽波长独立可调光纤光栅滤波器的透射峰带宽调谐范围为0.07～1.55nm,透射峰中心波长调谐范围为1547.44～1558.64nm,两透射峰间距最小为0.95nm。
A programmable bandwidth-tunable and wavelength-variable hber grating triter based on a nnearly cnlrpea fiber Bragg grating （LCFBG） and thermal-optical phase shift technique is proposed. The number of transmission peaks, filter bandwidth, central wavelength and wavelength spacing can be adjusted independently. Due to the thermo-optical effect, a phase shift can be induced along the LCFBG by heating a small portion of the LCFBG, then a transmission peak can be obtained within the stop band. The specific location of fiber grating is accurately heated by using a thermal printer head as a digital heating unit. The number of the transmission peaks and the wavelength spacing can be set by changing the number and the spacing of the heating points, respectively. And the peak＇ s bandwidth can be tuned by changing the width of the heating region. Tunable bandwidth of transmission peak between 0.07 nm and 1.55 nm, central wavelength of transmission peak ranging from 1547.16 nm to 1558.64 nm and the minimum wavelength spacing of 0.95 nm can be achieved using this filter.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2013年第7期58-64,共7页
Acta Optica Sinica
基金
国家863计划(SS2012AA010407)
国家自然科学基金(61107087)
关键词
光纤光学
可编程滤波器
热光相移
热打印头
fiber optics
programmable filter
thermal-optical phase shift
thermal printer head
