摘要
选用介质膜作谐振腔镜,光纤激光器就缺乏有效的选频机制,使得输出激光线宽较宽,纵模频率和输出功率不够稳定;而光纤光栅作为激光器的谐振腔镜,可以得到稳定的窄线宽激光输出。通过对光纤光栅的形成机理和布拉格光栅选频原理分析,得到双布拉格光纤光栅线型谐振腔的理论。光纤光栅谐振腔的长度与光纤光栅中心波长满足S=(2m-1)λmax/4neff,光纤光栅比介质膜更适合做光纤激光器谐振腔镜。
If used dielectric film as cavity mirrors, the output laser linewidth of fiber laser would be wide, moreover the longitudinal mode frequency and output power are not stable enough because of the lack of effective mechanisms for frequency selection. Using fiber grating as laser cavity mirrors, we can acquire stable, narrow linewidth laser output. Through the analysis of optical fiber bragg grating formation mechanism and the frequency selection principle of bragg grating, dual bragg fiber grating linear cavity theory are obtained.the length of the fiber bragg grating resonator and fiber bragg grating center wavelength meet S=（2m-1λmax/4neff）,fiber grating is moresuitable than dielectric film as cavity mirror.
出处
《重庆师范大学学报（自然科学版）》
CAS
2011年第4期48-52,共5页
Journal of Chongqing Normal University:Natural Science
基金
重庆市科委科技攻关项目(No.8180)
重庆市教委应用基础研究项目(No.KJ060816)
关键词
光纤激光器
光纤光栅
折射率调制深度
耦合模理论
fiber laser
fiber bragg grating
refractive index modulation depth
coupled mode theory
