Bandpass Filter Response Through Concatenation of Graded-Index and Step-Index Few-Mode Fibers

被引：6
作者：
Sakata, Hajime [1 ]
Kibune, Takuya [1 ]
Sano, Hiroki [1 ]
机构：
[1] Shizuoka Univ, Grad Sch Integrated Sci & Technol, Dept Elect & Elect Engn, Hamamatsu, Shizuoka 4328561, Japan
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2016年 / 34卷 / 13期
关键词：
Bandpass filers; long-period fiber gratings; microbends; optical fiber filters; OPTICAL-FIBER; BRAGG GRATINGS; PERIOD; DISPERSION; MICROBEND; SPECTRA; STRAIN;
D O I：
10.1109/JLT.2016.2565689
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We propose an all-fiber bandpass filter using a combination of a graded-index few-mode fiber (GI-FMF) and a step-index few-mode fiber (SI-FMF), in which distinct long-period fiber gratings (LPFGs) are formed. The first LPFG in the GI-FMF performs the mode conversion of the LP01 mode to the LP11 mode over broad wavelength range. The second LPFG in the SI-FMF reversely converts the LP11 mode to the LP01 mode at the specific resonance wavelength. Such a sequence of mode transition yields a single passband in the transmission spectrum. Though the tunable periodicity is not crucial to the first LPFG, it is beneficial to the second LPFG for changing the passband wavelength.
引用
收藏
页码：3206 / 3211
页数：6
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