Xiaoqiong Qin, Zujie Fang, Kang Ying, Fang Wei, Zhaoyong Wang, Qing Ye, Zhengqing Pan, Haiwen Cai, Ronghui Qu. Narrow Linewidth All-Fiber Ring Filters[J]. Acta Optica Sinica, 2018, 38(10): 1006001
- Acta Optica Sinica
- Vol. 38, Issue 10, 1006001 (2018)
Fig. 1. Schematic of filters. (a) Single-ring fiber filter; (b) double-ring fiber filter
Fig. 2. Reflection spectra. (a) Single-ring filter (Rg=0.01, κ2=0.2, L2=48 cm); (b) double-ring filter (Rg=0.01, κ1=0.4, L1=36 cm, κ2=0.9, L2=48 cm)
Fig. 3. Parameter requirements of single-ring filter
Fig. 4. Reflection spectra. (a) Single-ring filter (Rg=0.03, κ2=0.2, L2=48 cm); (b) double-ring filter (Rg=0.03, κ1=0.64, L1=36 cm, κ2=0.75, L2=48 cm)
Fig. 5. Effective group delay. (a) Sing-ring filter; (b) double-ring filter
Fig. 6. Measurement setup of filter’s reflection spectra
Fig. 7. Reflection spectra. (a) Single-ring filter (κ2=0.15, L2=51 cm); (b) double-ring filter (κ1=0.2, L1=60 cm, κ2=0.15, L2=51 cm)
Fig. 8. Reflection spectra. (a) Single-ring filter (Rg=92%, κ=0.15, L=50 cm); (b) double-ring filter (Rg=0.9%, κ1=0.2, L1=84 cm, κ2=0.15, L2=50 cm)
Fig. 9. Narrow linewidth fiber laser with sing-ring filter
Fig. 10. Homodyne beat signals
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