TY - JOUR
T1 - Simple structure dual-core photonic crystal fiber polarization beam splitter covering the O + E + S + C + L + U band based on the surface plasmon resonance effect
AU - Qu, Yuwei
AU - Yuan, Jinhui
AU - Qiu, Shi
AU - Zhou, Xian
AU - Yan, Binbin
AU - Wu, Qiang
AU - Liu, Bin
AU - Wang, Kuiru
AU - Sang, Xinzhu
AU - Long, Keping
AU - Yu, Chongxiu
N1 - Funding Information: National Key Research and Development Program of China (2019YFB2204001).
PY - 2021/12/1
Y1 - 2021/12/1
N2 - In this paper, a simple structure dual-core photonic crystal fiber (SS-DC-PCF) polarization beam splitter (PBS) based on the surface plasmon resonance (SPR) effect and symmetric dual-core coupling mode theory is proposed. For the proposed SS-DC-PCF-1 PBS, the coupling lengths (CLs) and coupling length ratio (CLR) are analyzed, and the variations of the normalized output powers with the propagation length are investigated for the chosen wavelengths 1.434, 1.451, and 1.469 μm. The extinction ratio in cores A and B are compared at the three splitting lengths (SLs) 170, 173, and 176 μm. When the optimal SL is 176 μm, the splitting bandwidth (SB) is 255 nm (1.437-1.692 μm), and the insertion loss (IL) is less than 0.043 dB. The regulations of the CLs and CLR with the change of the structure parameters are analyzed. For the proposed SS-DC-PCF-2 PBS, the optimal SL is 232 μm, the SB is 201 nm (1.249-1.450 μm), and the IL is less than 0.042 dB. Finally, it is demonstrated that the total SB of the proposed SS-DC-PCF-1 PBS and SS-DC-PCF-2 PBS is 443 nm (1.249-1.692 μm), which can cover the OCECSCCCLCU band, even if the gold film thickness changes by μ1 nm. The proposed SS-DC-PCF PBS has excellent performances, such as ultrashort SL, ultrawide SB, ultralow IL, and good error-tolerance rate. It will have important applications in all-fiber optical systems.
AB - In this paper, a simple structure dual-core photonic crystal fiber (SS-DC-PCF) polarization beam splitter (PBS) based on the surface plasmon resonance (SPR) effect and symmetric dual-core coupling mode theory is proposed. For the proposed SS-DC-PCF-1 PBS, the coupling lengths (CLs) and coupling length ratio (CLR) are analyzed, and the variations of the normalized output powers with the propagation length are investigated for the chosen wavelengths 1.434, 1.451, and 1.469 μm. The extinction ratio in cores A and B are compared at the three splitting lengths (SLs) 170, 173, and 176 μm. When the optimal SL is 176 μm, the splitting bandwidth (SB) is 255 nm (1.437-1.692 μm), and the insertion loss (IL) is less than 0.043 dB. The regulations of the CLs and CLR with the change of the structure parameters are analyzed. For the proposed SS-DC-PCF-2 PBS, the optimal SL is 232 μm, the SB is 201 nm (1.249-1.450 μm), and the IL is less than 0.042 dB. Finally, it is demonstrated that the total SB of the proposed SS-DC-PCF-1 PBS and SS-DC-PCF-2 PBS is 443 nm (1.249-1.692 μm), which can cover the OCECSCCCLCU band, even if the gold film thickness changes by μ1 nm. The proposed SS-DC-PCF PBS has excellent performances, such as ultrashort SL, ultrawide SB, ultralow IL, and good error-tolerance rate. It will have important applications in all-fiber optical systems.
UR - http://www.scopus.com/inward/record.url?scp=85116715180&partnerID=8YFLogxK
U2 - 10.1364/JOSAB.435068
DO - 10.1364/JOSAB.435068
M3 - Article
AN - SCOPUS:85116715180
SN - 0740-3224
VL - 38
SP - F50-F60
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
IS - 12
ER -