Intermodal Four-Wave Mixing Process in Strain-Induced Birefringent Multimode Optical Fibers

被引：1
作者：
Kwasny, Michal [1 ]
Mergo, Pawel [2 ]
Napierala, Marek [3 ]
Markiewicz, Krzysztof [3 ]
Laudyn, Urszula A. [1 ]
机构：
[1] Warsaw Univ Technol, Fac Phys, 75 Koszykowa, PL-00662 Warsaw, Poland
[2] Univ Maria Curie Sklodowska, Lab Opt Fiber Technol, 3 M Curie Sklodowskiej Sq, PL-20031 Lublin, Poland
[3] InPhoTech Sp Zoo, 400 Poznanska, PL-05850 Oltarzew, Poland
来源：
MATERIALS | 2022年 / 15卷 / 16期
关键词：
four-wave mixing; strain-induced birefringence; nonlinear frequency conversion; MODE; GENERATION; DEPENDENCE; EFFICIENCY;
D O I：
10.3390/ma15165604
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Our study investigated the partially degenerate intermodal four-wave mixing (IM-FWM) process in nonlinear multimode optical fibers with strain-induced birefringence. The difference in the refractive index along the two orthogonal directions was due to the photoelastic effect that occurred when the fiber under test (FUT) was subjected to uniformly applied diameter stress caused by winding on a cylinder of a given diameter. Our work analyzed how the nonlinear frequency conversion and the output modal field profiles depended on the degree of birefringence in FUT. The experimental results significantly affected the order of the excited moduli in fiber sections characterized by different amounts of birefringence. We also checked the efficiency of the FWM process for different polarizations of the pump beam to determine those for which the FWM process was most effective for the 532 nm sub-nanosecond pulses. More than 30% conversion efficiency was obtained for the FUTs with a length of tens of centimeters.
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页数：10
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