Lasers, Fiber Optics, and Communications

Theoretical analysis of polarization-coupled mode splitting in a single microfiber knot-ring resonator

[+] Author Affiliations
Weiqia Qiu, Junjie Zhou

Jinan University, Department of Optoelectronic Engineering, College of Science and Technology, West Huangpu Avenue, Guangzhou, Guangdong 510632, China

Jianhui Yu, Heyuan Guan

Jinan University, Department of Optoelectronic Engineering, College of Science and Technology, West Huangpu Avenue, Guangzhou, Guangdong 510632, China

Jinan University, Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Guangzhou, Guangdong 510632, China

Yi Xiao

Jinan University, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Guangzhou, Guangdong 510632, China

Huihui Lu

Jinan University, Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Guangzhou, Guangdong 510632, China

Jinan University, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Guangzhou, Guangdong 510632, China

Yongchun Zhong, Jun Zhang, Zhe Chen

Jinan University, Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Guangzhou, Guangdong 510632, China

Opt. Eng. 55(6), 066108 (Jun 09, 2016). doi:10.1117/1.OE.55.6.066108
History: Received March 19, 2016; Accepted May 17, 2016
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Abstract.  We established a theoretical model for a single knot-ring resonator and investigated the transmission spectrum by Jones matrix. The numerical results show that two orthogonal polarization modes of knot-ring, which are originally resonated at the same wavelength, will split into two resonant modes with different wavelengths. The mode splitting is due to the coupling between the two orthogonal polarization modes in the knot-ring when the twisted angle of the twist coupler is not exactly equal to 2mπ (m is an integer). It is also found that the separation of the mode splitting is linearly proportional to the deviation angle δθ with a high correlation coefficient of 99.6% and a slope of 3.17  nm/rad. Furthermore, a transparency phenomenon analogous to coupled-resonator-induced transparency was also predicted by the model. These findings may have potential applications in lasers and sensors.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Weiqia Qiu ; Junjie Zhou ; Jianhui Yu ; Yi Xiao ; Huihui Lu, et al.
"Theoretical analysis of polarization-coupled mode splitting in a single microfiber knot-ring resonator", Opt. Eng. 55(6), 066108 (Jun 09, 2016). ; http://dx.doi.org/10.1117/1.OE.55.6.066108


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