Orbital angular momentum generation in two mode fiber

Chuancan Liang; Guolu Yin; Tao Zhu

doi:10.1117/12.2522654

14 February 2019 Orbital angular momentum generation in two mode fiber

Chuancan Liang, Guolu Yin, Tao Zhu

Proceedings Volume 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018); 110484J (2019) https://doi.org/10.1117/12.2522654
Event: 17th International Conference on Optical Communications and Networks (ICOCN2018), 2018, Zhuhai, China

Abstract

In this paper, we proposed a new method to generate OAM beams based on modal interference principle in two mode fiber. Micro-waveguides were specially designed to excite and combine the high order mode for realizing the two-mode interference in the two-mode fiber. Advanced femtosecond laser processing technology was employed to inscribed the micro-waveguides at the two ends of the two-mode fiber. After optimizing the waveguide size, an in-line interferometer was successfully realized with a low insertion loss of 1.3 dB and a contrast of higher than 22 dB. Finally, the experimental results demonstrated that the left- and right-handed circularly polarized fundamental mode was successfully converted into the ±1-order OAM beams.

Citation Download Citation

Chuancan Liang, Guolu Yin, and Tao Zhu "Orbital angular momentum generation in two mode fiber", Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110484J (14 February 2019); https://doi.org/10.1117/12.2522654

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