Study on Vernier effect of orthogonal Mach-Zehnder interferometers based on Polarization-maintaining fiber

Chen, Wenhuan; Wang, Jiabin; Liu, Yue; Geng, Tao; Lu, Chupeng; Zeng, Xinzhe; Hao, Jiayu; Zhou, Jian; Yan, Yongde; Yan, Qi; Sun, Weimin

doi:10.1016/j.optlastec.2023.109599

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Considering the birefringence characteristic caused by the tapered composite waveguide, the mode interferences in x and y-polarization will happen in the tapered region. The amplitudes I x and I y of OMIs could be expressed as [25,29]:…”

Section: Experimental Setup and Operation Principlementioning

confidence: 99%

“…where, I x even , I x odd , I y even and I y odd represent the light intensities of the even mode and the odd mode in x and y-polarization, respectively. φ x and φ y denote the accumulated phase differences between the orthogonal interference modes, which can be written as [25,29]:…”

Section: Experimental Setup and Operation Principlementioning

confidence: 99%

“…This phenomenon is due to the overlap between the propagating light of two-beam interferometers with a small detuned frequency. Compared to an individual modal interferometer, optical Vernier devices exhibit enhanced sensing capability through the demodulation of spectral envelopes [25,26]. In order to introduce the optical Vernier envelopes, the typical approach involves placing a reference arm and a sensing arm in parallel or in series [27,28].…”

Section: Introductionmentioning

confidence: 99%

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Vernier-effect-based fiber microcoupler for highly sensitive liquid refractive index sensing

Sun,

Wu,

Song

et al. 2024

Meas. Sci. Technol.

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An orthogonal mode interferometer (OMI) is proposed and experimentally demonstrated for liquid refractive index sensing using the optical Vernier effect. The OMIs are based on weakly fiber microcouplers, which are fabricated by fusing single mode fiber and coreless fiber together. Owing to the birefringent characteristic of the hybrid coupler, the optical Vernier effect is dependent on the overlap of mode interference between the x and y polarizations. Compared to the response of the individual resonance dip, the signal demodulation of the Vernier envelope exhibits more excellent signal amplification capability. Experimental results show that the Vernier envelope of the OMI achieves a refractive index (RI) sensitivity of 22427.03 nm/RIU near the RI of 1.33 with a magnification factor of 4.1. Moreover, with its high sensitivity, flexible design and simplified configuration, our proposed OMI based on the optical Vernier effect is well suitable for a wide range of biosensing applications.

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Section: Experimental Setup and Operation Principlementioning

confidence: 99%

Section: Experimental Setup and Operation Principlementioning

confidence: 99%