Compact spot-size converter for low-loss coupling and miniaturization of interferometric fiber optic gyroscopes

Yao, Junjie; She, Xuan; Li, Bei; Wang, Chenge; Chen, Kan; Huang, Tenchao; Shu, Xiaowu

doi:10.1016/j.optcom.2019.07.048

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…As depicted in Fig. 7(a), the total coupling efficiency remains almost constant regardless of the variations in WEWG, which can be used for applications based on wide waveguides like gyroscopes and accelerometers [37], [38]. Notably, the end of the taper tip is elongated for improving the cleaving tolerance, and the length of the tip waveguide (LTWG) negligibly affects the performance, as shown in Fig.…”

Section: Fabrication and Characterization Of The Proposed Couplermentioning

confidence: 97%

Compact and Broadband Edge Coupler Based on Multi-Stage Silicon Nitride Tapers

Bhandari

Lee

et al. 2020

IEEE Photonics J.

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We have proposed and experimentally realized an ultra-compact and broadband silicon nitride edge-coupler that enables high coupling efficiency. The proposed coupler was realized by concatenating short tapers in four stages, whose angles were designed to minimize the footprint while preserving the coupling efficiency. The constituting taper segments were designed by carefully sectioning a long adiabatic taper while adapting to an appropriate taper angle for each segment. The designed coupler exhibited an extremely short footprint of 76 μm. A coupling efficiency of 92% was experimentally attained at 1550 nm wavelength when coupled to a single-mode fiber having a mode field diameter of ~4 μm. Further, an efficiency of over 90% throughout the C and L bands was observed. A 3-dB bandwidth of 965 nm, spanning λ =1015-1980 nm, was achieved in the simulation. Additionally, the fabricated device exhibited an enhanced cleaving tolerance by virtue of its elongated tip, along with relaxed alignment tolerances ranging up to 3.5 μm. The proposed design was also found to comply with the waveguides having widths between 1 μm and 4 μm without affecting the overall footprint and efficiency. This work is anticipated to provide a promising foundation for the development of compact photonic devices.

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Section: Fabrication and Characterization Of The Proposed Couplermentioning

confidence: 97%

Compact and Broadband Edge Coupler Based on Multi-Stage Silicon Nitride Tapers

Bhandari

Lee

et al. 2020

IEEE Photonics J.

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“…The optical signal transmission between the chips needs to be implemented through the optical fiber. Therefore, optical couplers have become basic devices for photonic integration [ 3 , 4 ]. In the preparation of highly integrated optical modules, the direct coupling of the optical fiber and waveguide will lead to a huge mode mismatch loss and reduce the coupling efficiency.…”

Section: Introductionmentioning

confidence: 99%

Fiber-to-Chip Three-Dimensional Silicon-on-Insulator Edge Couplers with High Efficiency and Tolerance

Chen

2023

Micromachines

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The edge coupler is an indispensable optical device for connecting an external fiber and on-chip waveguide. The coupling efficiency of the edge coupler affects the effective integration of optical circuits. In this study, three-dimensional (3D) edge couplers with high efficiency and tolerance are proposed. The high coupling efficiency of the 3D edge couplers is verified by theoretical calculations. Three couplers are fabricated on a thick-silicon platform via 3D grayscale lithography. At the 1550 nm band, the fiber-to-chip experimental data show that the maximum coupling efficiencies of the three edge couplers are 0.70 dB and 1.34 dB, 0.80 dB and 1.60 dB, and 1.00 dB and 1.14 dB for the TE and TM modes, respectively. At the 1550 nm band, misalignment tolerances measurement data reveal 0.8 dB/0.9 dB tolerance of ±5 μm in the horizontal direction, and 1.7 dB/1.0 dB tolerance of ±2 μm in the vertical direction for TE/TM mode. This study provides a new idea for the design of 3D edge couplers and demonstrates significant superiority in research and industrial applications.

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Parameter optimization for noise performance in time-division multiplexing fiber optic gyroscopes

Song

Jin

2022

Optik

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Compact spot-size converter for low-loss coupling and miniaturization of interferometric fiber optic gyroscopes

Cited by 5 publications

References 14 publications

Compact and Broadband Edge Coupler Based on Multi-Stage Silicon Nitride Tapers

Compact and Broadband Edge Coupler Based on Multi-Stage Silicon Nitride Tapers

Fiber-to-Chip Three-Dimensional Silicon-on-Insulator Edge Couplers with High Efficiency and Tolerance

Parameter optimization for noise performance in time-division multiplexing fiber optic gyroscopes

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