SU8 3D prisms with ultra small inclined angle for low-insertion-loss fiber/waveguide interconnection

Nguyen, Minh-Hang; Chang, Chia-Jung; Lee, Ming-Chang; Tseng, Fan‐Gang

doi:10.1364/oe.19.018956

Cited by 11 publications

(7 citation statements)

References 16 publications

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“…With the overlap interface, light is coupled from SU8 prism to SOI WG not only via tight cross-section face, but also through the SU8 overlap on SOI WG's surface. Experimentally, if the SU8 overlap's edge on SOI WG has near zero-height, light coupling can be reached close to simulation result (the method for fabrication of prism with zero-height edge is presented in our work [6]). …”

Section: Iib Coupling Possibilities and Lossessupporting

confidence: 74%

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A novel simple 3D SU8 prism-SOI waveguide interface for light coupling improvement

Nguyen

et al. 2014

2014 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3m-Nano)

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This paper presents optimized structural interface between 3D SU8 prism and SOI waveguide for reduced coupling loss at the interface, hence increasing light transmission efficiency over the system. The coupling loss reduced to 10 % at each optimized interface thanks to SU8 overlap on tip of SOI waveguide and partly etched BOX under the interface. With large tolerance up to 5 µm, the interface can be easily fabricated.

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Section: Iib Coupling Possibilities and Lossessupporting

confidence: 74%

“…The common disadvantages of these methods are complicated process and time-consuming alignment. In our previous work [6], a method to fabricate fiber/waveguide interconnections with 3D SU8 prism having ultra small inclined angle was presented. The best transmission efficiency of the structure was 55 %.…”

Section: Introductionmentioning

confidence: 99%

A novel simple 3D SU8 prism-SOI waveguide interface for light coupling improvement

Nguyen

et al. 2014

2014 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3m-Nano)

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“…A secondary core made of There are also some 3D tapers assisted with other materials to match with the fiber core considering both the size and the effective index as Figure 14d depicts. Amorphous silicon [100,101], SU-8 [92,102], SiON [92], and other kinds of index-matching materials are applied in such situations. These materials are compatible with silicon photonic platform and have a moderate refractive index between silicon dioxide and silicon, which can help improve the modal match between the fiber and the waveguide.…”

Section: Edge Couplers Based On Three-dimensional Tapermentioning

confidence: 99%

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Cheng

et al. 2020

Applied Sciences

161

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Silicon photonics has drawn increasing attention in the past few decades and is a promising key technology for future daily applications due to its various merits including ultra-low cost, high integration density owing to the high refractive index of silicon, and compatibility with current semiconductor fabrication process. Optical interconnects is an important issue in silicon photonic integrated circuits for transmitting light, and fiber-to-chip optical interconnects is vital in application scenarios such as data centers and optical transmission systems. There are mainly two categories of fiber-to-chip optical coupling: off-plane coupling and in-plane coupling. Grating couplers work under the former category, while edge couplers function as in-plane coupling. In this paper, we mainly focus on edge couplers in silicon photonic integrated circuits. We deliver an introduction to the research background, operation mechanisms, and design principles of silicon photonic edge couplers. The state-of-the-art of edge couplers is reviewed according to the different structural configurations of the device, while identifying the performance, fabrication feasibility, and applications. In addition, a brief comparison between edge couplers and grating couplers is conducted. Packaging issues are also discussed, and several prospective techniques for further improvements of edge couplers are proposed.

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“…3 dB alignment tolerance of the coupler to TE mode and TM mode up to ± 3.7 μm. The fabrication of 3D waveguides has been realized on SOI platform 14 . Our proposed device is promising as a useful component for the efficient coupling between the practical LN photonic integrated circuits and standard single-mode optical fibers.…”

Section: Discussionmentioning

confidence: 99%

High coupling efficiency and ultra-wide bandwidth fiber-to-chip interface for lithium niobate photonic integrated circuits

XIE

2023

AOPC 2022: Optoelectronics and Nanophotonics

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Thin-film lithium-niobate-on-insulator (LNOI) is a promising platform for nonlinear optics and optical interconnect. It is critical to realize high efficiency for coupling optical signal into lithium niobate photonic integrated circuits. Here we demonstrate a low-loss edge coupler for coupling between a standard optical fiber and sub-micrometer LN strip waveguides. The coupler consists of an inverse tapered mode size converter, as well as a tapered SU-8 polymer curved waveguide which functions an interface between the single-mode optical fiber and the mode size converter. The simulation shows that coupling efficiencies for TE mode and TM mode are -0.42 dB and -0.75 dB at 1550nm, respectively. The coupling efficiency is higher than -0.77 dB for both TE and TM mode in wavelength range of 1450 nm to 1650 nm. This means that our edge coupler has polarization insensitivity and ultra-wide bandwidth.

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SU8 3D prisms with ultra small inclined angle for low-insertion-loss fiber/waveguide interconnection

Cited by 11 publications

References 16 publications

A novel simple 3D SU8 prism-SOI waveguide interface for light coupling improvement

A novel simple 3D SU8 prism-SOI waveguide interface for light coupling improvement

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

High coupling efficiency and ultra-wide bandwidth fiber-to-chip interface for lithium niobate photonic integrated circuits

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