Low-loss and misalignment-tolerant fiber-to-chip edge coupler based on double-tip inverse tapers

Wang, Jing; Xuan, Yi; Chung-Hun, Lee; Niu, Ben; Liu, Lei; Liu, Gordon Ning; Qi, Minghao

doi:10.1364/ofc.2016.m2i.6

Cited by 36 publications

(27 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The utilization of multiple tips can introduce a high degree of design freedom to realize the expected coupling efficiency within a notably small footprint. The total length of a multi-tip taper is usually below 100 µm [59,60]. As depicted in [60], an edge coupler on the basis of double-tip inverse tapers is designed, fabricated, and characterized.…”

Section: Edge Couplers Based On Multiple Tapersmentioning

confidence: 99%

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Cheng

et al. 2020

Applied Sciences

151

View full text Add to dashboard Cite

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.

show abstract

Section: Edge Couplers Based On Multiple Tapersmentioning

confidence: 99%

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Cheng

et al. 2020

Applied Sciences

151

View full text Add to dashboard Cite

show abstract

“…The coupling loss at the oxide mode converter-nanotaper interface is dominated by the nanotaper design and is weakly dependent on the oxide cladding thickness. The 1dB penalty misalignment tolerance between the fiber and the oxide mode converter is +/-2.5µm and +/-2.4µm in the horizontal and vertical directions, respectively ( figure 5); which compares favorably with other edge coupling methods [1,12,20,21,25,30,41].…”

Section: Methodsmentioning

confidence: 88%

Fiber-to-chip fusion splicing for low-loss photonic packaging

Nauriyal

Song

et al. 2019

Optica

View full text Add to dashboard Cite

Silicon photonic devices are poised to enter high volume markets such as data-communications, telecommunications, biological sensing, and optical phased arrays; however, permanently attaching a fiber to the photonic chip with high optical efficiency remains a challenge. We present a robust and low-loss packaging technique of permanent optical edge coupling between a fiber and a chip using fusion splicing which is low-cost and scalable to high volume manufacturing. We fuse a SMF-28 cleaved fiber to the chip via CO2 laser and reinforce it with optical adhesive. We demonstrate minimum loss of 1.0dB per-facet with 0.6dB penalty over 160nm bandwidth from 1480nm-1640nm.

show abstract

“…Light is coupled in and out of the waveguide structure through fiber-to-chip grating couplers with approximately 6 dB insertion loss per coupler. The grating couplers are used to facilitate optical probing and can easily be replaced with low-loss edge couplers (typically 1 dB/coupler) [26]. During the experiments, the modulator was reverse-biased at −0.75 V. The EAM modulates a continuous wave 1562 nm laser with 12 dBm output power.…”

Section: E/o Convertermentioning

confidence: 99%

Real-Time 100-GS/s Sigma-Delta Modulator for All-Digital Radio-Over-Fiber Transmission

Bauwelinck

Demeester

et al. 2020

J. Lightwave Technol.

View full text Add to dashboard Cite

All-digital radio-over-fiber (RoF) transmission has attracted a significant amount of interest in digital-centric systems or centralized networks because it greatly simplifies the front-end hardware by using digital processing. The sigma-delta modulator (SDM)-based all-digital RoF approach pushes the digital signal processing as far as possible into the transmit chain. We present a real-time 100-GS/s fourth-order single-bit SDM for all-digital RoF transmission in the high-frequency band without the aid of analog/optical up-conversion. This is the fastest sigma-delta modulator reported and this is also the first real-time demonstration of sigma-delta-modulated RoF in the frequency band above 24 GHz. 4.68 Gb/s (2.34 Gb/s) 64-QAM is transported over 10-km standard single-mode fiber in the C-band with 6.46% (4.73%) error vector magnitude and 3.13 Gb/s 256-QAM can be even received in an optical back-to-back configuration. The carrier frequency can be digitally tuned at run-time, covering a wide frequency range from 22.75 to 27.5 GHz. Besides, this high-speed sigma-delta modulator introduces less than 1 µs latency in the transmit chain. Its all-digital nature enables network virtualization, making the transmitter compatible with different existing standards. The prominent performance corroborates the strong competitiveness of this SDMbased RoF approach in high-frequency RoF 5G communication.

show abstract

Low-loss and misalignment-tolerant fiber-to-chip edge coupler based on double-tip inverse tapers

Cited by 36 publications

References 17 publications

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Edge Couplers in Silicon Photonic Integrated Circuits: A Review

Fiber-to-chip fusion splicing for low-loss photonic packaging

Real-Time 100-GS/s Sigma-Delta Modulator for All-Digital Radio-Over-Fiber Transmission

Contact Info

Product

Resources

About