Tailorable and Broadband On-Chip Optical Power Splitter

Kim, Hyeongpin; Shin, Heedeuk

doi:10.3390/app9204239

Cited by 14 publications

(3 citation statements)

References 22 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, such small features are well beyond the fabrication limitations set by foundries. The majority of the adiabatic power splitters with larger minimum feature sizes have linear taper profiles [40][41][42][43][44][45][46], whereas the linear taper profiles are not ideal for adiabatic transitions, and using non-linear profiles can significantly reduce the device lengths even with large minimum feature sizes.…”

Section: Introductionmentioning

confidence: 99%

Foundry-Processed Compact and Broadband Adiabatic Optical Power Splitters with Strong Fabrication Tolerance

Ozcan,

Aitchison,

Mojahedi

2023

Photonics

View full text Add to dashboard Cite

Optical power splitters play a crucial role as the fundamental building blocks for many integrated optical devices. They should have low losses, a broad bandwidth, and a high tolerance to fabrication errors. Adiabatic optical power splitters inherently possess these qualities while being compatible with foundry processes well suited for mass production. The long device lengths of adiabatic power splitters, however, are a limiting factor to achieve compact device sizes, which must be reduced. Here, we used a polynomial taper profile optimization algorithm to design 1 × 2 and 2 × 2 adiabatic power splitters with significantly shorter lengths than their adiabatic counterparts. The best-performing 1 × 2 and 2 × 2 power splitters had 20 μm and 16 μm coupling lengths, respectively. Our designs had minimum feature sizes ranging from 140 nm to 200 nm, and our measurements averaged across nine different chips showed excellent consistency in performance for devices with 180 nm and 200 nm minimum features. Both the 1 × 2 and 2 × 2 adiabatic optical power splitters had excess losses less than 0.7 dB over a 100 nm bandwidth, with a standard deviation lower than 0.3 dB. Furthermore, our measurements showed splitting ratios within 50 ± 3% over a 130 nm bandwidth. We also demonstrated the design of 1 × 2 power splitters with arbitrary splitting ratios, where splitting ratios ranging from 50:50 to 94:6 were achieved with standard deviations between 2% and 6%.

show abstract

Section: Introductionmentioning

confidence: 99%

Foundry-Processed Compact and Broadband Adiabatic Optical Power Splitters with Strong Fabrication Tolerance

Ozcan,

Aitchison,

Mojahedi

2023

Photonics

View full text Add to dashboard Cite

show abstract

“…DCs have attracted a lot of attention because of their simple structure and compact footprint. The insertion loss is generally low, but these devices exhibit a high wavelength sensitivity, resulting in a poor operating bandwidth [21]. Based on DCs, different schemes have been proposed to reduce the wavelength dependence, including asymmetric DCs, adiabatic DCs and sub-wavelength grating-based DCs (SWG-DCs).…”

Section: Introductionmentioning

confidence: 99%

Ultra-Broadband, Compact Arbitrary Ratio Power Splitters Enabled by Adiabatic Sub-Wavelength Grating

et al. 2023

View full text Add to dashboard Cite

An ultra-broadband, compact and CMOS-compatible arbitrary ratio power splitter that is based on a directional coupler is proposed on the silicon-on-insulator (SOI) platform. The proposed device consists of an adiabatic sub-wavelength grating (ASWG) and a conventional directional coupler. The wavelength dependence is greatly reduced by introducing an ASWG in the coupling region of the directional coupler. Simulation results show that our proposed device has an operating bandwidth of 250 nm for arbitrary power splitting ratios, with a transmission power variation of less than 8.5%, covering the wavelength range from 1400 nm to 1650 nm. Meanwhile, the device footprint has been narrowed to less than 46 μm. In addition, the power splitters also exhibit a low excess loss of below 0.24 dB. Our proposed ASWG-assisted power splitters show excellent potential for application in large-scale photonic integrated circuits.

show abstract

“…Recently, low-loss and broadband power splitters based on adiabatically tapered waveguides have been reported [29,30]. However, these power splitters were designed with silicon strip waveguides, which cause tight mode confinement and weak coupling strength between waveguides.…”

Section: Introductionmentioning

confidence: 99%

Low-Loss and Broadband Silicon Photonic 3-dB Power Splitter with Enhanced Coupling of Shallow-Etched Rib Waveguides

2020

View full text Add to dashboard Cite

A silicon photonic 3-dB power splitter is one of the essential components to demonstrate large-scale silicon photonic integrated circuits (PICs), and can be utilized to implement modulators, 1 × 2 switches, and 1 × N power splitters for various PIC applications. In this paper, we reported the design and experimental demonstration of low-loss and broadband silicon photonic 3-dB power splitters. The power splitter was realized by adiabatically tapered rib waveguides with 60-nm shallow etches. The shallow-etched rib waveguides offered strong coupling and relaxed critical dimensions (a taper tip width of 200 nm and gap spacing of 300 nm). The fabricated device exhibited an excess loss as low as 0.06 dB at a 1550-nm wavelength and a broad operating wavelength range from 1470 nm to 1570 nm. The relaxed critical dimensions (≥200 nm) make the power splitter compatible with standard fabrication processes of existing silicon photonics foundries.

show abstract

Tailorable and Broadband On-Chip Optical Power Splitter

Cited by 14 publications

References 22 publications

Foundry-Processed Compact and Broadband Adiabatic Optical Power Splitters with Strong Fabrication Tolerance

Foundry-Processed Compact and Broadband Adiabatic Optical Power Splitters with Strong Fabrication Tolerance

Ultra-Broadband, Compact Arbitrary Ratio Power Splitters Enabled by Adiabatic Sub-Wavelength Grating

Low-Loss and Broadband Silicon Photonic 3-dB Power Splitter with Enhanced Coupling of Shallow-Etched Rib Waveguides

Contact Info

Product

Resources

About