Ultra-Broadband and Ultra-Compact Optical 90° Hybrid Based on 2×4 MMI Coupler with Subwavelength Gratings on Silicon-on-Insulator

Xu, Luhua; Wang, Yun; Patel, David; Morsy-Osman, Mohamed; Li, Rui; Hui, Michael; Parvizi, Mahdi; Ben-Hamida, Naim; Plant, David V.

doi:10.1364/ofc.2018.m3i.7

Cited by 13 publications

(10 citation statements)

References 4 publications

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“…Also, grating couplers can be replaced by edge couplers to reduce the coupling loss. To reduce the impact of fabrication errors, a compact MMI with sub-wavelength gratings [26] can be used to mitigate the effects of etching and substrate non-uniformity. Additionally, an optimized 5×5 MMI design, such as using sub-wavelength structures in Ref.…”

Section: Measurement Of Quantization Curves and Tranfer Functionmentioning

confidence: 99%

Photonic sampled and quantized analog-to-digital converters on thin-film lithium niobate platform

Tu¹,

Huang²,

Liu³

et al. 2022

Preprint

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In this paper, an on-chip photonic sampled and quantized analog-to-digital converter (ADC) on thin-film lithium niobate platform is experimentally demonstrated. Using two phase modulators as a sampler and a 5×5 multimode interference (MMI) coupler as a quantizer, an 1 GHz sinusoidal analog input signal was successfully converted to a digitized output with a 20 GSample/s sampling rate. To evaluate the system performance, the quantization curves together with the transfer function of the ADC were measured. The experimental effective number of bits (ENOB) was 3.17 bit. The demonstrated device is capable of operating at a high frequency up to 70 GHz, making it a promising solution for on-chip ultra-high speed analog-to-digital conversion.

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Section: Measurement Of Quantization Curves and Tranfer Functionmentioning

confidence: 99%

Photonic sampled and quantized analog-to-digital converters on thin-film lithium niobate platform

Tu¹,

Huang²,

Liu³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…We would like to introduce two applications for this device. One is the 90 degrees hybrid [7,8,9,10] for the coherent detection. The other is the optical switch used in a multimode interconnection [11,12].…”

Section: Applicationsmentioning

confidence: 99%