Micro-ring resonator quality factor enhancement via an integrated Fabry-Perot cavity

Wu, Jiayang; Moein, Tania; Xu, Xingyuan; Ren, Guanghui; Mitchell, Arnan; Moss, David J.

doi:10.1063/1.4981392

Cited by 132 publications

(99 citation statements)

References 30 publications

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“…2(b). The device architecture used a vertical coupling scheme where the gap (approximately 200nm) could be controlled via film growth -a more accurate approach than lithographic techniques [40]. Other advantages of our platform for nonlinear optics include ultra-low linear loss (~0.06 dB•cm −1 ), a sufficient nonlinearity parameter (~233 W −1 •km −1 ), and most important, negligible nonlinear loss (up to ~25 GW•cm −2 [34][35]).…”

Section: Rf True Time Delays Based On Integrated Optical Frequency Combsmentioning

confidence: 99%

Advanced RF and microwave functions based on an integrated optical frequency comb source

et al. 2018

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Abstract:We demonstrate advanced transversal radio frequency (RF) and microwave functions based on a Kerr optical comb source generated by an integrated micro-ring resonator. We achieve extremely high performance for an optical true time delay aimed at tunable phased array antenna applications, as well as reconfigurable microwave photonic filters. Our results agree well with theory. We show that our true time delay would yield a phased array antenna with features that include high angular resolution and a wide range of beam steering angles, while the microwave photonic filters feature high Q factors, wideband tunability, and highly reconfigurable filtering shapes. These results show that our approach is a competitive solution to implementing reconfigurable, high performance and potentially low cost RF and microwave signal processing functions for applications including radar and communication systems.

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Section: Rf True Time Delays Based On Integrated Optical Frequency Combsmentioning

confidence: 99%

Advanced RF and microwave functions based on an integrated optical frequency comb source

et al. 2018

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“…The sharpening of the filter shape can be attributed to coherent interference within the coupled resonant cavities, which could be useful for implementation of high-Q filters. 7,32 Figure 3 shows the calculated power transmission spectra of asymmetric CSLR resonators (N = 3) when L 1 L 2 . For comparison, we use the same field transmission coefficients [t 1 , t 2 , t 3 ] = [0.87, 0.77, 0.87] in the calculation.…”

Section: Device Configuration and Operation Principlementioning

confidence: 99%

“…., FPC N 1 ), similar to Bragg gratings. 30,31 To study the CSLR resonator based on the scattering matrix method, 32,33 we define the waveguide and coupler parameters of the CSLR resonator in Table I, and so the field transmission …”

Section: Introductionmentioning

confidence: 99%

Advanced photonic filters based on cascaded Sagnac loop reflector resonators in silicon-on-insulator nanowires

et al. 2018

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We demonstrate advanced integrated photonic filters in silicon-on-insulator (SOI) nanowires implemented by cascaded Sagnac loop reflector (CSLR) resonators. We investigate mode splitting in these standing-wave (SW) resonators and demonstrate its use for engineering the spectral profile of on-chip photonic filters. By changing the reflectivity of the Sagnac loop reflectors (SLRs) and the phase shifts along the connecting waveguides, we tailor mode splitting in the CSLR resonators to achieve a wide range of filter shapes for diverse applications including enhanced light trapping, flat-top filtering, Q factor enhancement, and signal reshaping. We present the theoretical designs and compare the CSLR resonators with three, four, and eight SLRs fabricated in SOI. We achieve versatile filter shapes in the measured transmission spectra via diverse mode splitting that agree well with theory. This work confirms the effectiveness of using CSLR resonators as integrated multi-functional SW filters for flexible spectral engineering.

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“…Our device architecture uses a vertical coupling scheme where the gap can be controlled via film growth-a more accurate approach than lithographic techniques. 38,39 The gap between the bus waveguide and the MRR is approximately 200 nm. The compact integrated MRR has a radius of ∼135 µm with a relatively large free spectral range (FSR) of ∼1.6 nm, i.e., ∼200 GHz.…”

Section: Resultsmentioning

confidence: 99%

Reconfigurable broadband microwave photonic intensity differentiator based on an integrated optical frequency comb source

et al. 2017

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We propose and experimentally demonstrate a microwave photonic intensity differentiator based on a Kerr optical comb generated by a compact integrated micro-ring resonator (MRR). The on-chip Kerr optical comb, containing a large number of comb lines, serves as a high-performance multi-wavelength source for implementing a transversal filter, which will greatly reduce the cost, size, and complexity of the system. Moreover, owing to the compactness of the integrated MRR, frequency spacings of up to 200-GHz can be achieved, enabling a potential operation bandwidth of over 100 GHz. By programming and shaping individual comb lines according to calculated tap weights, a reconfigurable intensity differentiator with variable differentiation orders can be realized. The operation principle is theoretically analyzed, and experimental demonstrations of the first-, second-, and third-order differentiation functions based on this principle are presented. The radio frequency amplitude and phase responses of multi-order intensity differentiations are characterized, and system demonstrations of real-time differentiations for a Gaussian input signal are also performed. The experimental results show good agreement with theory, confirming the effectiveness of our approach.

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Micro-ring resonator quality factor enhancement via an integrated Fabry-Perot cavity

Cited by 132 publications

References 30 publications

Advanced RF and microwave functions based on an integrated optical frequency comb source

Advanced RF and microwave functions based on an integrated optical frequency comb source

Advanced photonic filters based on cascaded Sagnac loop reflector resonators in silicon-on-insulator nanowires

Reconfigurable broadband microwave photonic intensity differentiator based on an integrated optical frequency comb source

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