Automatic Monitor-Based Tuning of Reconfigurable Silicon Photonic APF-Based Pole/Zero Filters

Choo, Gihoon; Cai, Shengchang; Wang, Binhao; Madsen, C.K.; Entesari, Kamran; Palermo, Samuel

doi:10.1109/jlt.2018.2795582

Cited by 31 publications

(22 citation statements)

References 34 publications

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“…Proposals have been reported to program PICs targeting specific applications. Examples of this include the configuration of multiport interferometers based on the individual control of tunable couplers and switches 12,39,40 , automated path scheduling and assessment of a complex wavelength-and-space-switch circuit 41 , automated bank filters [42][43][44][45][46] , reconfigurable all-pass filters 47 and beamforming networks 48 . Large-scale and very large-scale PICs will find it difficult to rely on local feedback loops for controlling each tunable unit due to the excessive overhead caused by monitors and electronic access tracks.…”

Section: Discussionmentioning

confidence: 99%

Multipurpose self-configuration of programmable photonic circuits

et al. 2020

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Programmable integrated photonic circuits have been called upon to lead a new revolution in information systems by teaming up with high speed digital electronics and in this way, adding unique complementary features supported by their ability to provide bandwidth-unconstrained analog signal processing. Relying on a common hardware implemented by two-dimensional integrated photonic waveguide meshes, they can provide multiple functionalities by suitable programming of their control signals. Scalability, which is essential for increasing functional complexity and integration density, is currently limited by the need to precisely control and configure several hundreds of variables and simultaneously manage multiple configuration actions. Here we propose and experimentally demonstrate two different approaches towards management automation in programmable integrated photonic circuits. These enable the simultaneous handling of circuit self-characterization, auto-routing, self-configuration and optimization. By combining computational optimization and photonics, this work takes an important step towards the realization of high-density and complex integrated programmable photonics.

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Section: Discussionmentioning

confidence: 99%

Multipurpose self-configuration of programmable photonic circuits

et al. 2020

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“…With the accompanying optimization strategy we have shown that we can configure different ARMA filter transmission spectra. We did this by only tuning the coupling coefficients of the tunable couplers in the filter, without tuning the phase shifters.The tuning strategy proposed by Gihoon 12 for the conventional ring-loaded MZI is enabled by one additional ring with photodiode and by characterizing each individual tunable coupler. Such an algorithm would work if the thermal and electric crosstalk between heaters is sufficiently small.…”

Section: Discussionmentioning

confidence: 99%

“…The first emphasises deviations in the pass band, while the second emphasises the rejection band. The target function is a weighted combination of both: (12) As wavelength filters are phase-sensitive interference-based circuits, we expect that the optimization space has many local optima. It is therefore useful to look into various classes of optimization algorithms that could be helpful for our problem.…”

Section: Optimization Algorithmmentioning

confidence: 99%

“…We have demonstrated that our the double ring loaded MZI can implement an elliptical filter with the given filter synthesis and optimization method. The circuit is also capable to implement filter architectures as shown in 9,12,16 . In the supplementary material, we shown another example to realize a Chebyshev type II filter.…”

Section: Cascade For Higher Order Filtermentioning

confidence: 99%

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Programmable Wavelength Filter with Double Ring Loaded MZI

Wang

Chen

Khan

et al. 2021

Preprint

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We propose a novel filter circuit that incorporates a double ring resonator with a balanced Mach-Zehnder interferometer (MZI).The circuit has a response equivalent to a conventional ring loaded MZI filter, but with added flexibility in terms of configurability. The second-order filter can also be cascaded to realize higher-order filters. The circuit incorporates a two-stage input and output coupler to further reduce the effect of dispersion. A combination of local and global optimization strategies to program the filter, using tailored objective functions, have been tested in simulation and experiments. To our best knowledge, this is the first time a global optimization strategy is directly used in ARMA filter synthesis and simulation without any additional requirement. We further extend the optimization strategy into experiments and demonstrated its use in practical case for programmable filter circuits.

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“…In recent decades, Silicon Photonics has received attention as an emerging technology in semiconductors for optical telecommunications and optical interconnections [8][9][10]. In recent years, [11][12][13], Silicon Photonics has been one of the most promising platforms for photonic integration. This can be related mainly to the correlation to a very high index difference and the development of CMOS technology, which permits the use of facilities for processing electronics to build photonic circuits [14].…”

Section: Introductionmentioning

confidence: 99%

Design of a Low Index Silicon Micro Ring Resonators

Barua

2020

IJOP

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Optical resonators where light will circulate in two opposite directions independently. Usually, the two distinct topologies of optical resonators are Linear and Ring. Two end mirrors with perpendicular light incidence have linear resonators (standing-wave resonators). In the other hand, there are no end mirrors in ring resonators; none of the resonator mirrors reflects light back into itself. Given its versatility and cost-effectiveness, it is beneficial to provide a low index ring resonator. Compared with existing high index technologies it can provide an attractive solution. The refractive index difference plays a key role in evaluating the properties of an optical dielectric waveguide, and a higher index contrast allows for shifting to greater integration scales and accessibility to new technologies and interfaces. However high contrast waveguides are harder to realize and more important, that their use does not raise any severe impediments. The intent of this article is to evaluate the impact of the waveguide features with regard to the correlation of the index and to investigate the complexities. This paper evaluates the influence of the index contrast on dielectric waveguide characteristics such as single mode system, losses, technical constraints, and available materials. Evaluation is developed by utilizing Rsoft CAD, known as BeamProp software, for ring resonators (single, double or triple optical loop). The main objective of this contribution is to achieve maximum flexibility and more productivity from the proposed design. This paper is an analogy for the design of optical waveguides, so that we can achieve flexibility by lowering the silicon index.

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Automatic Monitor-Based Tuning of Reconfigurable Silicon Photonic APF-Based Pole/Zero Filters

Cited by 31 publications

References 34 publications

Multipurpose self-configuration of programmable photonic circuits

Multipurpose self-configuration of programmable photonic circuits

Programmable Wavelength Filter with Double Ring Loaded MZI

Design of a Low Index Silicon Micro Ring Resonators

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