Iterative method for optimal design of flat-spectral-response arrayed waveguide gratings

Park, Shin-Woong; Park, Yohan; Ye, Yun; Kim, Hwi

doi:10.1364/ao.52.007295

Cited by 3 publications

(1 citation statement)

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“…A significant amount of effort has been put into the design of photonic bandpass filters that exhibit desirable passband and stopband behaviors [9]- [11]. While it is possible to extend these designs to filter banks by frequency tuning, it is well known from a signal processing perspective that such approach is sub-optimal due to concerns regarding performance optimality, implementation complexity, and uniformity [12].…”

Section: Introductionmentioning

confidence: 99%

Loss-Tolerant Allpass-Based Filter Bank Design Suitable for Integrated Optics

2014

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This paper presents a novel design algorithm for a filter bank structure that is suitable for photonic integrated circuits. The proposed design is entirely based on the principle of loss-exhibiting allpass filtering, which is a behavior naturally observed in a variety of microscale optical components. The setup and mathematical optimization of the system is explored in detail from a signal processing perspective, and an algorithm based on convex and nonlinear optimization techniques is subsequently presented. The algorithm methodologically utilizes the otherwise-undesirable effect of waveguide loss to derive an allpass-based filter bank structure that is amenable to photonic implementation. The proposed structure is ideal for applications in time-stretched analog-to-digital converters, WDM network channelizers, and general optical signal multiplexers.

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Section: Introductionmentioning

confidence: 99%