Designing and analyzing microwave photonic spectral domain filters based on transversal filtering with optical microcombs

Abstract

Microwave transversal filters, which are implemented based on the transversal filter structure in digital signal processing, offer a high reconfigurability for achieving a variety of signal processing functions without changing hardware. When implemented using microwave photonic (MWP) technologies, also known as MWP transversal filters, they provide competitive advantages over their electrical counterparts, such as low loss, large operation bandwidth, and strong immunity to electromagnetic interference. Recent advances in high performance optical microcombs provide compact and powerful multiwavelength sources for MWP transversal filters that require a larger number of wavelength channels to achieve high performance, allowing for the demonstration of a diverse range of filter functions with improved performance and new features. Here, we present a comprehensive performance analysis for microcomb based MWP spectral filters based on the transversal filter approach. First, we investigate the theoretical limitations in the filter spectral response induced by finite tap numbers. Next, we analyze the distortions in the filter spectral response resulting from experimental error sources. Finally, we assess the influence of input signals bandwidth on the filtering errors. These results provide a valuable guide for the design and optimization of microcomb-based MWP transversal filters for a variety of applications.

33 pages, 10 figures, 33 references

References in corpus (20)

• Optical frequency comb generation from a monolithic microresonator
• All-optical signal processing platforms for CMOS compatible integrated nonlinear optics
• 11 TeraFLOPs per second photonic convolutional accelerator for deep learning optical neural networks
• Universal Dynamics of Kerr Frequency Comb Formation in Microresonators
• Graphene oxide: new opportunities for optoelectronic, electronic and photonic chips
• Photonic RF and microwave reconfigurable filters and true time delays based on an integrated optical Kerr frequency comb source
• Photonic radio frequency and microwave intensity differentiator based on an optical frequency comb source in an integrated micro-ring resonator
• High performance photonic microwave filters based on a 50GHz optical soliton crystal Kerr micro-comb
• Generation of very flat optical frequency combs from continuous-wave lasers using cascaded intensity and phase modulators driven by tailored radio frequency waveforms
• Optical data transmission at 44Tb/s and 10 bits/s/Hz over the C-band with standard fibre and a single micro-comb source
• Hilbert Transform based Quadrature Hybrid RF Photonic Coupler via a Micro-Resonator Optical Frequency Comb Source
• Microwave and RF signal processing based on integrated soliton crystal optical microcombs
• Bridging microcombs and silicon photonic engines for optoelectronics systems
• Microwave photonic fractional Hilbert transformer with an integrated optical soliton crystal micro-comb
• Phase-encoded RF signal generation based on an integrated 49GHz micro-comb optical source
• Comb-Based Radio-Frequency Photonic Filters with Rapid Tunability and High Selectivity
• Applications of integrated optical microcombs
• Reconfigurable radiofrequency filters based on versatile soliton microcombs
• Noise conversion in Kerr comb RF photonic oscillators
• Characterization and Compensation of the Residual Chirp in a Mach-Zehnder-Type Electro-Optical Intensity Modulator

Cited by in corpus (2)

• The performance of microwave photonic signal processors based on microcombs with different input signal waveforms
• Ultra-high performance microwave spectral filters using optical microcombs