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

By Xingyuan Xu, Jiayang Wu, M. Shoeiby, Thach G. Nguyen, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss. 2017

235 citations recorded by the source corpus.

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.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/e6acfbc8f4ffbf927d39b2be6b8b92fc6585142f

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In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

Citations in the corpus

RF Photonics: An Optical Microcombs’ Perspective (2018, methodology): “bandwidth limitations, only a small portion of the generated comb spectrum is used in [39], [158].”
Orthogonally Polarized RF Optical Single Sideband Generation and Dual-Channel Equalization Based on an Integrated Microring Resonator (2018, background): “2 million [42]–[46], and a 20 dB bandwidth of ∼1 GHz (Fig.”
Photonic RF Arbitrary Waveform Generator Based on a Soliton Crystal Micro-Comb Source (2020, background): “tions [25]–[33], such as optical true time delays [25], transversal filters [26]–[28], signal processors [29]–[31], channelizers [34], [35], and phase-encoded signal generators [33].”
Microcomb-Based Photonic RF Signal Processing (2019, methodology): “Based on these advantages, a wide range of RF applications have been demonstrated, such as optical true time delays [23]–[25], transversal filters [25]–[27], signal processors [28], [29], channelizers [30], [31] and others [32]–[34].”
Broadband RF Channelizer Based on an Integrated Optical Frequency Kerr Comb Source (2018, background): “This bandwidth is extremely challenging for mode-locked lasers and externally-modulated comb sources to achieve [41]–[44].”
Microwave and RF Photonic Fractional Hilbert Transformer Based on a 50 GHz Kerr Micro-Comb (2019, background): “quency generation, RF measurements, and RF signal reshaping [13]–[16].”
Photonic RF Phase-Encoded Signal Generation With a Microcomb Source (2020, background): “micro-combs, such transversal filters [25]–[27], differentiators [28], optical true time delays [29], [30] and channelizers [31],”
Photonic RF and microwave filters based on 49 GHz and 200 GHz Kerr microcombs (2020, unknown): “f the system. By properly setting the tap coefficients, a reconfigurable transversal filter with transfer functions can be diverse achieved, including Hilbert transformers [115, 124], differentiators [123], and bandpass filters [ 120, 122, 127]. As Fig. 3 shows, the core of the microcombbased transv”