High-Speed All-Optical First- and Second-Order Differentiators Based on Cross-Phase Modulation in Fibers

Velanas, Pantelis; Bogris, Adonis; Argyris, Apostolos; Syvridis, D.

doi:10.1109/jlt.2008.923930

Cited by 52 publications

(24 citation statements)

References 14 publications

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“…As expected, the filtered waveforms emphasize the pulse edges, and both are narrower than the original input pulse. Unlike previous schemes for all-optical intensity differentiation, which were based on XPM in fiber [19] or cross-gain modulation in semiconductor optical amplifiers [22], the proposed edge detection technique does not require an additional probe input. The shape of the two narrowed replicas can be subtracted from that of the original pulse to generate an UWB waveform, as described next.…”

Section: Self-phase Modulation Based Edge Detectionmentioning

confidence: 99%

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Reconfigurable Generation of High-Order Ultra-Wideband Waveforms Using Edge Detection

Zadok

Sendowski

et al. 2010

J. Lightwave Technol.

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Abstract-The generation of ultra-wideband (UWB), high-frequency waveforms based on nonlinear propagation of pulses in optical fibers is reported. Self-phase modulation and subsequent optical filtering are used to implement all-optical edge detectors, which generate two temporally-narrowed replicas of each input pulse. The shapes of the narrowed pulses are subtracted from that of the original one in a balanced differential detector, providing a UWB waveform. The use of multiple replicas and nonlinear propagation allows for the generation of higher-order pulse shapes, beyond those of a Gaussian monocycle or doublet. The output pulse shape is reconfigurable through adjusting the input power and detuning the optical filters. The central radio-frequency of the generated waveforms is as high as 34 GHz, with a fractional bandwidth of 70%.

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Section: Self-phase Modulation Based Edge Detectionmentioning

confidence: 99%

“…In [18], Li and coauthors used cross-gain modulation in an optical parametric amplifier to generate monocycle and doublet pulse shapes. Velanas et al [19] used a cross-phase-modulation (XPM) based technique to obtain monocycle shapes. Both schemes required two input laser sources.…”

mentioning

confidence: 99%

Reconfigurable Generation of High-Order Ultra-Wideband Waveforms Using Edge Detection

Zadok

Sendowski

et al. 2010

J. Lightwave Technol.

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“…11, but the processing speed was intrinsically limited by the operation bandwidth of the RF delay line. Photonic intensity differentiators based on semiconductor optical amplifiers (SOAs) and optical filters (OFs) have also been reported, 24,25 featuring high processing speeds of up to 40-Gb/s. This approach, however, works only for a fixed differentiation order and lacks reconfigurability, whereas in practical applications, processing systems with variable differentiation orders are desired to meet diverse computing requirements.…”

Section: Introductionmentioning

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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“…Currently, photonic DIFF can be mainly divided into two categories, the field DIFF and the intensity DIFF [6]. The intensity DIFF means both input signals and output differentiated signals are carried by the optical intensity or optical power regardless of signal phase, which is useful for ultra-wideband (UWB) microwave communications [7][8][9] and signal encoding [10]. Previously, we achieved such DIFFs by nonlinear effects of semiconductor optical amplifiers (SOAs) [8,11].…”

Section: Introductionmentioning

confidence: 99%

“…Previously, we achieved such DIFFs by nonlinear effects of semiconductor optical amplifiers (SOAs) [8,11]. The intensity DIFF could be also implemented by incoherent photonic processors [12] and highly nonlinear fibers [7], and so forth. On the other hand, the field DIFF means the output optical field (complex signal, including both amplitude and phase) is the differentiation of input field signals, which has potential applications in ultrashort pulse generation [3,13], odd-symmetry Hermite-Gaussian waveform generation [2], and pulse edge recognition [14].…”

Section: Introductionmentioning

confidence: 99%

Compact, flexible and versatile photonic differentiator using silicon Mach-Zehnder interferometers

Dong¹,

Zheng²,

Gao³

et al. 2013

Opt. Express

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We propose and experimentally demonstrate the flexibility and versatility of photonic differentiators using a silicon-based Mach-Zehnder Interferometer (MZI) structure. Two differentiation schemes are investigated. In the first scheme, we demonstrate high-order photonic field differentiators using on-chip cascaded MZIs, including first-, second-, and third-order differentiators. For single Gaussian optical pulse injection, the average deviations of all differentiators are less than 6.5%. In the second scheme, we demonstrate multifunctional differentiators, including intensity differentiator and field differentiator, using an on-chip single MZI structure. These different differentiator forms rely on the relative shift between the probe wavelength and the MZI resonant notch. Our schemes show the advantages of compact footprint, flexible functions and versatile differentiation forms. For example, high order field differentiators can be used to generate complex temporal waveforms, such as high order Hermite-Gaussian waveforms. And intensity differentiators are useful for ultra-wideband pulse generation.

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High-Speed All-Optical First- and Second-Order Differentiators Based on Cross-Phase Modulation in Fibers

Cited by 52 publications

References 14 publications

Reconfigurable Generation of High-Order Ultra-Wideband Waveforms Using Edge Detection

Reconfigurable Generation of High-Order Ultra-Wideband Waveforms Using Edge Detection

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

Compact, flexible and versatile photonic differentiator using silicon Mach-Zehnder interferometers

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