Photonic-chip-based radio-frequency spectrum analyser with terahertz bandwidth

Pelusi, Mark; Luan, Feng; Vo, Trung D.; Lamont, Michael R. E.; Madden, Steven J.; Bulla, Douglas; Choi, Duk‐Yong; Luther‐Davies, Barry; Eggleton, Benjamin J.

doi:10.1038/nphoton.2009.001

Cited by 42 publications

(68 citation statements)

References 16 publications

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“…This raised the device insertion loss by a further ≈3 to 5 dB per facet for 4 and 2 μm wide ribs respectively, however, significant improvement is possible by incorporating on-chip tapers as reported for silicon [5]. Numerically calculated TM mode intensity profile for a 3 μm rib width as reported in [2] (d) Micrograph image of typical As 2 S 3 planar rib waveguide cross-section.…”

Section: Waveguide Characteristicsmentioning

confidence: 96%

“…While original experiments using HNF reported a bandwidth of ≈ 800 GHz [11], the use of the dispersionshifted ChG waveguide has demonstrated both a broader multi-terahertz measurement bandwidth and distortion free trace even for very short optical pulses [2]. Furthermore, "colorless" operation is achieved over a broader ranging signal wavelength.…”

Section: Broadband Rf Spectrum Analysismentioning

confidence: 99%

“…All-optical signal processing is a key technology for enabling various functions applicable to future high-speed optical communications such as optical switching/gating, wavelength conversion [1], and performance monitoring [2]. These can be realized on an ultra-fast timescale by harnessing the optical Kerr effect of an optical waveguide exhibiting a χ (3) nonlinearity, whereby its refractive index changes in proportional to the instantaneous optical intensity, and the nonlinear refractive index, n 2 [3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultrafast nonlinear optics on a chip: Application to signal processing

Pelusi

Luan

et al. 2009

2009 11th International Conference on Transparent Optical Networks

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We review results on the recently developed dispersion-shifted, Chalcogenide waveguides demonstrating nonlinear signal processing on a compact monolithic platform with ultra-broadband capability and moderate launch powers of around 100 mW. Highlight results include broadband wavelength conversion of high-bit rate optical signals, time division multiplexing of 320 Gb/s signals and characterization of 320 Gb/s signals using a photonic chip based RF spectrum analyzer with terahertz bandwidth. The performance advantages stem from the waveguide's design for high nonlinearity and a near zero dispersion at the 1550 nm wavelength. These features are shown to enhance the efficiency of the nonlinear processes underpinning many all-optical signal processing functions.

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Section: Waveguide Characteristicsmentioning

confidence: 96%

Section: Broadband Rf Spectrum Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrafast nonlinear optics on a chip: Application to signal processing

Pelusi

Luan

et al. 2009

2009 11th International Conference on Transparent Optical Networks

View full text Add to dashboard Cite

show abstract

“…Especially, a number of photonic approaches to microwave measurements, for instance, spectrum analysis [14][15][16][17], frequency estimation [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33], angle-of-arrival measurement [34][35], and DFS measurement [36][37][38][39], have been proposed recently. For DFS measurement, based on transversal filtering concept, a reconfigurable microwave photonic in-phase and quadrature detector is designed for DFS estimation in [36], wherein precise wavelength control is required.…”

Section: Introductionmentioning

confidence: 99%

Wideband Microwave Doppler Frequency Shift Measurement and Direction Discrimination Using Photonic I/Q Detection

Lü

Pan

Zou

et al. 2016

J. Lightwave Technol.

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An enhanced approach to realizing wideband microwave Doppler frequency shift (DFS) measurement and direction discrimination based on photonic in-phase and quadrature (I/Q) coherent detection is proposed and demonstrated experimentally. In the proposed approach, the DFS between the transmitted microwave signal and the received echo signal is converted into two quadrature low-frequency electrical signals through the coherent detection by using an optical hybrid and two balanced photodetectors (BPDs). The microwave DFS of interest can be estimated with an unambiguous direction, and in particular with a greatly improved resolution. Meanwhile, photonic coherent and balanced detection effectively eliminates the optical signal to signal beating interferences. In the proof-of-concept experiment, the DFSs from -90 to +90 kHz are successfully estimated for microwave signals at 10, 14, 18, and 38 GHz. The measurement errors are estimated to be less than 5.8 Hz which are an order of magnitude lower than those (i.e., 60 Hz) released before. Such results provide a high resolution for radial velocity measurement as well. In addition, the performance of the proposed approach in term of the signal-to-noise ratio and stability is discussed.Index Terms-Doppler frequency shift measurement, microwave photonics, I/Q coherent detection, optical microwave processing. 0733-8724 (c)

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“…Undoubtedly, during the last decade, semiconductor waveguides with strong nonlinear effects, such as the silicon and chalcogenide waveguide, have attracted tremendous attention [1,2], and have been considerably investigated and demonstrated to realize compactly optoelectronic devices for wavelength conversion [3,4], optical switching [5,6], modulation [7,8], and light propagation [9,10]. Compared to the significant previous reports, the passive GaAs semiconductor waveguide has stronger third order nonlinearity and 2-photon absorption coefficients [11,12] and so it can be considered another highly nonlinear medium, and has already been investigated in wavelength conversion, optical switching, and other potential applications [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Double pulse generation in a highly nonlinear GaAs optical waveguide

Wu¹

2014

Turk J Phys

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This paper presents a simulation and investigation about the nonlinear interplay between an optical pulse and GaAs waveguide. The results obtained show that the nonlinear processes including self-phase modulation, 2-photon absorption, and free carrier related effects will have significant influences on the temporal shape and frequency spectrum of a propagating pulse in the GaAs waveguide with the result that 2-photon absorption can extend the pulse duration that can be again compressed by the free carrier absorption. The outcome spectrum is also asymmetrical due to the free carrier related effects, which takes on a complicated oscillation structure resulting from the interference. In addition, an interesting phenomenon is that the input pulse will eventually evolve into a double pulse along the GaAs waveguide by means of judiciously adjusting the intensity, waveform, and time duration of the input pulse, i.e. when the time duration of the input pulse is larger than the carrier lifetime, the input pulse with high enough intensity can develop into a double pulse at the end of the waveguide.

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Photonic-chip-based radio-frequency spectrum analyser with terahertz bandwidth

Cited by 42 publications

References 16 publications

Ultrafast nonlinear optics on a chip: Application to signal processing

Ultrafast nonlinear optics on a chip: Application to signal processing

Wideband Microwave Doppler Frequency Shift Measurement and Direction Discrimination Using Photonic I/Q Detection

Double pulse generation in a highly nonlinear GaAs optical waveguide

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