- 标题
- 摘要
- 关键词
- 实验方案
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Demonstration of a Sub-GHz flat-top RF-Photonic Filter Enabled by Fourth-order Dispersion Compensation
摘要： We demonstrate a sub-GHz RF-photonic filter based on phase and amplitude control of a wideband all-fiber frequency parametric comb with 25-GHz tone spacing. The narrow bandwidth filter construction based on 221 comb tones was enabled by fourth-order dispersion compensation of the dispersive element. The filter integrity was further tested by retrieval of a set of digital modulated RF channels.
关键词： Chromatic dispersion,Microwave photonics,Optical signal processing,Finite impulse response filters
更新于2025-09-11 14:15:04
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400-Gb/s Single-Photodiode Polarization-Agnostic Kramers-Kronig Reception of Distributedly Aggregated Superchannel
摘要： In its most simple implementation, the Kramers-Kronig (KK) scheme allows the reception of complex modulation formats with a single photodiode. Thereby, in analogy to a heterodyne receiver, an additional continuous wave signal is used which allows under certain conditions the distortion-free reconstruction of the data signal. We present experimental investigations on a novel Kramers-Kronig scheme based on inherently carrier generation at the receiver. We use a distributed superchannel aggregation scheme to demonstrate ultra-wideband single-photodiode reception of a 3×33-GBd single-polarization 32QAM superchannel with this scheme. The impact of polarization rotations is discussed, and we show that variations in data or Kramers-Kronig carrier polarization will only affect the carrier-to-signal power ratio (CSPR), leading to an increase or decrease from the optimum CSPR by about 6 dB. 400-Gb/s net capacity is demonstrated for optimized conditions. In addition, we demonstrate transmission measurements over a 60-km standard single-mode fiber (SSMF) link with a 344-Gb/s net rate superchannel (3×28 GBd sub-carriers) with the novel Kramers-Kronig scheme.
关键词： optical frequency conversion,optical signal processing,Kramers-Kronig receiver,Direct detection,optical fiber communication,sub-carrier modulation
更新于2025-09-09 09:28:46
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[IEEE 2018 20th International Conference on Transparent Optical Networks (ICTON) - Bucharest (2018.7.1-2018.7.5)] 2018 20th International Conference on Transparent Optical Networks (ICTON) - Intensity Jitter Suppression and Quantum Fluctuation for Resolution Improvement in Photonic Analog-to-Digital Conversion
摘要： We discuss resolution improvement of photonic ADCs in high sampling rate with referring ASC’s SNR, which is a function of sampling clock and aperture jitter, DNL, effective input noise, and the number of bits of resolution.
关键词： intensity noise,nonlinear effect,optical sampling,soliton,optical signal processing
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE 3rd Optoelectronics Global Conference (OGC) - Shenzhen, China (2018.9.4-2018.9.7)] 2018 IEEE 3rd Optoelectronics Global Conference (OGC) - A Broadband Microwave Photonic Mixer with the Capability of Phase Shifting
摘要： A broadband microwave photonic mixer with 360-degree phase tunable range and without optical filter is proposed. In the proposed system, two integrated dual-parallel Mach-Zehnder modulators (DPMZM) and a phase modulator (PM) are used. The two DPMZMs driven by the local oscilla- tor (LO) and the radio frequency (RF) signals respectively are properly biased at the minimum transmission point to serve as a carrier-suppressed single-sideband (CS-SSB) modulators. Beating between the two sidebands at a photodetector gener- ates a/an RF/IF signal with a phase equal to the optical phase difference controlled by the bias voltage of PM. The proposed system is theoretically verified and demonstrated, the results that a RF signal from 15 to 39 GHz and an IF signal from 5 to 29 GHz, and a full 360° continuous phase shift of the output IF/RF signal are achieved.
关键词： microwave photonic mixer,analog optical signal processing,phase shift
更新于2025-09-09 09:28:46