We propose and experimentally demonstrate DAC-free 4096-QAM OFDM transmission based on 2-bit delta-sigma modulator and MSB/LSB separation with DDMZM. 9 × 100MHz signals can be transmitted over 10km SSMF at 8 OSR ...
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We present bandwidth-efficient cascaded hybrid digital-analog radio-over-fiber scheme exhibiting >10dB SNR enhancement per linearly increased bandwidth. Up to 70.8dB SNR is achieved after 20km SSMF using O-band DML...
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We propose a terahertz(THz)vortex emitter that utilizes a high-resistance silicon resonator to generate vortex beams with various topological *** the challenge of double circular polarization superposition resulting f...
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We propose a terahertz(THz)vortex emitter that utilizes a high-resistance silicon resonator to generate vortex beams with various topological *** the challenge of double circular polarization superposition resulting from the high refractive index contrast,we regulate the transverse spin state through a newly designed second-order grating partially etched on the waveguide’s top *** reflected wave can be received directly by a linearly polarized antenna,simplifying the *** from the tuning feature,a joint detection method involving positive and negative topological charges identifies and detects rotational Doppler effects amid robust micro-Doppler interference *** emitter can be used for the rotational velocity measurement of an on-axis spinning object,achieving an impressive maximum speed error rate of∼2%.This approach holds promise for the future development of THz vortex beam applications in radar target detection and countermeasure systems,given its low cost and potential for mass production.
We built a mode-locked laser with a base frequency of 150 MHz, which can achieve 7th harmonic mode-locking up to 1.05 GHz by fine-tuning the polarization device in the cavity with high super mode suppression ratio ove...
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We overview the recent progress of high-capacity mobile fronthaul based on digital-analog radio-over-fiber and self-homodyne coherent detection. The principle, architecture, and perspectives are discussed.
We overview the recent progress of high-capacity mobile fronthaul based on digital-analog radio-over-fiber and self-homodyne coherent detection. The principle, architecture, and perspectives are discussed.
We experimentally demonstrate high-capacity coherent DA-RoF fronthaul leveraging pilot symbol- and BPS-based carrier phase recovery. Up to 4.42- This and 32.6- This CPRI-equivalent rates are achieved with single-carri...
We experimentally demonstrate high-capacity coherent DA-RoF fronthaul leveraging pilot symbol- and BPS-based carrier phase recovery. Up to 4.42- This and 32.6- This CPRI-equivalent rates are achieved with single-carrier (256-QAM) and WDM (1024-QAM) transmission over 10-km SSMF, respectively.
A low Self-noise giant interferometric fiber optic gyroscope system has been built for geophysical rotation sensing. The gyroscope 24-hour stability test shows that sensitivity can reach 1.65 × 10-9 rad/s/√Hz. &...
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We propose a silicon multi-functional photonic processing chip for multiply-accumulate computation (MAC), which is capable for high-speed data encoding and flexible weight control. Experimental results verify a 6-bit ...
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