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Optical phased array with elephant couplers
2017 International Topical Meeting on Microwave Photonics (MWP)
Year: 2017 | Conference Paper |
A photonic-assisted compressive sampling system using a directly-modulated laser
Pei Li;Minghua Chen;Qiang Guo;Hongwei Chen;Sigang Yang;Shizhong Xie
2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)
Year: 2017 | Conference Paper |
In this paper, a novel photonic-assisted compressive sampling system based on a directly-modulated laser (DML) is proposed. We demonstrate that the proposed sensing system enables signal acquisition (from 500 MHz to 5 GHz) using a 500-MHz analog-to-digital converter (ADC), indicating its promising applications in electromagnetic countermeasure. The performance of the system under nonlinear interfe...Show More
A silicon integrated microwave-photonic transceiver
Minghua Chen;Hongchen Yu;Bo Yang;Yu Li;Hongwei Chen;Shizhong Xie
2017 Optical Fiber Communications Conference and Exhibition (OFC)
Year: 2017 | Conference Paper |
Cited by: Papers (2)
A fully integrated photonic-assisted tunable RF transceiver based on SOI technology has been proposed and experimentally demonstrated, which contains the signal processing units of the up/down-conversion, phase shifting and filtering as well as the frequency multiplier of the local oscillator.Show More
Adaptive Three-Dimensional Optimization for Optical Direct-Detection OFDM
Zhenming Yu;Yiming Lou;Minghua Chen;Hongwei Chen;Sigang Yang;Shizhong Xie
Journal of Lightwave Technology
Cited by: Papers (4)
We propose an adaptive three-dimensional (3-D) optimization including bit loading, power loading, and trellis-coded modulation for optical direct-detection orthogonal frequency division multiplexing (OFDM) in the fading channel. This approach could improve the bandwidth of the various devices such as electro-optical components, digital to analog convertors (DACs), and analog to digital convertors ...Show More
Ultra High-Repetition-Rate Pulse Sources Based on Cascaded Four Wave Mixing in EYDF
Zhaohui Wu;Sigang Yang;Hongwei Chen;Minghua Chen;Shizhong Xie
IEEE Photonics Technology Letters
Cited by: Papers (4)
We report all-fiber tunable ultrahigh-repetition-rate sub-picosecond pulse sources around 1550 nm. The sources are based on cascaded four wave mixing in an erbium-ytterbium co-doped fiber without extra nonlinear fiber. They are seeded by a spacing-tunable phase conjugated dual-wavelength parametric light source centered at 1550 nm. The repetition rate of the pulse sources can be tuned continuously...Show More
High-Speed Compressive Microscopy of Flowing Cells Using Sinusoidal Illumination Patterns
Qiang Guo;Hongwei Chen;Yuxi Wang;Yong Guo;Peng Liu;Xiurui Zhu;Zhen Cheng;Zhenming Yu;Sigang Yang;Minghua Chen;Shizhong Xie
Single-pixel imaging (SPI) exploits the sparsity structure of natural images and enables image acquisition with far fewer measurements than the number of pixels. However, current SPI devices suffer from low imaging speed and an extremely time-consuming image reconstruction operation. Photonic time-stretch (PTS) technique is demonstrated to enable high-speed structured-illumination pattern generati...Show More
Versatile Wideband Polarization-Insensitive Mode Converter Based on Wedge-Shaped Waveguide
Yu Li;Minghua Chen;Hongchen Yu;Hongwei Chen;Sigang Yang;Shizhong Xie
We propose and demonstrate a versatile, low-loss, polarization-insensitive, and wideband mode converter that can be utilized for mode conversion as a basic component in various photonic integrated circuits. The proposed converter is comprised of two reverse wedge-shaped waveguides and can be easily fabricated by a standard fabrication process. To verify its good performance and universality, we pr...Show More
CMOS-Compatible High Resolution Spatial Heterodyne Spectrometer Based on Si3N4/SiO2 Waveguide
Yu Li;Hongchen Yu;Le An;Qiang Guo;Minghua Chen;Hongwei Chen;Sigang Yang;Shizhong Xie
IEEE Photonics Technology Letters
Cited by: Papers (2)
We experimentally demonstrated an integrated spatial heterodyne spectrometer fabricated on double-strip TriPleX waveguide technology. The TriPleX waveguide has a very low loss and tight bend so that the spectrometer realizes a high resolution of 0.023 nm across a wavelength range of 0.184 nm at 1550 nm in a small footprint of 4 mm × 8 mm. Moreover, the proposed integrated spectrometer combines the...Show More
Bandwidth Improvement Using Adaptive Loading Scheme in Optical Direct-Detection OFDM
Zhenming Yu;Hongwei Chen;Minghua Chen;Sigang Yang;Shizhong Xie
In current metro and access optical networks, the frequency band beyond the bandwidth of the electro-optical components is always deprecated due to the fading frequency response. On the other hand, an orthogonal frequency division multiplexing (OFDM) system is managed on individual subcarrier and can adapt to the varied channel frequency response by optimally allocating different modulation format...Show More
Record high-Q optical bandpass filter based on the EIT-like effect between two microrings
Hongchen Yu;Yu Li;Hai Yu;Minghua Chen;Marcel Hoekman;Hongwei Chen;Arne Leinse;Rene G. Heideman;Richard Mateman;Sigang Yang;Shizhong Xie
2016 Optical Fiber Communications Conference and Exhibition (OFC)
Year: 2016 | Conference Paper |
Photonic-assisted RF frontend operating at U-band and V-band based on Si3N4 ultra-high-Q bandpass filter
Hongchen Yu;Hai Yu;Jingjing Wang;Minghua Chen;Marcel Hoekman;Hongwei Chen;Arne Leinse;Rene G. Heideman;Richard Mateman;Sigang Yang;Shizhong Xie
2016 Optical Fiber Communications Conference and Exhibition (OFC)
Year: 2016 | Conference Paper |
Experimental demonstration of channel estimation using image processing in optical direct-detection OFDM
Zhenming Yu;Yiming Lou;Minghua Chen;Hongwei Chen;Sigang Yang;Shizhong Xie
2016 25th Wireless and Optical Communication Conference (WOCC)
Year: 2016 | Conference Paper |
In direct-detection optical orthogonal frequency division multiplexing (OFDM) system, channel impairments such as residual chromatic dispersion (CD), residual synchronization error, and clock frequency offset induce phase shifts over subcarriers. We propose a method of using image processing for phase channel estimation with negligible overhead which is applicable to various subcarrier modulation ...Show More
Channel Estimation on Individual Subcarrier Using Image Processing in Optical OFDM System
Zhenming Yu;Yiming Lou;Minghua Chen;Hongwei Chen;Sigang Yang;Shizhong Xie
IEEE Photonics Technology Letters
Cited by: Papers (4)
In an optical orthogonal frequency division multiplexing (OFDM) system, channel impairments, such as residual chromatic dispersion, residual synchronization error, and clock frequency offset, induce phase shifts over subcarriers. We propose a method of using image processing for phase channel estimation with negligible overhead, which is applicable to various subcarrier modulation formats. We cond...Show More
Stable Mode-Locked Nanosecond Chirp-Free Pulse Generation With Ultra-Narrow Bandwidth
Chen Jin;Sigang Yang;Xiaojian Wang;Hongwei Chen;Minghua Chen;Shizhong Xie
IEEE Photonics Technology Letters
Cited by: Papers (10)
A stable nanosecond chirp-free pulse generation with ultra-narrow bandwidth is established from a passively mode-locked erbium-doped fiber laser with a homemade fiber Bragg grating as the intra-cavity filter and careful intra-cavity dispersion management introduced. The laser generates nearly chirp-free pulse that is close to the Fourier transform-limited condition. The measured pulsewidth is 2 ns...Show More
All-Optical OFDM Demultiplexer Based on an Integrated Silicon-on-Insulator Technique
Hai Yu;Hongchen Yu;Hongwei Chen;Minghua Chen;Sigang Yang;Shizhong Xie
An all-optical orthogonal frequency-division multiplexing (OFDM) demultiplexer based on silicon-on-insulator (SOI) waveguide technology is proposed and experimentally demonstrated. Such an integrated structure performing a discrete Fourier transform (DFT) not only has the advantages of a smaller volume and better stability but can also handle more optical subcarriers by increasing the number of th...Show More
All-Optical Full-Band RF Receiver Based on an Integrated Ultra-High-Q Bandpass Filter
Hongchen Yu;Minghua Chen;Qiang Guo;Marcel Hoekman;Hongwei Chen;Arne Leinse;Rene G. Heideman;Richard Mateman;Sigang Yang;Shizhong Xie
Journal of Lightwave Technology
Cited by: Papers (23)
Ultra-broadband radiofrequency (RF) receivers are required in higher frequency-band wireless communications, radar communications or multi-band applications in radio telescopes. Such ultra-broadband receivers are inherently difficult to establish with electronics because of limits in the bandwidth of the devices. Photonic means of RF photonic receivers/frontends can overcome the bandwidth limitati...Show More
Optical generation of Terahertz based on all fiber highly coherent optical parametric light source
Sigang Yang;Xiaojian Wang;Chen Jin;Donghui Jin;Hongwei Chen;Minghua Chen;Shizhong Xie
2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)
Year: 2015 | Conference Paper |
Narrow band Terahertz generation based on an all fiber, highly coherent pump light source derived from fiber optical parametric process is reported. A pair of phase conjugated beams with high coherence and narrow bandwidth are generated via all fiber parametric process as the seed light. The amplified highly coherent light beam is injected into DSTMS to stimulate the emission of Terahertz radiatio...Show More
Narrow Linewidth Terahertz Generation Engined by All-Fiber Parametric Optical Source
Sigang Yang;Xiaojian Wang;Zhaohui Wu;Chen Jin;Minghua Chen;Shizhong Xie
Narrow linewidth terahertz (THz) generation based on difference frequency generation pumped by an all-fiber parametric light source is reported. A pulse source with an ultra-narrow bandwidth is built up as the pump seed source for the succeeding optical parametric amplification (OPA). A pair of phase-conjugated beams is generated as the seed light through all-fiber OPA. The amplified phase-conjuga...Show More
Si 3N 4-Based Integrated Optical Analog Signal Processor and Its Application in RF Photonic Frontend
Hongchen Yu;Minghua Chen;Qiang Guo;Marcel Hoekman;Hongwei Chen;Arne Leinse;Rene G. Heideman;Richard Mateman;Sigang Yang;Shizhong Xie
Digital signal processing has achieved great success in the field of signal processing over the past several decades. However, as the bandwidth requirement increases, the power consumption and effective number of bits (ENOB) of the analog-to-digital convertor (ADC) have become bottlenecks. One solution is returning to analog and applying microwave photonic technologies, which shows potential for m...Show More
Broadband radio signal serial channelization by optical scanning method
2015 14th International Conference on Optical Communications and Networks (ICOCN)
Year: 2015 | Conference Paper |
Broadband instantaneous radio frequency (RF) measurement has always been a hot research topic for its critical application in radar and electronic warfare. With the frequency of the radar goes higher and higher, photonics assisted implementations have been considered as a promising solution for its inherent large bandwidth. A novel RF signal serial channelization scheme called OSCAR is proposed an...Show More
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