The Experts below are selected from a list of 49362 Experts worldwide ranked by ideXlab platform
Jianping Yao - One of the best experts on this subject based on the ideXlab platform.
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a multifunctional photonic integrated circuit for diverse Microwave Signal generation transmission and processing
Laser & Photonics Reviews, 2019Co-Authors: Xihua Zou, Jianping Yao, Wei Pan, Bin Luo, Lianshan Yan, Zizheng Cao, Fang Zou, Xianglei Yan, Xiong Deng, A M J KoonenAbstract:Microwave photonics (MWP) studies the interaction between Microwaves and optical waves for the generation, transmission, and processing of Microwave Signals (i.e., three key domains), taking advantage of the broad bandwidth and low loss offered by modern photonics. Integrated MWP using photonic integrated circuits (PICs) can reach a compact, reliable, and green implementation. Most PICs, however, are recently developed to perform one or more functions restricted inside a single domain. Herein, as highly desired, a multifunctional PIC is proposed to cover the three key domains. The PIC is fabricated on an InP platform by monolithically integrating four laser diodes and two modulators. Using the multifunctional PIC, seven fundamental functions across Microwave Signal generation, transmission, and processing are demonstrated experimentally. Outdoor field trials for electromagnetic environment surveillance along in-service high-speed railways are also performed. The success of such a PIC marks a key step forward for practical and massive MWP implementations.
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simultaneous multi frequency phase coded Microwave Signal generation at six different frequencies using a dp bpsk modulator
Journal of Lightwave Technology, 2019Co-Authors: Yang Chen, Jianping YaoAbstract:An approach to the generation of a multi-frequency phase-coded Microwave Signal at six different Microwave carrier frequencies using a laser diode and a dual-polarization binary phase-shift keying (DP-BPSK) modulator is proposed and experimentally demonstrated. The key component in the proposed system is the DP-BPSK modulator, which consists of two dual-drive Mach–Zehnder modulators (DD-MZMs) that are driven by a binary coding Signal and a Microwave reference Signal. By controlling the bias points of the DD-MZMs, and the power of the coding Signal and the Microwave reference Signal, phase-coded Microwave Signals at six different frequencies are generated at the output of a photodetector. An experiment is performed. A multi-frequency phase-coded Microwave Signal at six different carrier frequencies in a frequency range from 1 to 19.5 GHz is generated. The performance in terms of phase recovery accuracy and pulse compression capability is evaluated. The interferences between different channels are also evaluated and no significant interferences are observed.
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Silicon photonic integrated circuits for Microwave Signal generation and processing
Smart Photonic and Optoelectronic Integrated Circuits XXI, 2019Co-Authors: Weifeng Zhang, Jianping YaoAbstract:High-frequency Microwave Signal generation and processing are highly needed in future multi-functional radar and nextgeneration wireless communication systems. It is extremely difficult or impossible for electronics to fulfil the tasks. As an enabling technology, photonics has been considered a promising solution for the generation and processing of highfrequency Microwave Signals. In this paper, photonic integrated solutions for Microwave Signal generation and processing will be discussed. Specifically, a monolithically integrated silicon-photonic frequency-tunable Microwave bandpass filter and a frequency-tunable low phase-noise optoelectronic oscillator are discussed. This successful demonstration of the two integrated Microwave photonic systems marks a significant step forward for large-scale implementation of integrated Microwave photonic systems for future radar and wireless communication applications.
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Photonic Integrated Circuits for Microwave Signal Generation and Processing
Conference on Lasers and Electro-Optics, 2018Co-Authors: Jianping YaoAbstract:Silicon photonic integrated circuits (PICs) for the implementation of Microwave photonic systems to perform functions including Microwave Signal processing based on a reconfigurable grating, and Microwave Signal generation based on an optoelectronic oscillator are disused.
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reconfigurable single shot incoherent optical Signal processing system for chirped Microwave Signal compression
Chinese Science Bulletin, 2017Co-Authors: Shuqian Sun, Jianping Yao, Ninghua Zhu, Antonio Malacarne, Sophie Larochelle, Jose AzanaAbstract:We propose and demonstrate a reconfigurable and single-shot incoherent optical Signal processing system for chirped Microwave Signal compression, using a programmable optical filter and a multi-wavelength laser (MWL). The system is implemented by temporally modulating a specially shaped MWL followed by a suitable linear dispersive medium. A Microwave dispersion value up to 1.33 ns/GHz over several GHz bandwidth is achieved based on this approach. Here we demonstrate a single-shot compression for different linearly chirped Microwave Signals over several GHz bandwidth. In addition, the robustness of the proposed system when input RF Signals are largely distorted is also discussed.
Shilong Pan - One of the best experts on this subject based on the ideXlab platform.
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Photonic-Assisted Multi-Frequency Phase-Coded Microwave Signal Generation
2018 IEEE Photonics Conference (IPC), 2018Co-Authors: Yang Chen, Shilong PanAbstract:A novel photonic approach for multi-frequency phase-coded Microwave Signal generation is proposed using a dual-drive Mach-Zehnder modulator. The approach has good frequency tunability limited only by the bandwidth of the modulator. Simultaneous generation of phase-coded Microwave Signals at 5, 10 and 15 GHz are demonstrated.
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phase coded Microwave Signal generation based on a single electro optical modulator and its application in accurate distance measurement
Optics Express, 2015Co-Authors: Fangzheng Zhang, Bindong Gao, Shilong PanAbstract:A novel scheme for photonic generation of a phase-coded Microwave Signal is proposed and its application in one-dimension distance measurement is demonstrated. The proposed Signal generator has a simple and compact structure based on a single dual-polarization modulator. Besides, the generated phase-coded Signal is stable and free from the DC and low-frequency backgrounds. An experiment is carried out. A 2 Gb/s phase-coded Signal at 20 GHz is successfully generated, and the recovered phase information agrees well with the input 13-bit Barker code. To further investigate the performance of the proposed Signal generator, its application in one-dimension distance measurement is demonstrated. The measurement accuracy is less than 1.7 centimeters within a measurement range of ~2 meters. The experimental results can verify the feasibility of the proposed phase-coded Microwave Signal generator and also provide strong evidence to support its practical applications.
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Background-free pulsed Microwave Signal generation based on spectral shaping and frequency-to-time mapping
Photonics Research, 2014Co-Authors: Fangzheng Zhang, Shilong PanAbstract:A novel scheme for the generation of background-free pulsed Microwave Signals is proposed and experimentally demonstrated based on spectral shaping, frequency-to-time mapping, and balanced photodetection. In the proposed scheme, the optical spectral shaper, which consists of a differential group delay (DGD) element, two polarization controllers, and a polarization beam splitter, has two outputs with complementary power transfer functions. By passing a short optical pulse through the spectral shaper and a dispersive element (DE), a pulsed Microwave Signal is obtained after balanced photodetection. Thanks to the balanced photodetection, the low-frequency components (i.e., the background Signal) in the electrical spectrum is suppressed, leading to the generation of a background-free pulsed Microwave Signal. Meanwhile, the spectral power of the obtained Microwave Signal is enhanced compared to that obtained by single-end detection. Experimental results for the generation of a pulsed Microwave Signal centered at 12.46 GHz show that the background Signal can be suppressed by more than 30 dB, and the spectral power is increased by 5.5 dB. In addition, the central frequency of the obtained background-free pulsed Microwave Signal can be tuned by changing the DGD introduced by the DGD element, and/or by changing the dispersion of the DE.
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photonic generation of a phase coded Microwave Signal based on a single dual drive mach zehnder modulator
Optics Letters, 2013Co-Authors: Zhenzhou Tang, Fangzheng Zhang, Tingting Zhang, Shilong PanAbstract:A compact scheme for photonic generation of a phase-coded Microwave Signal using a dual-drive Mach–Zehnder modulator (DMZM) is proposed and experimentally demonstrated. In the proposed scheme, the radio frequency (RF) carrier and the coding Signal are sent to the two RF ports of the DMZM, respectively. By properly setting the amplitude of the coding Signal and the bias voltage of the DMZM, an exact π-phase-shift phase-coded Microwave Signal is generated. The proposed scheme has a simple structure since only a single DMZM is required. In addition, good frequency tunability is achieved because no frequency-dependent electrical devices or wavelength-dependent optical devices are applied. The feasibility of the proposed scheme is verified by experiment. 2 or 2.5 Gb/s phase-coded 10 and 20 GHz Microwave Signals are successfully generated.
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photonic approach to the simultaneous measurement of the frequency amplitude pulse width and time of arrival of a Microwave Signal
Optics Letters, 2012Co-Authors: Shilong Pan, Jianping YaoAbstract:A photonic approach to the simultaneous measurement of the frequency, pulse amplitude (PA), pulse width (PW), and time of arrival (TOA) of an unknown pulsed Microwave Signal is proposed and demonstrated. The measurement is performed based on optical carrier-suppressed modulation, complementary optical filtering, low-speed photodetection, and electrical Signal processing. A proof-of-concept experiment is carried out. A frequency measurement range of 2–11 GHz with a measurement error for frequency, PA, PW, and TOA within ±0.1 GHz, ±0.05 V, ±1 ns, and ±0.16 ns is achieved.
Zhichao Deng - One of the best experts on this subject based on the ideXlab platform.
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photonic generation of Microwave Signal using a dual wavelength single longitudinal mode fiber ring laser
IEEE Transactions on Microwave Theory and Techniques, 2006Co-Authors: Xiangfei Chen, Zhichao DengAbstract:A novel approach for the generation of high-frequency Microwave Signals using a dual-wavelength single-longitudinal-mode fiber ring laser is proposed and demonstrated. In the proposed configuration, a dual-wavelength fiber Bragg grating (FBG) with two ultranarrow transmission bands in combination with a regular FBG is used to ensure single-longitudinal-mode operation of the fiber ring laser. A semiconductor optical amplifier is employed as the gain medium in the ring cavity. Since the two lasing wavelengths share the same gain cavity, the relative phase fluctuations between the two wavelengths are low and can be used to generate a low-phase-noise Microwave Signal without need of a Microwave reference source. Three dual-wavelength ultranarrow transmission-band FBGs with wavelength spacing of 0.148, 0.33, and 0.053 nm are respectively incorporated into the laser. Microwave Signals at 18.68, 40.95, and 6.95 GHz are obtained by beating the dual wavelengths at a photodetector. The spectral width of the generated Microwave Signals as small as 80 kHz with a frequency stability better than 1 MHz in the free-running mode at room temperature is obtained.
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photonic generation of Microwave Signal using a rational harmonic mode locked fiber ring laser
IEEE Transactions on Microwave Theory and Techniques, 2006Co-Authors: Zhichao DengAbstract:A novel method for Microwave Signal generation using a rational harmonic actively mode-locked fiber ring laser is proposed and demonstrated. The Microwave Signal is generated by beating the actively mode-locked longitudinal modes from the rational mode-locked fiber ring laser at a photodetector. The phases of the longitudinal modes are phased locked, which ensures a generated Microwave Signal with very low phase noise. In the proposed approach, the generated Microwave Signal has a frequency a few times higher than the Microwave drive Signal. Therefore, only a low-frequency reference source and a low-speed modulator are required. A rational harmonic actively mode-locked fiber ring laser is experimentally demonstrated. With a Microwave drive Signal at 5.52 GHz, a Microwave Signal with a frequency that is four times the frequency of the Microwave drive Signal at 22.08 GHz is generated. The generated Microwave Signal is very stable with a spectral width of less than 1 Hz.
Benjamin J Eggleton - One of the best experts on this subject based on the ideXlab platform.
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advanced integrated Microwave Signal processing with giant on chip brillouin gain
Journal of Lightwave Technology, 2017Co-Authors: Amol Choudhary, Blair Morrison, Iman Aryanfar, Shayan Shahnia, Mattia Pagani, Yang Liu, Stephen J Madden, David Marpaung, Benjamin J EggletonAbstract:Processing of Microwave Signals using photonics has several key advantages for applications in wireless communications. However, to bring photonic-based Microwave Signal processing to the mainstream requires a reduction of the form factor. Integration is a route for achieving high-performance, low-cost, and small-footprint Microwave photonic devices. A high on-chip stimulated Brillouin scattering (SBS) gain is essential for synthesizing several key functionalities for advanced integrated Microwave Signal processing. We have optimized our on-chip SBS platform to achieve a record on-chip gain of 52 dB. In this paper, we discuss the implications of this giant gain from the viewpoint of new enabled technologies. The giant gain can be distributed over wide frequencies, which can be exploited for the realization of reconfigurable Microwave bandpass, bandstop, and multiband filters. High gain also enables the demonstration of low-threshold on-chip lasers, which can be of relevance for a low-noise radio-frequency Signal generation. These wide ranges of functionalities are made possible by the breakthrough on-chip gain makes Brillouin-based Microwave photonic Signal processing a promising approach for real-world implementation in the near future.
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on chip stimulated brillouin scattering for Microwave Signal processing and generation
Laser & Photonics Reviews, 2014Co-Authors: Ravi Pant, Blair Morrison, David Marpaung, Irina V Kabakova, Christopher G Poulton, Benjamin J EggletonAbstract:Demonstration of continuously tunable delay, low- noise lasers, dynamically controlled gratings, and optical phase shifting using the stimulated Brillouin scattering (SBS) process has lead to the emergence of SBS as a promising technology for Microwave photonics. On-chip realization of SBS enables photonic integration of Microwave photonic Signal processing and offers significantly enhanced performance and improved efficiency. On-chip stimulated Brillouin scattering is reviewed in the context of slow-light based tunable delay, low-noise narrow linewidth lasers and filtering for integrated Microwave photonics. A discussion on key material and device properties, necessary to enable on-chip Brillouin scattering using both the single-pass and resonator geometry, is presented along with an outlook for photonic integration of Microwave Signal processing and gener- ation in other platforms.
Ninghua Zhu - One of the best experts on this subject based on the ideXlab platform.
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Reconfigurable Microwave Signal processor with a phase shift of π.
Optics express, 2018Co-Authors: Hao Sun, Xinyi Zhu, Ninghua ZhuAbstract:We propose and experimentally demonstrate a reconfigurable Microwave Signal processor, with a bandwidth up to tens of gigahertz. In this technique, any Microwave Signal processing function with a phase shift of π could be performed by shaping the input optical intensity spectrum. The phase shift of π is implemented by using a differential detection. Thanks to the broad bandwidth provided by the incoherent optical source and the high resolution of the user-defined optical filter, the frequency response of our approach could be in a great agreement with that of an ideal Signal processing function. In the experiment, temporal intensity Hilbert transformations and temporal intensity differentiations of Gaussian-like pulses with widths of 125ps, 85ps and 68ps are accurately achieved.
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reconfigurable single shot incoherent optical Signal processing system for chirped Microwave Signal compression
Chinese Science Bulletin, 2017Co-Authors: Shuqian Sun, Jianping Yao, Ninghua Zhu, Antonio Malacarne, Sophie Larochelle, Jose AzanaAbstract:We propose and demonstrate a reconfigurable and single-shot incoherent optical Signal processing system for chirped Microwave Signal compression, using a programmable optical filter and a multi-wavelength laser (MWL). The system is implemented by temporally modulating a specially shaped MWL followed by a suitable linear dispersive medium. A Microwave dispersion value up to 1.33 ns/GHz over several GHz bandwidth is achieved based on this approach. Here we demonstrate a single-shot compression for different linearly chirped Microwave Signals over several GHz bandwidth. In addition, the robustness of the proposed system when input RF Signals are largely distorted is also discussed.
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Multi-band local Microwave Signal generation based on an optical frequency comb generator
Optics Communications, 2015Co-Authors: Wen Ting Wang, Jianguo Liu, Wen Hui Sun, Wei Chen, Ninghua ZhuAbstract:Abstract We propose and experimental demonstrate a new method to generate multi-band local Microwave Signals based on an optical frequency comb generator (OFCG) by applying an optical sideband injection locking technique and an optical heterodyning technique. The generated Microwave Signal can cover multi bands from S band to Ka band. A tunable multiband Microwave Signal spanning from 5 GHz to 40 GHz can be generated by the beating between the optical carrier and injection locked modulation sidebands in a photodetector without an optical filter. The wavelength of the slave laser can be continuously and near-linearly adjusted by proper changing its bias current. By tuning the bias current of the slave laser, the wavelength of that is matched to one of the modulation sidebands of the OFCG. The performance of the arrangement in terms of the tunability and stability of the generated Microwave Signal is also studied.
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photonic Microwave Signal mixing technique using phase coherent orthogonal optical carriers for radio over fiber application
Optics Letters, 2014Co-Authors: Jianyu Zheng, Ninghua Zhu, Jianguo Liu, Jing Wang, Ming Zhu, Ze Dong, Xin Wang, Geekung ChangAbstract:An optical-assisted Microwave-mixing technique based on orthogonal and phase-coherent optical carriers is proposed and demonstrated. High-quality binary-phase-shift keying, amplitude-shift keying, and on-off keying Microwave modulation at 20 GHz implemented in the optical domain have been tested. The ultra-high-bandwidth response of the proposed mixing device is also analyzed and compared. The phase stability of the photonic Microwave Signal in the radio-over-fiber system is improved by the proposed Signal mixing technique.
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Photonic generation of arbitrarily phase-modulated Microwave Signals based on a single DDMZM
Optics express, 2014Co-Authors: Wen Ting Wang, Wen Hui Sun, Lixian Wang, Ninghua ZhuAbstract:We propose and demonstrate a compact and cost-effective photonic approach to generate arbitrarily phase-modulated Microwave Signals using a conventional dual-drive Mach-Zehnder modulator (DDMZM). One arm (arm1) of the DDMZM is driven by a sinusoidal Microwave Signal whose power is optimized to suppress the optical carrier, while the other arm (arm2) of the DDMZM is driven by a coding Signal. In this way, the phase-modulated optical carrier from the arm2 and the sidebands from the arm1 are combined together at the output of the DDMZM. Binary phase-coded Microwave pulses which are free from the baseband frequency components can be generated when the coding Signal is a three-level Signal. In this case, the precise π phase shift of the Microwave Signal is independent of the amplitude of the coding Signal. Moreover, arbitrarily phase-modulated Microwave Signals can be generated when an optical bandpass filter is attached after the DDMZM to achieve optical single-sideband modulation. The proposed approach is theoretically analyzed and experimentally verified. The binary phase-coded Microwave pulses, quaternary phase-coded Microwave Signal, and linearly frequency-chirped Microwave Signal are experimentally generated. The simulated and the experimental results agree very well with each other.
