A5025950452- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Optical Wireless Communication Technologies
- Advanced Fiber Optic Sensors
- Advanced Sensor Technologies Research
- Orbital Angular Momentum in Optics
- Advanced Measurement and Detection Methods
- Scientific Measurement and Uncertainty Evaluation
- Chaos-based Image/Signal Encryption
- Advanced Research in Systems and Signal Processing
- Laser Design and Applications
Institute of Semiconductors
2020-2025
Chinese Academy of Sciences
2020-2025
University of Chinese Academy of Sciences
2020-2024
State Key Laboratory on Integrated Optoelectronics
2020-2024
A widely tunable narrow-linewidth laser consisting of a sampled-grating distributed Bragg reflector (SG-DBR) and an external silica-based multi-period-delayed feedback (MPDF) photonic circuit is fabricated experimentally demonstrated. The measured results show that 58-nm lasing wavelength tuning range together with more than 40 dB side-mode suppression ratio can be achieved. Notably, among the range, all linewidths remain below 1 kHz, which are narrowed by three orders magnitude compared to...
A secure fiber-optic communication system based on Internet-accessible multipath transmission of ciphertext fragment (MTCF) technology is proposed and demonstrated in this paper. By performing algorithm encryption the transmitted data before randomly assigning them to multiple channels corresponding different wavelengths or Internet protocols (IPs), long-distance can be realized. field trial experiment over 125 km between Beijing Xiongan has been successfully undertaken, results show that...
We report a photonic approach to generate background-free multi-format dual-band microwave signals based on single modulator, which is suitable for high-precision and fast detection of radars in complex electromagnetic environments. By applying different radio-frequency electrical coding the polarization-division multiplexing Mach-Zehnder modulator (PDM-MZM), generation dual-chirp or phase-coded pulse centered at 10 15.5 GHz experimentally demonstrated. Furthermore, by choosing an...
We propose and demonstrate a high-precision phase noise analysis method based on photonic-assisted microwave shifter (MPS) without nonlinear distortions (NPD). The proposed scheme utilizes dual parallel Mach Zehnder modulator (DPMZM) an optical bandpass filter (OBPF) to implement the photon-assisted shifter. To avoid additional frequency induced by fluctuations of carrier, we employ dispersion compensation photonic delay line as component. MPS operates in single sideband modulation (OSSB)...
The operation of the device is affected by increase in temperature caused rough electrodes surface thinfilm lithium niobate modulator. We have developed simulation models to analyze relationship between roughness and maximum gold examine influence snowball radius area ratio on temperature. results indicate that both affect change, with being greater than within range 2-6nm a 1.6-2.5, respectively.
We propose and demonstrate a highly efficient photonic-assisted microwave signal harmonic frequency down- conversion using four-wave mixing (FWM) in silicon waveguide with reverse-biased P-i-N junction. The FWM phenomenon occurred the integrated due to doped regions of junction can increase efficiency free carrier removal from region. Correspondingly, is up 12.8 dB bias voltage 30 V. fully packaged grating coupling fiber array wire-bonded printed circuit board (PCB). By simply adjusting...
In this paper, we investigate and experimentally demonstrate the filter parameters' effect on performance of typical all-optical thresholding (AOT) system. By establishing a conceptual scheme, AOT's output power, waveform, power transform function, as well bit-error-rate are measured analyzed with different parameters including center wavelength passband width, while available researches mainly focus employing various fibers. We typically select 1567, 1576, 1585, 1594, 1603 nm, each...
Researchers have developed a uniform grating DFB with an integrated active optical feedback waveguide (UG-AFDFB) to enhance the modulation speed of direct lasers (DMLs) while reducing costs based on identical layer designations. However, this design has difficulties in obtaining high single mode yield (SMY) and low relative intensity noise (RIN) as result strong caused by (AFW) random phase facet phase. In paper, partial corrugated (PG-AFDFB) is proposed address issue. Comparison SMY, S21,...
In this paper, a hybrid optical frequency hopping system based on OAM multiplexing is proposed, which mainly applied to the security of free space communication. proposed scheme, segmented users’ data goes through two stages successively realize hiding. And performance also analyzed in paper.
We investigate on the wideband phase-modulation to amplitude-modulation (PM-AM) conversion based chromatic dispersion in fiber. To overcome shortcomings of single-tone or dual-tone modulation-based model previous researches, we present a more intuitive time-frequency analysis method for propagation phase-modulated signals dispersive fibers, and give physical picture temporal waveform changes. By analyzing amplitude variation near transition zone, establish bit-by-bit correspondence between...
A novel optical frequency-hopping (OFH) scheme using dual-drive Mach-Zehnder modulator (DD-MZM) is proposed and demonstrated for secure transmission in fiber-optic networks. In the scheme, by adjusting phase difference between radio frequency (RF) signals loaded on two arms of DD-MZM, filtering center carrier fiber Bragg grating (FBG), thus upper lower output spectra can be realized randomly hop positive negative first-order sidebands serve as carriers data modulation. And different users...