A5048059154- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Advanced Optical Sensing Technologies
- Photonic and Optical Devices
- Advanced Sensor Technologies Research
- Scientific Measurement and Uncertainty Evaluation
- Advanced Measurement and Detection Methods
- Spectroscopy Techniques in Biomedical and Chemical Research
- Mechanical and Optical Resonators
- Non-Invasive Vital Sign Monitoring
Institute of Semiconductors
2022-2025
Chinese Academy of Sciences
2022-2025
University of Chinese Academy of Sciences
2022-2024
State Key Laboratory on Integrated Optoelectronics
2022-2023
We propose a microwave photonic scheme to generate rectangular and triangular waveforms by external modulation. Different from previous works, the duty circle of generated in our is freely tunable. The main structure based on Mach-Zehnder modulator tunable optical delay line. By power splitting time-delay tuning two polarization branches, or can be obtained superposition beating signals. Moreover, RF modulation index this work unfixed, which increases flexibility system. proposed...
We propose a compact photonic system based on dual-polarization dual-drive Mach–Zehnder modulator (DP-DDMZM) to measure Doppler-frequency-shift (DFS) and angle-of-arrival (AOA). Compared previous research, the key innovation of our is that self-interference signals can be eliminated while maintaining excellent measurement performance. The sub-DDMZMs are driven by echo reference two intermediate frequency (IF) generated after photoelectric detection from orthogonal polarization channels. By...
We report a dual-frequency actively mode-locked optoelectronic oscillator (AML-OEO) which can generate MFCs with more comb lines and wider spectrum bandwidth. For traditional single-frequency AML-OEO, normally, there is tradeoff between bandwidth lines. In addition, our also be flexibly tuned by adjusting the frequency of injection signals. The proposed scheme theoretically analyzed experimentally demonstrated. same line spacing 661.01 kHz, experiment results show that increase from 7...
A compact photonics-assisted scheme for short-time Fourier transform (STFT) is proposed and experimentally demonstrated. In the scheme, a periodic chirp signal an electrical bandpass filter (BPF) are applied to achieve sliding window function. At same time, BPF utilized realize frequency-to-time mapping obtain frequency-domain information in each time window. The STFT can be realized by splicing corresponding different windows into two-dimensional time-frequency graph. Experimentally, STFTs...
We report a simple photonic-assisted triangular and square microwave waveforms generator with tunable duty ratio by utilizing dual-polarization Mach-Zehnder modulator (DPol-MZM). The RF signal provided the source is split into two paths to drive <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</i> -MZM xmlns:xlink="http://www.w3.org/1999/xlink">y</i> -MZM, respectively. An electrical phase shifter (PS) an attenuator are inserted these...
We propose and demonstrate a microwave frequency identification system based on frequency-to-time mapping (FTTM) cross-correlation. The unknown signals the bidirectional chirped probe signal are mixed by using dual-drive Mach-Zehnder modulator. mixing products equivalently selected dispersion induced photonic filter converted into electrical pulses in time domain. is measured calculating interval of pulses. Moreover, scheme cross-correlation proposed to eliminate noise interference for pulse...
We propose a microwave photonic temperature interrogation system with high resolution and sensitivity based on temperature-to-time mapping simple structure. In this work, bidirectional chirped optical signal is constructed, the information mapped to time interval change of output pulses by filtering using transmission spectrum Fabry-Perot filter. Only low-speed oscilloscope required extract in proposed scheme, complex data processing as well synchronizing processes are avoided....
We propose and demonstrate a photonic scheme to generate dual-band dual-format phase-coded microwave signals based on commercial dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM), which consists of two sub-DDMZMs with orthogonal polarization states. Two different frequencies are fed the sub-DDMZMs, separately. The power is optimized well suppress optical carrier at corresponding arms avoid interference between sub-DDMZMs. key novelty our that kinds phase-modulated can be...
We propose and demonstrate a photonic scheme to generate transmit dual-band dual-chirp microwave waveforms based on single dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM), which structure is simple compact. The center frequencies of the generated signals are frequency-doubling can be adjusted flexibly independently meet practical requirement radar systems. Moreover, chromatic dispersion-induced power fading (CDIP) eliminated by appropriately adjusting direct current biases...