研究目的
To develop and test a frequency agile photonic front-end for up- and down-conversion of signals with wide instantaneous bandwidth, fast switching speed, and low latency.
研究成果
The frequency-agile photonic front-end was successfully designed, fabricated, and tested, demonstrating carrier agility up to 45 GHz, over 800 MHz digitizer-limited instantaneous signal bandwidth, less than 1 us carrier switching speed, and low end-to-end signal latency.
研究不足
The reliance on high size weight and power (SWaP) RF filtering and the inefficiency in power usage as only one combline is used as the LO at any given time.
1：Experimental Design and Method Selection:
The system utilizes an optical pulse source or photonic comb for precise timing and phase-coherent local oscillators.
2：Sample Selection and Data Sources:
Custom pulse-carving source from RAM Photonics with a 10 GHz repetition rate and <
3：0 ps pulsewidth. List of Experimental Equipment and Materials:
Balanced photodiode (Finisar BPDV2120R), EOSpace lithium niobate 40 GHz dual output intensity modulator, K&L Microwave custom filter bank.
4：Experimental Procedures and Operational Workflow:
The system was tested in a TRL6 demonstration at X-band, measuring signal-to-harmonic spur ratio and dynamic range.
5：Data Analysis Methods:
Performance metrics such as switching time and dynamic range were measured and analyzed.
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