title: Photonic chirped radio-frequency generator with ultra-fast sweeping rate and ultra-wide sweeping range.
abstract: A high-performance photonic sweeping-frequency (chirped) radio-frequency (RF) generator has been demonstrated. By use of a novel wavelength sweeping distributed-feedback (DFB) laser, which is operated based on the linewidth enhancement effect, a fixed wavelength narrow-linewidth DFB laser, and a wideband (dc to 50 GHz) photodiode module for the hetero-dyne beating RF signal generation, a very clear chirped RF waveform can be captured by a fast real-time scope. A very-high frequency sweeping rate (10.3 GHz/μs) with an ultra-wide RF frequency sweeping range (~40 GHz) have been demonstrated. The high-repeatability (~97%) in sweeping frequency has been verified by analyzing tens of repetitive chirped waveforms.
authors.affiliation: Department of Electrical Engineering, National Central University, Jhongli, 320, Taiwan.
authors.forename: Jhih-Min
authors.initials: JM
authors.lastname: Wun
authors.forename: Chia-Chien
authors.initials: CC
authors.lastname: Wei
authors.forename: Jyehong
authors.initials: J
authors.lastname: Chen
authors.forename: Chee Seong
authors.initials: CS
authors.lastname: Goh
authors.forename: S Y
authors.initials: SY
authors.lastname: Set
authors.forename: Jin-Wei
authors.initials: JW
authors.lastname: Shi
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005246:Feedback; D007834:Lasers; D009991:Oscillometry / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*