Photonic chirped radio-frequency generator with ultra-fast sweeping rate and ultra-wide sweeping range

Jhih Min Wun, Chia Chien Wei, Jyehong Chen, Chee Seong Goh, S. Y. Set, Jin Wei Shi

Research output: Contribution to journalArticle

37 Scopus citations

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.

Original languageEnglish
Pages (from-to)11475-11481
Number of pages7
JournalOptics Express
Volume21
Issue number9
DOIs
StatePublished - 6 May 2013

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