摘要
Based on the frequency-to-time mapping approach, we generate frequency-modulated millimeter-wave (MMW) pulses with central frequencies up to the W-band by a shaped optical pulse excitation of an MMW photonic transmitter with an ultrawide band photodiode as its key component. A coherent detection is achieved via a terahertz time-domain spectroscopic setup. Two different kinds of chirped MMW waveforms are generated; one is a linearly chirped sinusoidal pulse and the other is produced by a frequency-stepped modulation. Through appropriate optical spectral design, the frequency-chirped MMW pulses with instantaneous frequencies sweeping from 120 to 60 GHz, and a time-bandwidth product of ∼25 is experimentally demonstrated.
原文 | ???core.languages.en_GB??? |
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文章編號 | 6225421 |
頁(從 - 到) | 1437-1439 |
頁數 | 3 |
期刊 | IEEE Photonics Technology Letters |
卷 | 24 |
發行號 | 16 |
DOIs | |
出版狀態 | 已出版 - 2012 |