Abstract
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.
Original language | English |
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Article number | 6225421 |
Pages (from-to) | 1437-1439 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 24 |
Issue number | 16 |
DOIs | |
State | Published - 2012 |
Keywords
- Millimeter wave (MMW)
- photonic transmitter (PT)
- pulse shaping
- terahertz (THz)