IEEE Photonics Journal (Jan 2010)

Spectral Power Enhancement in a 100 GHz Photonic Millimeter-Wave Generator Enabled by Spectral Line-by-Line Pulse Shaping

  • F.-M. Kuo,
  • J.-W. Shi,
  • H.-C. Chiang,
  • H.-P. Chuang,
  • H.-K. Chiou,
  • C.-L. Pan,
  • N.-W. Chen,
  • H.-J. Tsai,
  • C.-B. Huang

DOI
https://doi.org/10.1109/JPHOT.2010.2064160
Journal volume & issue
Vol. 2, no. 5
pp. 719 – 727

Abstract

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We report generation of high-modulation-depth photonic millimeter-wave (MMW) waveforms by applying line-by-line pulse shaping on a phase-modulated continuous-wave frequency comb. The optimized 20 and 100 GHz optical waveforms are then converted into electrical MMW signals using a near-ballistic uni-traveling-carrier photodiode (NBUTC-PD). A 7.4 dB MMW power enhancement is experimentally achieved by using 2.6 ps optimized pulses at a 100 GHz repetition rate, as compared with excitation by a conventional sinusoidal signal for the NBUTC-PD operated at the same photocurrent. This is in qualitative agreement with a theoretical analysis of spectral power enhancement by optical short pulses comprised of equi-amplitude frequency lines over sinusoidal excitation.

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