Self-oscillating triangular pulse generator based on 90° photonic-assisted phase shifter

Jian Dai, Xingyuan Xu, Jinlong Ke, Jie Yin, Yitang Dai, Feifei Yin, Yue Zhou, Jianqiang Li, Yuting Fan, Kun Xu

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3 Citations (Scopus)


In this letter, we proposed and experimentally demonstrated a novel self-oscillating triangular pulse generator based on a 90° photonic-Assisted phase shifter. The fundamental harmonic is produced by the optoelectronic oscillation loop for generating triangular pulses. Meanwhile, the even-order harmonic suppression and the phase matching between odd-order harmonics are simultaneously realized by carrier phase-shifted double sideband modulation using a dual-parallel Mach-Zehnder modulator. Furthermore, the nine times amplitude ratio between the fundamental and third-order harmonics can be achieved by properly tuning the gain of the open oscillation loop. In the proof-of-concept experiment, self-oscillating triangular pulses with the repetition rates of 4 and 5.7 GHz are successfully generated with the phase noises of about-114 and-122 dBc/Hz at 10-kHz offset frequency. The corresponding root-mean-square errors between the generated and the ideal triangular waveforms are 5.9777e-4 and 6.0002e-4, respectively.

Original languageEnglish
Pages (from-to)271-274
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number3
Publication statusPublished - 1 Feb 2017
Externally publishedYes


  • microwave photonics
  • optoelectronic oscillator
  • Triangular pulses generation

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