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IEEE photonics technology letters : a publication of the IEEE Laser and Electro-optics Society v.29 no.3, 2017년, pp.271 - 274   SCI SCIE
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Self-Oscillating Triangular Pulse Generator Based on 90° Photonic-Assisted Phase Shifter

Jian Dai (State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China ); Xingyuan Xu ( State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China ); Jinlong Ke ( State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China ); Jie Yin ( Beijing Inst. of Satellite Inf. Eng., Beijing, China ); Yitang Dai ( State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China ); Feifei Yin ( State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China ); Yue Zhou ( State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China ); Jianqiang Li ( State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China ); Yuting Fan ( State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China ); Kun Xu ( );
  • 초록  

    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.


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