Title :
Photonic Microwave Generation With Frequency Octupling Based on a DP-QPSK Modulator
Author :
Yongsheng Gao ; Aijun Wen ; Wei Jiang ; Dong Liang ; Wenya Liu ; Shuiying Xiang
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´an, China
Abstract :
A photonic microwave signal generation scheme with frequency octupling is proposed and experimentally demonstrated using a dual-polarization quadrature phase shift keying modulator. By properly setting the phase difference between the two drive signals, the working points of the modulator, and the polarization state of the light wave after the modulator, an optical signal with only ±4th order sidebands is generated. A pure 24-GHz microwave signal with low-phase noise is experimentally obtained using a 3-GHz local oscillator signal. The proposed photonic frequency octupling system also exhibits good frequency tunability as no electrical or optical filter is used.
Keywords :
light polarisation; microwave generation; microwave photonics; optical modulation; optical noise; optical tuning; phase noise; quadrature phase shift keying; DP-QPSK modulator; drive signals; dual-polarization quadrature phase shift keying modulator; frequency 24 GHz; frequency 3 GHz; frequency tunability; light wave polarization state; local oscillator signal; low-phase noise; optical signal; photonic frequency octupling system; photonic microwave signal generation; Frequency modulation; Optical fibers; Optical filters; Optical modulation; Optical polarization; Photonics; DP-QPSK; DP-QPSK modulator; frequency octupling; microwave generation; microwave photonics; modulator; phase noise;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2459915
