Photonic full-range phase shifter with simultaneous tunable frequency multiplying capability based on a DMZM

Abstract

In this paper, a novel microwave photonic full-range phase shifter with simultaneous frequency-multiplying capability is proposed. The main device is a dual-drive Mach–Zehnder modulator (DMZM) embedded in a Sagnac loop. Under the assistance of two electrical phase shifters (EPS) and a following polarizer (Pol), the optical carrier is eliminated with desired phase tunable carrier-suppressed double-sideband (CS-DSB) signal reserved. So after photoelectric conversion, the frequency-multiplied phase tunable signals are generated. The frequency multiplication factor (FMF) switching and phase tuning operation of multiplied signals can be achieved  easily by adjusting the corresponding  EPS. The simulation results show that the proposed structure driven by a 10 GHz RF signal can generate a frequency-doubled signal (20 GHz) or frequency-quadrupled signal (40 GHz) that features full-phase tunable range and flat power response. What is more, the proposed phase shifter has a relatively good robustness to the non-ideal factors, large frequency operation range and good frequency tunable capability.

KEYWORDS:

• Frequency multiplication factor
• frequency-multiplying capability
• microwave photonics
• phase shifter

Disclosure statement

No potential conflict of interest was reported by the authors.

Acknowledgements

This research was supported by the National Natural Science Foundation of China (no. 61571461), and (no. 61231012), Natural Science Foundation of Shaanxi Province (no. 2019JQ707), Project of Science and Technology New Star of Shaanxi Province (no. 2019KJXX-082).

Additional information

Funding

This research was supported by the National Natural Science Foundation of China [grant number 61571461], and [grant number 61231012], Natural Science Foundation of Shaanxi Province [grant number 2019JQ707], Project of Science and Technology New Star of Shaanxi Province [grant number 2019KJXX-082].