Filterless low-phase-noise frequency-quadrupled microwave generation based on a multimode optoelectronic oscillator

Yichao Teng; Pin Zhang; Baofu Zhang; Yiwang Chen

doi:10.1117/1.OE.57.2.026115

22 February 2018 Filterless low-phase-noise frequency-quadrupled microwave generation based on a multimode optoelectronic oscillator

Yichao Teng, Pin Zhang, Baofu Zhang, Yiwang Chen

Author Affiliations +

Optical Engineering, Vol. 57, Issue 2, 026115 (February 2018). https://doi.org/10.1117/1.OE.57.2.026115

Abstract

A scheme to realize low-phase-noise frequency-quadrupled microwave generation without any filter is demonstrated. In this scheme, a multimode optoelectronic oscillator is mainly contributed by dual-parallel Mach–Zehnder modulators, fiber, photodetector, and microwave amplifier. The local source signal is modulated by a child MZM (MZM_a), which is worked at maximum transmission point. Through properly adjusting the bias voltages of the other child MZM (MZM_b) and the parent MZM (MZM_c), optical carrier is effectively suppressed and second sidebands are retained, then the survived optical signal is fed back to the photodetector and MZM_b to form an optoelectronic hybrid resonator and realize frequency-quadrupled signal generation. Due to the high Q-factor and mode selection effect of the optoelectronic hybrid resonator, compared with the source signal, the generated frequency-quadrupled signal has a lower phase noise. The approach has verified by experiments, and 18, 22, and 26 GHz frequency-quadrupled signal are generated by 4.5, 5.5, and 6.5 GHz local source signals. Compared with 4.5 GHz source signal, the phase noise of generated 18 GHz signal at 10 kHz frequency offset has 26.5 dB reduction.

Citation Download Citation

Yichao Teng, Pin Zhang, Baofu Zhang, and Yiwang Chen "Filterless low-phase-noise frequency-quadrupled microwave generation based on a multimode optoelectronic oscillator," Optical Engineering 57(2), 026115 (22 February 2018). https://doi.org/10.1117/1.OE.57.2.026115

Received: 10 October 2017; Accepted: 19 January 2018; Published: 22 February 2018

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KEYWORDS

Optoelectronics

Microwave radiation

Resonators

Interference (communication)

Signal generators

Oscillators

Fiber amplifiers

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