OE Letters

Reducing the noise floor in optoelectronic oscillator by optimizing the operation of modulator

[+] Author Affiliations
Guochuan Tong, Tao Jin, Hao Chi, Junchao Zheng, Xiang Zhu, Tianhao Lai, Xidong Wu, Zhiguo Shi

Zhejiang University, College of Information Science and Electronic Engineering, 38 Zheda Road, Hangzhou 310027, China

Opt. Eng. 55(10), 100504 (Oct 28, 2016). doi:10.1117/1.OE.55.10.100504
History: Received July 25, 2016; Accepted October 11, 2016
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Abstract.  An intensity modulator is a key component in an optoelectronic oscillator (OEO). It is necessary to investigate the effects of some of the operating parameters of the modulator on OEO phase noise. Since the OEO optimized oscillation power is related to the nonlinear effect of the modulator, an extended analysis is made by considering both the saturation effects of the modulator and the radio frequency amplifier. Experimental results show that a 5-dB improvement of phase noise performance is achieved. In addition, a theoretical and experimental study on the DC bias-drifting problem of the modulator and its induced phase noise fluctuations is proposed. It is found that the saturated operation of the amplifier is helpful in reducing the fluctuation range. The presented results can be used to guide the design of high-quality OEOs.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Guochuan Tong ; Tao Jin ; Hao Chi ; Junchao Zheng ; Xiang Zhu, et al.
"Reducing the noise floor in optoelectronic oscillator by optimizing the operation of modulator", Opt. Eng. 55(10), 100504 (Oct 28, 2016). ; http://dx.doi.org/10.1117/1.OE.55.10.100504


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