论文部分内容阅读
提出了一种基于单环光电振荡器(OEO)的宽带二倍频信号产生方法。将射频(RF)信号经过第1级马赫-增德尔调制器(MZM)调制到光信号上,通过控制第1级MZM的偏置电压,使得其工作在最小传输点(MITP)上,产生的-1阶和+1阶边带信号通过第2级MZM注入到由单膜光纤(SMF)、光电检测器(PD)和电放大器(amplifier)组成的光电振荡环腔中,光电检测后产生二倍频信号,信号的频率稳定度由信号源的稳定度决定,信号的相位噪声由光电振荡环腔决定。在实验结构简单的条件下,有效实现了宽带二倍频信号产生。实验结果表明,当本文系统可以实现对C波段和X波段信号二倍频,输出信号的相位噪声在10kHz偏移处均低于-102dBc/Hz。
A method based on single-ring optical oscillator (OEO) for generating double-frequency broadband signal is proposed. The radio frequency (RF) signal through the first Mach-Zehnder modulator (MZM) modulation to the optical signal by controlling the bias voltage of the first stage MZM, making it work at the minimum transmission point (MITP), the resulting The -1 order and +1 order sideband signals are injected into the opto-electronic resonator ring cavity consisting of a single-film optical fiber (SMF), a photodetector (PD) and an amplifier through a 2 nd stage MZM. After photodetection, Frequency multiplied signal, the frequency stability of the signal is determined by the stability of the signal source, the phase noise of the signal determined by the optical oscillation ring cavity. Under the condition of simple experimental structure, the generation of broadband double frequency signal is effectively realized. The experimental results show that the phase noise of the output signal is lower than -102dBc / Hz at 10kHz offset when the C-band and X-band signals are doubled.