Frequency tunable optoelectronic oscillator based on a directly modulated DFB semiconductor laser under optical injection.
Frequency tunable optoelectronic oscillator based on a directly modulated DFB semiconductor laser under optical injection.
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DOI：
10.1364/oe.23.020450
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发表时间：
2015-08
期刊：
影响因子：
3.8
通讯作者：
Peng Wang;Jintian Xiong;Tingting Zhang;Dalei Chen;P. Xiang;Jiling Zheng;Yunshan Zhang;Ruoming Li-Ruoming
中科院分区：
文献类型：
--
作者：
Peng Wang;Jintian Xiong;Tingting Zhang;Dalei Chen;P. Xiang;Jiling Zheng;Yunshan Zhang;Ruoming Li-Ruoming
提出了一种基于光注入下直接调制分布反馈（DFB）半导体激光器的频率可调谐光电振荡器，并进行了实验证明。通过光注入，DFB激光器的张弛振荡频率得到增强，其高调制效率可以实现射频阈值增益小于20 dB的环路振荡。 DFB激光器是一种封装为10GHz的商用半导体激光器，其封装限制可以通过光注入来克服。在我们的方案中，既不需要高速外部调制器，也不需要电带通滤波器，使得系统简单且成本低廉。通过调节主从激光器之间的注入比和频率失谐，产生频率调谐范围为 5.98 至 15.22 GHz 的微波信号。所生成的 9.75 GHz 微波信号的相位噪声经测量为 -104.8 dBc/Hz @ 10 kHz 频率偏移。
A frequency tunable optoelectronic oscillator based on a directly modulated distributed-feedback (DFB) semiconductor laser under optical injection is proposed and experimentally demonstrated. Through optical injection, the relaxation oscillation frequency of the DFB laser is enhanced and its high modulation efficiency can enable the loop oscillation with a RF threshold gain of less than 20 dB. The DFB laser is a commercial semiconductor laser with a package of 10 GHz, and its packaging limitation can be overcome by optical injection. In our scheme, neither a high-speed external modulator nor an electrical bandpass filter is required, making the system simple and low-cost. Microwave signals with a frequency tuning range from 5.98 to 15.22 GHz are generated by adjusting the injection ratio and frequency detuning between the master and slave lasers. The phase noise of the generated 9.75 GHz microwave signal is measured to be -104.8 dBc/Hz @ 10 kHz frequency offset.