Low-cost and wideband frequency tunable optoelectronic oscillator based on a directly modulated distributed feedback semiconductor laser.
Low-cost and wideband frequency tunable optoelectronic oscillator based on a directly modulated distributed feedback semiconductor laser.
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DOI：
10.1364/ol.38.004128
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发表时间：
2013-10
期刊：
影响因子：
3.6
通讯作者：
Jintian Xiong;Rong Wang;Tao Fang;T. Pu;Dalei Chen;Lin Lu;P. Xiang;Jiling Zheng;Jiyong Zhao-Jiyong-Zha
中科院分区：
文献类型：
--
作者：
Jintian Xiong;Rong Wang;Tao Fang;T. Pu;Dalei Chen;Lin Lu;P. Xiang;Jiling Zheng;Jiyong Zhao-Jiyong-Zha
提出了一种基于直接调制分布反馈(DFB)半导体激光器实现低成本、宽带频率可调的光电振荡器的新方案，并进行了实验验证。在该方案中，由于DFB激光器弛豫振荡频率的高调制效率，该方案不使用外部调制器，也不使用电滤波器，所需的电环增益不超过25dB。通过改变DFB激光器的偏置电流和工作温度，产生了频率在3.77~8.75 GHz之间的微波信号。产生的6.97 GHz微波信号的单边带相位噪声为-103.6 dBc/hz，偏移量为10 kHz。
A novel scheme to realize a low-cost and wideband frequency tunable optoelectronic oscillator based on a directly modulated distributed feedback (DFB) semiconductor laser is proposed and experimentally demonstrated. In the proposed scheme, neither an external modulator nor an electrical filter is used, and no more than 25 dB of the electrical loop gain is required due to the high modulation efficiency of the relaxation oscillation frequency of the DFB laser. Microwave signals with frequency coarsely tuned from 3.77 to 8.75 GHz are generated by changing the bias current and operation temperature of the DFB laser. The single sideband phase noise of the generated 6.97 GHz microwave signal is measured to be -103.6 dBc/Hz at 10 kHz offset.