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研究了一种新型的短腔铒镱共掺单纵模调频光纤激光器,推导了该类光源利用零差检测法时功率谱密度的理论表达式,进行了数值模拟,计算出了最大频偏量.激光器是由一段4 cm长的铒镱共掺光纤和两个窄线宽光纤布拉格光栅构成,通过对靠近抽运端光栅的长度调制实现了激光的频率调制.激光器线宽小于400 kHz,输出功率大于3 mW,最大频偏可以达到55 MHz,最大频偏量的实验结果与理论分析一致.

参考文献

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