Author Affiliations
Abstract
1 Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China
2 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
We demonstrate a proposal for making an ultrastable laser referenced to a multi-cavity, enabling a lower thermal noise limit due to the averaging effect. In comparison with a single-cavity system, relative frequency instability of the synthesized laser can be improved by a factor of the square root of the cavity number. We perform an experiment to simulate a two-cavity system with two independent ultrastable lasers. Experimental results show that the relative frequency instability (Allan deviation) of the synthesized laser is 5 × 10 16, improved by a factor of √2 from a single-cavity-stabilized laser.
140.4780 Optical resonators 120.4820 Optical systems 140.3518 Lasers, frequency modulated Chinese Optics Letters
2018, 16(12): 121403
1 陕西科技大学电气与信息工程学院, 陕西 西安 710021
2 中科院国家授时中心时间频率基准重点实验室, 陕西 西安 710600
3 中国科学院大学, 北京 100049
4 西安石油大学理学院, 陕西 西安 710065
飞秒激光器是激光频率测量系统——飞秒光梳的核心部件，其噪声、重复频率、脉冲宽度、光谱等参数决定了它在应用中的表现。报道了用于9.2 GHz基于光学腔超稳微波源的掺铒光纤飞秒激光器的研制。该激光器采用环形腔结构，重复频率为186 MHz，直接输出功率为120 mW，光谱中心波长为1550~1600 nm。采用动态信号分析仪测试了双边带噪声功率谱，结果显示：研制的飞秒激光器自由运转时，1 Hz处双边带幅度噪声为-118 dBc/Hz，在10 Hz到100 kHz频率范围内幅度噪声小于-130 dBc/Hz。
激光器 光纤激光器 锁模激光器 幅度噪声 频率稳定度
