Tillman Karl A, Thapa Rajesh, Knabe Kevin, Wu Shun, Lim Jinkang, Washburn Brian R, Corwin Kristan L
Kansas State University, Department of Physics, 116 Cardwell Hall, Manhattan, Kansas 66506, USA.
Appl Opt. 2009 Dec 20;48(36):6980-9. doi: 10.1364/AO.48.006980.
The frequency comb from a prism-based Cr:forsterite laser has been frequency stabilized using intracavity prism insertion and pump power modulation. Absolute frequency measurements of a CW fiber laser stabilized to the P(13) transition of acetylene demonstrate a fractional instability of approximately 2 x 10(-11) at a 1 s gate time, limited by a commercial Global Positioning System (GPS)-disciplined rubidium oscillator. Additionally, absolute frequency measurements made simultaneously using a second frequency comb indicate relative instabilities of 3 x 10(-12) for both combs for a 1 s gate time. Estimations of the carrier-envelope offset frequency linewidth based on relative intensity noise and the response dynamics of the carrier-envelope offset to pump power changes confirm the observed linewidths.
基于棱镜的Cr:镁橄榄石激光器产生的频率梳已通过腔内插入棱镜和泵浦功率调制实现了频率稳定。对稳定于乙炔P(13)跃迁的连续波光纤激光器进行的绝对频率测量表明，在1秒门控时间下，分数不稳定度约为2×10⁻¹¹，受商用全球定位系统（GPS）校准的铷振荡器限制。此外，使用第二个频率梳同时进行的绝对频率测量表明，对于1秒门控时间，两个频率梳的相对不稳定度均为3×10⁻¹²。基于相对强度噪声以及载波包络偏移对泵浦功率变化的响应动力学对载波包络偏移频率线宽的估计，证实了所观察到的线宽。
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