Dipartimento di Fisica—Politecnico di Milano, Polo di Lecco, Via Ghislanzoni 24, 23900 Lecco, Italy.
Opt Lett. 2012 Jul 1;37(13):2592-4. doi: 10.1364/OL.37.002592.
Wide-bandwidth phase lock between the tooth of a frequency comb and a CW extended-cavity diode laser at 1.55 μm is achieved by the use of an acousto-optical frequency shifter in a feed-forward configuration. The coherence properties of the comb are efficiently transferred to the CW laser, whose linewidth is narrowed down to the ∼10 KHz comb level. A maximum control bandwidth of ∼0.6 MHz has been experimentally achieved, limited by the transit time of the acoustic wave inside the frequency shifter.
通过在前馈配置中使用声光频移器，实现了 1.55 μm 频率梳的齿与 CW 扩展腔二极管激光器之间的宽带宽相位锁定。梳的相干特性有效地传递到 CW 激光，其线宽被减小到约 10 KHz 梳级。实验上实现了最大控制带宽约 0.6 MHz，这受到频率移相器中声波传输时间的限制。
