Ginzton Laboratory, Stanford University, Stanford, California 94305-4088, USA.
Opt Lett. 2011 Mar 15;36(6):933-5. doi: 10.1364/OL.36.000933.
In this Letter we show that interferometers with unbalanced arm lengths can be balanced using optical elements with appropriate group delays. For matched group delays of the arms, the balanced interferometer becomes insensitive to the frequency noise of the source. For experimental illustration, a ring resonator is employed as a slow-light element to compensate the arm-length mismatch of a Mach-Zehnder interferometer. An arm-length mismatch of 9.4 m is compensated by a ring resonator with a finesse of 70 and a perimeter of 42 cm.
在这封信件中，我们展示了不平衡臂长的干涉仪可以使用具有适当群延迟的光学元件进行平衡。对于臂的匹配群延迟，平衡干涉仪对光源的频率噪声不敏感。为了实验说明，环形谐振器被用作慢光元件来补偿马赫-曾德尔干涉仪的臂长失配。一个 9.4 米的臂长失配可以通过一个 70 精细度和 42 厘米周长的环形谐振器来补偿。
