Study on Ultra-high Frequency-Stabilization Techniques of Tunable Dye Lasers

1987年，J.L.Hall博士的实验室研究了稳频技术，结果表明，采用外相位调制器和声光调制器的商用染料激光器的外稳频足以达到千赫数量级的稳定。射频边带技术是获得低噪声误差信号的有力手段。为了进一步稳定，需要一个腔内AD^*P相位调制器。1988年，我们利用现有的光学腔在实验室组装了一个外部稳定系统。通过初步的实验设置，将商用染料激光器的频率波动降低到170KHz。设计了一种用于参考腔的Fabry Perot谐振器。我们邀请了j·l·霍尔博士来我们的实验室。他对我们的系统提出了许多建议，我们讨论了利用亚自然线宽光谱技术提高他实验室开发的交叉相关光谱分辨率的可能性。

In 1987, techniqus of frequency stabilization were studied in the laboratory of Dr. J.L.Hall, It has become clear that the external stabilization of commercial dye laser with external phase modulator and acousto-optical modulator is adequate to obtain the stabilization of order of KHz. The rf sideband technique is powerful to obtain a low noise error signal. For further stabilization an intracavity AD^*P phase modulatoris required. In 1988, an external stabilization system was as-sembled in our laboratory using existing optical cavity. With this preliminary ex-perimenal setup, the frequency fluctuation of commercial dye laser was reduced to 170KHz. A Fabry Perot resonator for reference cavity was designed. We invited Dr.J.L.Hall to our laboratory. He gave us many advices about our system and we dis-cussed the possibility to improve the resolution of cross correration spectroscopy which had been developed in his laboratory using the technique of subnatural linewidth spectroscopy.