Doret S Charles
Department of Physics, Williams College, Williamstown, Massachusetts 01267, USA.
Rev Sci Instrum. 2018 Feb;89(2):023102. doi: 10.1063/1.5009643.
We present an inexpensive, low-noise (<260 μV, 0.1 Hz-100 kHz) design for a piezo driver suitable for frequency tuning of external-cavity diode lasers. This simple driver improves upon many commercially available drivers by incorporating circuitry to produce a "feed-forward" signal appropriate for making simultaneous adjustments to the piezo voltage and laser current, enabling dramatic improvements in a mode-hop-free laser frequency tuning range. We present the theory behind our driver's operation, characterize its output noise, and demonstrate its use in absorption spectroscopy on the rubidium D line.
我们展示了一种用于外腔二极管激光器频率调谐的压电驱动器的低成本、低噪声（<260 μV，0.1 Hz - 100 kHz）设计。这种简单的驱动器通过集成电路产生一个“前馈”信号，该信号适合同时调整压电电压和激光电流，从而在许多市售驱动器的基础上进行了改进，能够显著扩大无模式跳变的激光频率调谐范围。我们阐述了驱动器工作背后的理论，表征了其输出噪声，并展示了其在铷D线吸收光谱中的应用。
