论文标题
奥利亚：开源数字锁定放大器
OLIA: an open-source digital lock-in amplifier
论文作者
论文摘要
开放锁定放大器（OLIA）是一种基于微控制器的数字锁定放大器，该放大器是由少数廉价且易于采购的电子组件构建的。尽管其信用卡大小的形式因子和低建造成本约为35美元，但Olia还是一款功能强大的工具，提供了许多与昂贵的商业设备相关的功能。关键功能包括多个谐波频率的双相锁定检测，最多50 kHz，内部和外部参考模式，可调节级别的输入增益，低通滤波和同步过滤之间的选择，噪声估计以及用于远程软件控制的全面编程界面。奥利亚（Olia）配备了可选的光突破板，可将噪声耐噪声检测降低到40 PW级别。 Olia及其突破板以开放硬件的形式发布，其中提供了技术图，完整的零件列表和作为支持信息提供的固件的源代码。
The Open Lock-In Amplifier (OLIA) is a microcontroller-based digital lock-in amplifier built from a small number of inexpensive and easily sourced electronic components. Despite its small credit card-sized form-factor and low build-cost of around US$35, OLIA is a capable instrument that offers many features associated with far costlier commercial devices. Key features include dual-phase lock-in detection at multiple harmonic frequencies up to 50 kHz, internal and external reference modes, adjustable levels of input gain, a choice between low-pass filtering and synchronous filtering, noise estimation, and a comprehensive programming interface for remote software control. OLIA comes with an optional optical breakout board that allows noise-tolerant optical detection down to the 40 pW level. OLIA and its breakout board are released here as open hardware, with technical diagrams, full parts-lists, and source-code for the firmware provided as Supporting Information.
