Lock-In Electronics

The National Institute of Standards and Technology (NIST) is seeking a digital lock-in amplifier system to support various applications, including electro-optic sampling, frequency-comb stabilization, and waveform metrology. The system should provide high-sensitivity phase-sensitive detection and real-time digital signal processing. The required specifications include a frequency range of DC to 50 MHz, two independent analog input channels, and multiple simultaneous demodulators. The system should also have integrated PID controllers, synchronized data acquisition, and advanced digital filtering capabilities. • The system must support demodulation and measurement of low-level optical and electrical signals with high dynamic reserve, low noise, and stable phase detection. • The system should provide flexible external triggering, high-speed data streaming, and software interfaces compatible with automated laboratory control and long-term measurement operation. • The lock-in amplifier is required to support development of SI-traceable electro-optic waveform measurements, frequency-comb-based metrology, optical-to-electrical signal characterization, and advanced feedback control architectures used in ultrafast photonics and timing applications.