Synchronous or lock-in amplifier detections are an essential part of research laboratories in areas such as optics and photonics, nanotechnology and materials science, local probe microscopy and sensors. Since synchronous detection can extract very weak signals buried in noise, it is possible to discover new phenomena and extend the scope of experimental manipulations. The operating principle of synchronous sensing, called demodulation or phase-sensitive detection, is based on mixing the measured signal with a reference frequency followed by low-pass filtering.
Opton Laser's partner, Zurich instruments, offers a wide range of synchronous sensing with different frequency ranges. MFLI DC-500 kHz/5MHz, HF2LI DC-50MHz and UHFLI DC-600 MHz.
Two new synchronous detection products at GHz frequencies: GHFLI DC-1.8 GHz and SHFLI DC-8.5 GHz.
The GHFLI and SHFLI each contain two physical entries that function as two independent lock-ins. Each input is equipped with 4 demodulators that allow multi-harmonic and multi-frequency parallel analysis, and a 6 GSa/s signal generator for control and reference signals. The filters of the demodulators can be adjusted to achieve the best compromise between noise rejection and measurement speed. USB and gigabit Ethernet digital interfaces enable continuous data transfer to the computer at up to 4 MSa/s, while 4 high-speed, high-precision auxiliary outputs convert measurement results, with custom scaling and offset, into analog signals for integration with other instruments.
All synchronous detections from Zurich Instruments are equipped with the LabOne user interface, which makes their configuration easy and convenient thanks to its graphical user interface. This interface also makes it possible to control all measurement tools, which include lock-ins: a two-input oscilloscope with FFT, a real-time data plotter, a DAQ module, a spectrum analyzer and a parametric scanner. In addition, all features and data acquisition are accessible through major programming languages for easy integration: LabView, Matlab, C, .Net, and Python are supported.