BRS-6800 optical chopper combines a position-feedback sensor with high-precision crystal frequency synthesis to modulate a continuous light beam with fast, highly stable periodic intensity modulation. The built-in position-feedback sensor synchronizes with the chopper blade rotation in real time, resulting in low long-term frequency drift and precise, stable frequency output.
The unit supports both single-frequency standard chopping and dual-frequency chopping modes. With the dedicated dual-frequency blade, two beams—pump and probe—can be modulated independently by two slot rings on the same wheel, with synchronous output of a frequency reference signal, making it ideal for pump–probe, differential ratio measurement, and other advanced optical experiments. It offers two control modes—free-running on the internal clock or synchronized to an external TTL signal—and is compatible with most optical test equipment, including pulsed lasers and spectrometers. It is an essential instrument for weak-signal detection and time-resolved spectroscopy in the laboratory.
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