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Optical Chopper System and Chopper Wheels | Thorlabs
The MC2000B Optical Chopper is a precision instrument that utilizes advanced features to modulate light from a continuous beam. The controller uses a phase-locked loop (PLL) motor speed control design to precisely maintain the chopping speed and phase relative to a reference signal. An internal, crystal-stabilized, frequency synthesizer provides an accurate and stable reference frequency for stable long-term performance. The MC2000B Chopper offers faster locking times, interface improvements, and a larger selection of blades than our previous-generation MC2000 Optical Chopper.
Description
Features and Benefits:
Crystal-Stabilized, Phase-Locked Feedback Loop Suppresses Low Frequency Drift and Phase Jitter
Harmonic, Subharmonic, and Fractional Harmonic Chopping with Sum and Difference Reference Outputs
Microprocessor Controlled
Single- and Dual-Frequency Blades Available
Harmonic Frequency Blades Available for Pump-Probe and Other Nonlinear Experiments
Save and Recall User Setups in Non-Volatile RAM
USB Interface
Control Software Package Included
Technical Specifications:
Chopping Frequency, with Various Blades: 4 Hz – 10 kHz
Frequency Drift: <20 ppm/°C
Ext. Reference Compatibility: TTL/CMOS
Frequency Resolution: 0.01 Hz (2 Slot Blades), 0.1 Hz (MC1F10HP, Default Blade) 1 Hz (All Other Blades)
External Reference Signal Synchronization
Harmonic: 2 to 15X
Subharmonic: 1/2 to 1/15X.
Additional information
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