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Optical Chopper

Optical Chopper

The SR540 chopper will handle all your optical chopping requirements—from simple measurements to dual-beam and intermodulation experiments. The SR540 has a 4-digit frequency display, front-panel frequency control, analog voltage frequency control and two reference outputs with ...
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  1. SRS SR540 Low Jitter Optical Chopper System

    SRS SR540 Low Jitter Optical Chopper System

    • 4 Hz to 3.7 kHz chopping frequencies
    • Low phase jitter
    • Single and dual beam experiments
    • Sum & difference reference outputs
    • Bolt clamp or rod mounting
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  2. SRS SR555 Current Preamplifier

    SRS SR555 Current Preamplifier

    Low noise current preamplifier for lock-ins

    • 10V/µA fixed gain
    • 120 kHz bandwidth
    • Bias voltage input
    • Powered by SRS lock-in amplifiers
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  3. SRS SR556 Current Preamplifier

    SRS SR556 Current Preamplifier

    Ultra low noise current preamplifier for lock-ins

    • 1 V/nA fixed gain
    • 5 fA/√Hz input noise
    • Bias voltage input
    • Powered by SRS lock-in amplifiers
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