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Ultra-low-noise photoreamplifier
Spectral range
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atto-i-4
800 nm – 1650 nm |
For the atto-series photomultipliers, the lowest-noise TE-cooled photodiodes available are carefully selected and used. A built-in TE controller stabilizes the detector temperature to within a few millikelvin, which ensures consistent spectral sensitivity, especially near the detector’s cutoff region. Detector signal amplification is achieved through a tailored current-to-voltage converter, whose intrinsic noise is low compared to that of the detector. This allows light powers even in the atto-watt range to be converted into proportional output voltages, which can be conveniently processed further using an oscilloscope, voltmeter, or A/D converter card. The power supply is provided via a small included plug-in unit. The technical data for each device are individually measured and documented.
Characteristics
- Spectral range: 800 nm – 1650 nm
- Gain: 10¹² V/W
- Output signal: 0 to +10 V
- Noise: ultra-low; NEP up to 400 aW/√Hz (400 × 10⁻¹⁸ W/√Hz)
- Ready to use immediately
Applications
- Near-field microscopy (SNOM)
- Fluorescence measurement
- Spectroscopy
- Biophotonics
- Excited quantum dots
- Alternative to LN₂ Dewar detectors