SNR for a given D*, Power
Calculate the compatibility of a sensor with a preamplifier to ensure the output voltage limits and bandwidths are compatible.
Input Power (W)
Input Wavelength (μm)
Measurement Bandwidth (Hz)
Diameter (mm)
Area (cm2)
D*(Jones)
NEP(W/√Hz)
Response Peak(μm)
Relative Response at Wavelength
SNR
D* is a sensor figure of merit that incorporates the detector size, responsivity, noise, and noise-equivalent power, to provide a way of comparing different detector materials or sizes.
This model uses the Linear Responsivity Relationship to correct for off-peak response. This is valid for wavelengths below the peak to within 10% percent.
This simplified model is valid for a monochromatic signal, such as from a laser.
To use this calculator
- Gather system inputs and enter into fields.
- Gather sensor specifications and enter into fields.
System Inputs Needed
- Input power
- Input wavelength
- Measurement bandwidth
From sensor specifications
- Diameter
- D*
- Peak response wavelength
Power for a given D*, SNR
Calculate the allowed input power of a sensor to ensure compatibility with a preamplifier to ensure the output voltage limits are compatible.
Desired SNR
Input Wavelength (μm)
Measurement Bandwidth (Hz)
Diameter (mm)
Area (cm2)
D* (Jones)
NEP(W/√Hz)
Response Peak (μm)
Relative Response at Wavelength
Power (W)
D* is a sensor figure of merit that incorporates the detector size, responsivity, noise, and noise-equivalent power, to provide a way of comparing different detector materials or sizes.
This model uses the Linear Responsivity Relationship to correct for off-peak response. This is valid for wavelengths below the peak to within 10% percent.
This simplified model is valid for a monochromatic signal, such as from a laser.
To use this calculator
- Gather system inputs and enter into fields.
- Gather sensor specifications and enter into fields.
System Inputs Needed
- Desired SNR
- Input wavelength
- Measurement bandwidth
From sensor specifications
- Diameter
- D*
- Peak response wavelength