APD Mode Comparison
Compare caller-supplied Geiger- and linear-mode APD detection efficiencies.
Description
APD mode comparison summarizes supplied detection efficiencies.
APD mode comparison summarizes supplied detection efficiencies. Percentage-point difference and relative ratio answer different comparison questions.1
Compare caller-supplied Geiger- and linear-mode APD detection efficiencies.
When to use APD Mode Comparison
Use this tool to compare caller-supplied Geiger- and linear-mode APD detection efficiencies.
Prepare the optical measurements, geometry, fitted coefficients or caller-selected thresholds requested. Confirm wavelength, radius/diameter, pulse-width, angle and unit conventions before running the calculation.
How to use APD Mode Comparison and understand its results
- Prepare the optical measurements, geometry, fitted coefficients or caller-selected thresholds requested. Confirm wavelength, radius/diameter, pulse-width, angle and unit conventions before running the calculation.
- Enter geigerDetectionEfficiencyPercent, linearDetectionEfficiencyPercent using the field table and calculation rules, then run the tool.
- Read efficiencyRatio, efficiencyDifferencePoints, higherEfficiencyMode. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| geigerDetectionEfficiencyPercent | Geiger-mode detection efficiency (%) | number; minimum: 0; maximum: 100 | Required |
| linearDetectionEfficiencyPercent | Linear-mode detection efficiency (%) | number; minimum: 0; maximum: 100 | Required |
Enter efficiencies 0–100%. Return ratio, signed difference and higher mode or tie. A zero linear efficiency returns ratio zero as a placeholder.
differencePoints=Geiger−linear; ratio=Geiger/linear Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| efficiencyRatio | Geiger-to-linear efficiency ratio | number; minimum: 0 |
| efficiencyDifferencePoints | Efficiency difference (percentage points) | number |
| higherEfficiencyMode | Higher-efficiency mode | string; one of "geiger", "linear", "tie" |
{
"input": {
"geigerDetectionEfficiencyPercent": 60,
"linearDetectionEfficiencyPercent": 20
},
"output": {
"efficiencyRatio": 3,
"efficiencyDifferencePoints": 40,
"higherEfficiencyMode": "geiger"
}
}Limitations and assumptions
The placeholder is not a finite relative advantage. No dark counts, saturation, timing or detector choice is modeled.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use BB84 Sift Error Analysis: Sift aligned BB84 records and calculate the sifted-key error rate. For a complementary task, use Beam-Tap Ratio: Calculate calibrated beam-monitor tap ratio and measured sample share.
References
-
APD Mode Comparison — tool.io
Similar or alternative tools
- BB84 Sift Error Analysis
Sift aligned BB84 records and calculate the sifted-key error rate.
- Beam-Tap Ratio
Calculate calibrated beam-monitor tap ratio and measured sample share.