Plasma-Mirror Contrast
Calculate plasma-mirror pulse-contrast improvement from differential reflectivity.
Description
A plasma-mirror contrast estimate scales pulse energies by different reflectivities.
A plasma-mirror contrast estimate scales pulse energies by different reflectivities. Improvement compares reflected and initial energy ratios.1
Calculate plasma-mirror pulse-contrast improvement from differential reflectivity.
When to use Plasma-Mirror Contrast
Use this tool to calculate plasma-mirror pulse-contrast improvement from differential reflectivity.
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 Plasma-Mirror Contrast 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 initialMainPulseEnergy, initialPrepulseEnergy, mainPulseReflectivity, prepulseReflectivity using the field table and calculation rules, then run the tool.
- Read initialContrast, reflectedContrast, contrastImprovement. 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 |
|---|---|---|---|
| initialMainPulseEnergy | Initial main-pulse energy | number; minimum: 0 | Required |
| initialPrepulseEnergy | Initial prepulse energy | number; minimum: 0 | Required |
| mainPulseReflectivity | Main-pulse reflectivity | number; minimum: 0; maximum: 1 | Required |
| prepulseReflectivity | Prepulse reflectivity | number; minimum: 0; maximum: 1 | Required |
Enter nonnegative energies and reflectivities from zero to one, with positive prepulse energy/reflectivity. Use positive main energy for finite improvement.
initial=main/pre; reflected=main×Rmain/(pre×Rpre); improvement=reflected/initial Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| initialContrast | Initial main-to-prepulse contrast | number; minimum: 0 |
| reflectedContrast | Reflected main-to-prepulse contrast | number; minimum: 0 |
| contrastImprovement | Contrast improvement factor | number; minimum: 0 |
{
"input": {
"initialMainPulseEnergy": 100,
"initialPrepulseEnergy": 1,
"mainPulseReflectivity": 0.5,
"prepulseReflectivity": 0.01
},
"output": {
"initialContrast": 100,
"reflectedContrast": 5000,
"contrastImprovement": 50
}
}Limitations and assumptions
Zero main energy leads to 0/0 and fails the output contract. No intensity-dependent plasma formation or temporal-contrast trace 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 Kerr-Gate Suppression: Measure Kerr-gate background suppression, desired-signal transmission, and SNR improvement. For a complementary task, use Q-Switch Peak Power: Calculate triangular-pulse peak power and pulse-train average power.
References
-
Plasma-Mirror Contrast — tool.io
Similar or alternative tools
- Kerr-Gate Suppression
Measure Kerr-gate background suppression, desired-signal transmission, and SNR improvement.
- Q-Switch Peak Power
Calculate triangular-pulse peak power and pulse-train average power.