Mamyshev Filter Separation
Calculate Mamyshev filter separation and passband overlap.
Description
Mamyshev filter separation compares center spacing with the sum of half-widths.
Mamyshev filter separation compares center spacing with the sum of half-widths. Touching passbands count as overlap in this tool.1
Calculate Mamyshev filter separation and passband overlap.
When to use Mamyshev Filter Separation
Use this tool to calculate Mamyshev filter separation and passband overlap.
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 Mamyshev Filter Separation 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 firstFilterCenterNanometers, secondFilterCenterNanometers, firstFilterWidthNanometers, secondFilterWidthNanometers using the field table and calculation rules, then run the tool.
- Read centerSeparationNanometers, passbandGapNanometers, passbandsOverlap. 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 |
|---|---|---|---|
| firstFilterCenterNanometers | First filter center (nm) | number | Required |
| secondFilterCenterNanometers | Second filter center (nm) | number | Required |
| firstFilterWidthNanometers | First filter width (nm) | number; minimum: 0 | Required |
| secondFilterWidthNanometers | Second filter width (nm) | number; minimum: 0 | Required |
Enter finite signed centers and nonnegative widths in nm. Return separation, signed gap and gap≤0 flag.
gap=|center2−center1|−(width1+width2)/2 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| centerSeparationNanometers | Center separation (nm) | number; minimum: 0 |
| passbandGapNanometers | Passband gap (nm) | number |
| passbandsOverlap | Passbands overlap | boolean |
{
"input": {
"firstFilterCenterNanometers": 1030,
"secondFilterCenterNanometers": 1050,
"firstFilterWidthNanometers": 10,
"secondFilterWidthNanometers": 10
},
"output": {
"centerSeparationNanometers": 20,
"passbandGapNanometers": 10,
"passbandsOverlap": false
}
}Limitations and assumptions
No spectral transmission shape, nonlinear broadening or oscillator dynamics is calculated.
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. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use NOPA Bandwidth Overlap: Calculate spectral overlap between a NOPA seed and gain window. For a complementary task, use Nonlinear Length: Calculate nonlinear length and accumulated self-phase modulation.
References
-
Mamyshev Filter Separation — tool.io
Similar or alternative tools
- NOPA Bandwidth Overlap
Calculate spectral overlap between a NOPA seed and gain window.
- Nonlinear Length
Calculate nonlinear length and accumulated self-phase modulation.