Raman Soliton Shift
Estimate a Raman soliton self-frequency wavelength shift from a supplied scaling coefficient.
Description
A Raman wavelength-shift estimate uses a caller-supplied linear coefficient times peak power and fiber length.
A Raman wavelength-shift estimate uses a caller-supplied linear coefficient times peak power and fiber length. It is an empirical scaling rule.1
Estimate a Raman soliton self-frequency wavelength shift from a supplied scaling coefficient.
When to use Raman Soliton Shift
Use this tool to estimate a Raman soliton self-frequency wavelength shift from a supplied scaling coefficient.
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 Raman Soliton Shift 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 ramanShiftCoefficientNmPerWKm, pulsePeakPowerWatts, fiberLengthKilometers, initialWavelengthNanometers using the field table and calculation rules, then run the tool.
- Read wavelengthShiftNanometers, finalWavelengthNanometers. 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 |
|---|---|---|---|
| ramanShiftCoefficientNmPerWKm | Raman shift coefficient (nm/(W·km)) | number | Required |
| pulsePeakPowerWatts | Pulse peak power (W) | number; minimum: 0 | Required |
| fiberLengthKilometers | Fiber length (km) | number; minimum: 0 | Required |
| initialWavelengthNanometers | Initial wavelength (nm) | number; minimum: 0 | Required |
Enter finite signed coefficient and nonnegative power, length and initial wavelength. Return signed shift and final wavelength.
shift=coefficient×peakPower×lengthKm; finalλ=initialλ+shift Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| wavelengthShiftNanometers | Estimated wavelength shift (nm) | number; minimum: 0 |
| finalWavelengthNanometers | Estimated final wavelength (nm) | number; minimum: 0 |
{
"input": {
"ramanShiftCoefficientNmPerWKm": 0.01,
"pulsePeakPowerWatts": 100,
"fiberLengthKilometers": 2,
"initialWavelengthNanometers": 1550
},
"output": {
"wavelengthShiftNanometers": 2,
"finalWavelengthNanometers": 1552
}
}Limitations and assumptions
No nonlinear propagation, pulse evolution or physical final-wavelength constraint is solved.
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 Nonlinear Length: Calculate nonlinear length and accumulated self-phase modulation. For a complementary task, use Supercontinuum Octave Span: Measure supercontinuum spectral span in frequency octaves.
References
-
Raman Soliton Shift — tool.io
Similar or alternative tools
- Nonlinear Length
Calculate nonlinear length and accumulated self-phase modulation.
- Supercontinuum Octave Span
Measure supercontinuum spectral span in frequency octaves.