Mode-Hop Tuning Ratio
Calculate the current-to-grating tuning ratio needed for matched frequency change.
Description
Matched tuning compares grating voltage sensitivity with current sensitivity.
Matched tuning compares grating voltage sensitivity with current sensitivity. Their quotient gives current change per grating-voltage change.1
Calculate the current-to-grating tuning ratio needed for matched frequency change.
When to use Mode-Hop Tuning Ratio
Use this tool to calculate the current-to-grating tuning ratio needed for matched frequency change.
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 Mode-Hop Tuning Ratio 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 gratingTuningGhzPerVolt, currentTuningGhzPerMilliamp using the field table and calculation rules, then run the tool.
- Read currentPerVoltMilliamp. 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 |
|---|---|---|---|
| gratingTuningGhzPerVolt | Grating tuning sensitivity (GHz/V) | number | Required |
| currentTuningGhzPerMilliamp | Current tuning sensitivity (GHz/mA) | number | Required |
Enter finite signed sensitivities with nonzero current sensitivity. Return signed mA/V ratio.
mA/V=(GHz/V)/(GHz/mA) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| currentPerVoltMilliamp | Matched current change per volt (mA/V) | number |
{
"input": {
"gratingTuningGhzPerVolt": 10,
"currentTuningGhzPerMilliamp": 2
},
"output": {
"currentPerVoltMilliamp": 5
}
}Limitations and assumptions
No actuator motion, mode-hop boundary, hysteresis or closed-loop control 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.
Alternative or Complementary methods
Use Wavelength-Lock Selector: Select an absorption-cell, etalon, or hybrid wavelength lock from supplied requirements. For a complementary task, use DBR Tuning Span: Combine measured tuning contributions from DBR laser sections.
References
-
Mode-Hop Tuning Ratio — tool.io
Similar or alternative tools
- Wavelength-Lock Selector
Select an absorption-cell, etalon, or hybrid wavelength lock from supplied requirements.
- DBR Tuning Span
Combine measured tuning contributions from DBR laser sections.