Semiconductor Laser Relative Intensity Noise Calculator
Actual intensity-noise PSDnormalized by mean optical power squared. One-/two-sided PSDand shot/electronic-background conventions independently verified; not fractional power noise integrated over bandwidth.
Description
Relative intensity noise normalizes intensity-noise power spectral density by squared mean optical power.
Relative intensity noise normalizes intensity-noise power spectral density by squared mean optical power.1
Its linear inverse-hertz value and decibel-per-hertz representation are two forms of the same declared measurement.
When to use Semiconductor Laser Relative Intensity Noise Calculator
Use this tool to obtain observedRinPerHz, observedRinDbPerHz from the supplied records using the stated calculation. Establish the device or material, operating point, units and independently applicable measurement or model calibration.
How to use Semiconductor Laser Relative Intensity Noise Calculator and understand its results
- Establish the device or material, operating point, units and independently applicable measurement or model calibration.
- Enter actualIntensityNoisePsdWattsSquaredPerHz, matchedMeanOpticalPowerWatts, using the field meanings and rules below, then run the tool.
- Read result.observedRinPerHz, result.observedRinDbPerHz. Use the units and sign conventions below, and review any unknown records separately.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualIntensityNoisePsdWattsSquaredPerHz | Actual intensity noise psd watts squared per hz | number | Required |
| matchedMeanOpticalPowerWatts | Matched mean optical power watts | number | Required |
Require positive intensity-noise PSD in W²/Hz and positive mean optical power in watts. Divide PSD by squared mean power, require a positive representable ratio, and convert to ten log10(ratio). No frequency coordinate, bandwidth integration or amplitude-noise convention is inferred.
RIN_perHz=PSD_W2_perHz/meanPowerWatts²; RIN_dB_perHz=10×log10(RIN_perHz) Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Qualified observed calculation or explicit reference | object |
| result.observedRinPerHz | Intensity-noise PSD divided by squared mean optical power, in inverse hertz. | number |
| result.observedRinDbPerHz | Ten log10 of the linear inverse-hertz RIN value. | number |
{
"input": {
"actualIntensityNoisePsdWattsSquaredPerHz": 2,
"matchedMeanOpticalPowerWatts": 4
},
"output": {
"result": {
"observedRinPerHz": 0.125,
"observedRinDbPerHz": -9.030899869919436
}
}
}Limitations and assumptions
Device structure, material state, operating conditions and calibration determine applicability. The result does not infer missing physical parameters, verify a transport mechanism or validate a fabricated device model.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Semiconductor Laser Linewidth Schawlow Townes Calculator: A Schawlow–Townes linewidth reference depends on the laser model and correction conventions. For a complementary comparison, use Semiconductor Laser Frequency Chirp Calculator: Frequency chirp describes a time-varying frequency relative to an adopted reference.
References
Similar or alternative tools
- Semiconductor Laser Linewidth Schawlow Townes Calculator
A Schawlow–Townes linewidth reference depends on the laser model and correction conventions.
- Semiconductor Laser Frequency Chirp Calculator
Frequency chirp describes a time-varying frequency relative to an adopted reference.