SCOWA Amplifier Output

Estimate SCOWA output from small-signal gain and a supplied saturation ceiling.

Description

Small-signal amplifier gain converts dB to a power multiplier.

Small-signal amplifier gain converts dB to a power multiplier. A supplied saturation output provides a hard ceiling in this estimate.1

Estimate SCOWA output from small-signal gain and a supplied saturation ceiling.

When to use SCOWA Amplifier Output

Use this tool to estimate SCOWA output from small-signal gain and a supplied saturation ceiling.

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 SCOWA Amplifier Output and understand its results

  1. 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.
  2. Enter inputPowerWatts, smallSignalGainDb, saturationOutputWatts using the field table and calculation rules, then run the tool.
  3. Read unsaturatedOutputWatts, estimatedOutputWatts, saturationLimited. The explanation below defines the units, signs, ordering and any flags or placeholder values.
  4. 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 fieldMeaningValue type; see rules belowRequirement
inputPowerWattsInput optical power (W)number; minimum: 0Required
smallSignalGainDbSmall-signal gain (dB)numberRequired
saturationOutputWattsSaturation output (W)number; minimum: 0Required

Enter nonnegative input/ceiling and finite signed gain. Return both outputs and strict unsaturated>ceiling flag.

unsaturated=input×10^(gainDb/10); output=min(unsaturated,ceiling)

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output fieldMeaningValue type
unsaturatedOutputWattsUnsaturated output (W)number; minimum: 0
estimatedOutputWattsEstimated output (W)number; minimum: 0
saturationLimitedSaturation limitedboolean
json
{
  "input": {
    "inputPowerWatts": 1,
    "smallSignalGainDb": 20,
    "saturationOutputWatts": 50
  },
  "output": {
    "unsaturatedOutputWatts": 100,
    "estimatedOutputWatts": 50,
    "saturationLimited": true
  }
}

Limitations and assumptions

The hard cap is not a continuous saturation model. Noise, spectral gain and dynamics are excluded.

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 Fiber Delivery Power Margin: Check fiber-delivery intensity and nonlinear phase against supplied limits. For a complementary task, use Ring Isolation Ratio: Calculate forward/reverse isolation in a unidirectional ring cavity.

References

  1. SCOWA Amplifier Output — tool.io

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