Waveguide Joint Loss
Calculate cumulative hollow-waveguide joint loss and transmission.
Description
Independent joint losses add in decibels, while transmitted power multiplies.
Independent joint losses add in decibels, while transmitted power multiplies. A uniform per-joint loss gives a simple waveguide assembly budget.1
Calculate cumulative hollow-waveguide joint loss and transmission.
When to use Waveguide Joint Loss
Use this tool to calculate cumulative hollow-waveguide joint loss and transmission.
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 Waveguide Joint Loss 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 lossPerJointDb, jointCount using the field table and calculation rules, then run the tool.
- Read totalJointLossDb, powerTransmissionFraction. 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 |
|---|---|---|---|
| lossPerJointDb | Loss per waveguide joint (dB) | number; minimum: 0 | Required |
| jointCount | Joint count | integer; minimum: 0 | Required |
Enter nonnegative per-joint dB loss and nonnegative integer count. Return aggregate loss and power fraction; zero joints give unity transmission.
lossDb=count×lossPerJoint; transmission=10^(−lossDb/10) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| totalJointLossDb | Total joint loss (dB) | number; minimum: 0 |
| powerTransmissionFraction | Power transmission fraction | number; minimum: 0; maximum: 1 |
{
"input": {
"lossPerJointDb": 1,
"jointCount": 3
},
"output": {
"totalJointLossDb": 3,
"powerTransmissionFraction": 0.5011872336272722
}
}Limitations and assumptions
Propagation, coupling and bend losses are excluded unless incorporated elsewhere.
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 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
-
Waveguide Joint Loss — tool.io
Similar or alternative tools
- Fiber Delivery Power Margin
Check fiber-delivery intensity and nonlinear phase against supplied limits.
- Ring Isolation Ratio
Calculate forward/reverse isolation in a unidirectional ring cavity.