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Distributed Feedback (DFB) Laser Bragg Grating Coupling Coefficient (κ) Calculator

Easily calculate and compute distributed feedback (dfb) laser bragg grating coupling coefficient (κ) calculator with accurate equations, live formulas, and expert guidance.

Target single-frequency laser wavelength.

Modal effective index in laser cavity.

Diffraction order (typically 1st order).

Peak-to-peak index perturbation depth.

Physical laser chip length.

Calculated Result
81.1 cm⁻¹

Coupling Coeff (κ)

Coupling Coeff (κ)

81.1 cm⁻¹

Coupling Coefficient Kappa Cm1

81.1

Normalized Coupling Product Kappa L

2.43

Bragg Grating Period Nm

238.5

Photonic Stopband Width Nm

1.91

81.1 — cm⁻¹

Calculation Breakdown

  1. Applied FormulaSizes sub-micron periodic internal Bragg gratings, calculates coupling coefficients (κ), and optimizes the normalized feedback strength (κ·L) for single-mode DFB telecom laser transmitters.\Lambda = \frac{m \lambda}{2 n_{eff}}, \quad \kappa = \frac{\pi \Delta n}{\lambda}, \quad \Delta\lambda_{stop} = \frac{\lambda_B^2 \kappa}{\pi n_{eff}}

DFB Laser Bragg Grating Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.020416181Coupling Coeff (κ)

What Is the Distributed Feedback (DFB) Laser Bragg Grating Coupling Coefficient (κ) Calculator?

This tool computes distributed feedback (dfb) laser bragg grating coupling coefficient (κ) calculator with high precision arithmetic.

How Does the Distributed Feedback (DFB) Laser Bragg Grating Coupling Coefficient (κ) Calculator Work?

Sizes sub-micron periodic internal Bragg gratings, calculates coupling coefficients (κ), and optimizes the normalized feedback strength (κ·L) for single-mode DFB telecom laser transmitters.

Distributed Feedback (DFB) Laser Bragg Grating Coupling Coefficient (κ) Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Λ=mλ2neff,κ=πΔnλ,Δλstop=λB2κπneff\Lambda = \frac{m \lambda}{2 n_{eff}}, \quad \kappa = \frac{\pi \Delta n}{\lambda}, \quad \Delta\lambda_{stop} = \frac{\lambda_B^2 \kappa}{\pi n_{eff}}

Sizes sub-micron periodic internal Bragg gratings, calculates coupling coefficients (κ), and optimizes the normalized feedback strength (κ·L) for single-mode DFB telecom laser transmitters.

How to Use the Distributed Feedback (DFB) Laser Bragg Grating Coupling Coefficient (κ) Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Distributed Feedback (DFB) Laser Bragg Grating Coupling Coefficient (κ) Calculator Example

Input Values:

emissionWavelengthNm:1550
effectiveIndexNeff:3.25
gratingOrderM:1
indexModulationDeltaN:0.008
laserCavityLengthUm:300
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required cm⁻¹.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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