Photonics Calculators

Resources

Essential tools for optical engineers, researchers, and students.
Streamline your design process with our comprehensive suite of photonics calculators. Whether you are designing laser systems, analyzing fiber optic parameters, or performing unit conversions, these tools provide instant, precise computations to support your lab work and research.
Laser Physics Fiber Optics Spectroscopy Telecom
Laser Systems & Beams

Laser Spot Size

Calculate focused spot size based on beam diameter and lens.

Laser Beam Expander

Calculate magnification and divergence reduction.

Coherence Length

Determine temporal coherence from spectral linewidth.

Laser Peak Power

Determine peak power from pulse width and average power.

Pulse Energy Calculator

Calculate Joules per pulse from average power and rep rate.

Laser Power Density (Fluence)

Calculate W/cm² or J/cm² for material processing.

Gaussian Beam Divergence

Find the far-field expansion angle of a laser beam.

Free Spectral Range (FSR)

Determine frequency spacing for cavities and etalons.

Laser Heat Transfer

Estimate thermal effects from laser-material interaction.
Geometric Optics

Snell's Law Calculator

Calculate refraction angles and critical angles.

Thin Lens Equation

Solve for image distance, focal length, and magnification.

Lens Thickness

Calculate center and edge thickness for lenses.

Critical Angle (TIR)

Find the angle for Total Internal Reflection.

Diffraction Grating

Calculate diffraction angles for various groove densities.

Fresnel Reflection

Reflectivity losses at air-glass interfaces.

Brewster's Angle

Find the perfect polarization transmission angle.
Fiber Optics & Imaging

Mode Field Diameter (MFD)

Compute beam width inside single-mode optical fibers.

Numerical Aperture (NA)

Calculate NA from core/clad refractive indices.

F-Number (f/#) to NA

Convert between camera Lens f-stop and Numerical Aperture.

V Number Calculator

Determine Single-mode or Multi-mode fiber operation.

Fiber Splice Loss

Estimate insertion loss at fiber splices or connectors.
Converters & Calculators

OD to Transmission

Convert between Optical Density (OD) and Transmission %.

Frequency ↔ Wavelength

Convert between Hz and nm easily.

Photon Energy Calculator

Energy in eV/Joules from wavelength or frequency.

dBm to Watts Calculator

Signal strength conversion (dBm to W).

Decibel-Percentage

Convert decibel loss/gain to percentage values.

Angstrom to Nanometer

Unit conversion for atomic scale lengths.

Wavelength to Wavenumber

Convert vacuum wavelength (nm) to cm⁻¹.

Wavenumber to Wavelength

Convert wavenumber (cm⁻¹) back to nanometers.

dBm to Voltage

Convert RF/optical power in dBm to RMS voltage.