Photonics Calculators
Resources
Laser Pulse Energy
Calculate Joules per pulse from average power and rep rate.
Laser Peak Power
Determine peak power based on pulse energy and width.
Duty Cycle Calculator
Calculate the ratio of active time to total period for pulsed lasers.
Power Density (Fluence)
Determine W/cm² or J/cm² at the laser focus.
Laser Spot Size
Calculate focused spot diameter for Gaussian beams.
Beam Expander
Analyze magnification and output divergence changes.
Beam Divergence
Calculate the far-field expansion angle (half or full angle).
Rayleigh Range
Find the distance where beam area doubles from the waist.
Wall-Plug Efficiency
Calculate the optical output vs. total electrical input power.
Laser Safety (NOHD)
Nominal Ocular Hazard Distance for eye safety zones.
Laser Heat Transfer
Estimate material temperature rise during laser exposure.
Diode Temp Tuning
Determine temperature setpoints for precise diode wavelength control.
Laser Diode Lifetime
Estimate reliability and MTBF using the Arrhenius model.
Coherence Length
Determine temporal coherence length from spectral linewidth.
Snell's Law
Calculate angles of refraction and indices of refraction.
Fresnel Reflection
Calculate percentage reflection at material interfaces.
Critical Angle (TIR)
Find the angle required for total internal reflection.
Brewster's Angle
Determine zero-reflection polarization angle.
Diffraction Grating
Find angular separation for spectral lines.
Numerical Aperture
Calculate NA and Acceptance Angle for fibers and lenses.
F-Number to NA
Convert between Lens f-stop and Numerical Aperture.
Spectral Range (FSR)
Free Spectral Range for etalons and laser cavities.
OD to Transmission
Convert Optical Density values to percentage units.
Thin Lens Equation
Find focal length, object, or image distances.
Lens Thickness
Determine center vs. edge thickness for spherical lenses.
Sag Calculator
Calculate the sagitta depth of optical surfaces.
Mode Field Diameter
Calculate MFD for single-mode fiber optimization.
Fiber V-Number
Check the cutoff for single-mode vs multi-mode fiber.
Fiber Splice Loss
Estimate loss from MFD mismatch and lateral offset.
Fiber Delay Line
Calculate optical latency and delay in fiber optic paths.
Responsivity & QE
Calculate Photodiode Responsivity and Quantum Efficiency.
Q-Factor Calculator
Determine quality factor and cavity linewidth.
Ohm's Law
Calculate V, I, R, and Power in electrical circuits.
RLC Circuit Calculator
Find resonance and impedance for AC RLC circuits.
Ohms to Volt-Ampere
Calculate apparent power (VA) from resistance.
Driver Compliance Voltage
Required voltage overhead for operating laser diodes.
NTC Thermistor
Temperature sensing resistance conversions.
TEC Thermal Load
Heat pumping requirements for Peltier coolers.
dBm ↔ Watts
Standard RF and optical power unit converter.
dBm ↔ Voltage
Power to Vrms based on system impedance.
Frequency ↔ Wavelength
The essential Hz to nm/m converter.
Photon Energy
Energy in eV and Joules for any wavelength.
Decibel-Percentage
Convert transmission losses/gains to percentages.
Candela ↔ Lumens
Convert between intensity and total flux.
Wavelength to Wavenumber
Convert vacuum wavelength (nm) to cm⁻¹.
Wavenumber to Wavelength
Convert wavenumber (cm⁻¹) back to nanometers.
Angstrom ↔ Nanometer
Universal atomic-scale length unit converter.