How to use the laser photon output calculator
Find how many photons per second a laser of a given power and wavelength emits. Enter laser power, wavelength in the fields above; the photons emitted per second, photon flux in millions per second are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “photons per second”, “laser photon count”, “photon flux”, “calculate laser photon output”, “find photons emitted per second”.
Formula
Variables
- P — Laser power (mW)
- lam — Wavelength (nm)
Worked example
With laser power = 1 mW, wavelength = 650 nm, the calculator gives photons emitted per second ≈ 3.2722 × 10¹⁵ photons/s; photon flux in millions per second ≈ 3.2722 × 10⁹ 10⁶/s.
Frequently asked questions
What is the laser photon output calculator used for?
Find how many photons per second a laser of a given power and wavelength emits. It helps with questions such as “photons per second”, “laser photon count”, “photon flux”.
What is the formula for the laser photon output calculation?
Photons emitted per second (photons/s) = P / 1000 × lam × 1e-9 / (HPLANCK × CLIGHT). Photon flux in millions per second (10⁶/s) = [Photons emitted per second] / 1e6. Here P is laser power (mW), lam is wavelength (nm).
What inputs do I need for the laser photon output calculator?
You need laser power in mW, wavelength in nm. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the laser photon output calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the laser photon output result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.