Two Photon Absorption Calculator

Use our free two-photon absorption calculator tool to quickly get the number of two-photon excitations per molecule for a given laser source. For using this calculator, simply give the inputs in the input fields and click on the calculate button. So that you will get an answer instantly.

Two-Photon Absorption Calculator: To determine the number of molecules for a given laser source use this calculator tool, so that you will get the answers instantly and accurately. And also provide you with complete information like definition, formula, steps, and some solved examples. Learn the concept if you do not know the concept too. Read on to know more!!

What is Two Photon Absorption?

Two-photon absorption is a process where an atom or molecule absorbs two photons simultaneously. The energy of two photons can be identical or different. This absorption results in the excitation of the atom or molecule from one energy state to a higher energy state.

Look into the formula for two-photon absorption is,



  • ϕ – Photon flux at the center of a Gaussian beam.
  • τ– Exposure time.
  • δ – Two-photon absorption

How to Calculate Two-Photon Absorption?

Here are the steps to calculate the two-photon absorption that are given below.

  • Firstly, note down all the values that were given in the problem.
  • Next, apply the formula, N=21*δ*ϕ2*τ.
  • After that, substitute the values and simplify them.
  • Finally, you will get the value of two-photon absorption.

FAQs on Two Photon Absorption Calculator

1. What is two-photon absorption mean?

Photon absorption is a process in which an atomic electron absorbs the energy of an incident photon.

2. How to use this two-photon absorption calculator?

All you need to do is give the inputs in the input fields and click on the calculate button that gives you instant answers.

3. What are the applications of two-photon absorption?

Here are the two applications that are given below.

  • The study of materials and investigate the relationship between their electronic and molecular structure and optical properties.

  • Performing high-resolution imaging of live cell and tissue samples.