Optical resonators and Gaussian beams

Lesson
Case study
Lesson questions
- Laser beam transformation
- Laser beam characteristics
- Stability
- Energy
- Spectral distribution of the longitudinal modes

Laser beam transformation

We want to use a thin lens in order to focus a collimated beam (radius 1 mm, from an He-Ne laser, wavelength = 633 nm) so that the Rayleigh length is 30 mm.

Question

What focal length should have the lens ?

AccueilOutils transversesNouvelle pageInformations sur le cours (ouvrir dans une nouvelle fenêtre)Lesson questionsLaser beam characteristics