Laser threshold

The laser threshold or pumping threshold describes the minimum required pump power of a laser , at which gain through energy supply and loss through absorption in the laser medium and through the coupling out of the generated emission are balanced out. This intensity threshold indicates the point above which the laser begins to work.

In the case of laser diodes , it is customary not to specify a power, but rather a current strength , since these lasers are pumped with direct current , and this variable is easier to measure and determine. In this case the name threshold amperage is also used.

Further information

Laser threshold in the Encyclopedia of Laser Physics and Technology (Engl.)
Threshold pump power in the Encyclopedia of Laser Physics and Technology (Engl.)

Individual evidence

^ Hans Joachim Eichler, Jürgen Eichler: Laser . Designs, beam guidance, applications. 8th edition. Springer Vieweg, 2015, ISBN 978-3-642-41438-1 , chap. 2, p. 46f , doi : 10.1007 / 978-3-642-41438-1 ( springer.com [PDF]).

[1] Hans Joachim Eichler, Jürgen Eichler: Laser . Designs, beam guidance, applications. 8th edition. Springer Vieweg, 2015, ISBN 978-3-642-41438-1 , chap. 2, p. 46f , doi : 10.1007 / 978-3-642-41438-1 ( springer.com [PDF]).