Encyclopedia … combined with a great Buyer's Guide!

Sponsoring this encyclopedia:     and others

Master Laser

Definition: a single-frequency laser used for injection locking one or several other lasers

Alternative term: seed laser

Category: lasers

How to cite the article; suggest additional literature


A master laser is a single-frequency laser which is used for, e.g., injection locking of one or several slave lasers. Sometimes, the term master laser is also used for a seed laser of a master oscillator power amplifier system.

A master laser often generates an optical power which is well below the output power of the complete laser system; the injection-seeded slave lasers may then be high-power lasers. The modest power requirements for the master laser make it possible to realize a very low level of laser noise, which may be more or less transferred to the whole system. Also, a larger range for wavelength tuning may be accomplished.

See also: injection locking, master oscillator power amplifier, seed lasers
and other articles in the category lasers


If you like this article, share it with your friends and colleagues, e.g. via social media: