Bad cavities and masers

by Niles
Tags: cavities, masers
Niles is offline
Nov16-12, 02:56 PM
P: 1,863

Often when I read papers about state-of-the-art lasers (in terms of linewidth and stability), many mention (e.g. here, figure 1: that the Hydrogen-maser works in the bad-cavity limit. I don't know why that is and I can't seem to find any good litterature explaining this.

Can anyone recommend a book that explains this matter in some detail?

Phys.Org News Partner Physics news on
Researchers find tin selenide shows promise for efficiently converting waste heat into electrical energy
After 13 years, progress in pitch-drop experiment (w/ video)
Global scientific team 'visualizes' a new crystallization process (w/ video)
Cthugha is offline
Nov17-12, 06:36 AM
Sci Advisor
P: 1,563
Being in the bad-cavity limit means two things: First, the cavity lifetime is rather short, which means that the cavity quality factor is not too high. Second, the cavity lifetime is much shorter than the typical light-matter interaction timescale and also shorter than the decay timescale of your active medium. That means you are also far away from the strong coupling limit.

This should be explained in the Mandel/Wolf book on quantum optics, I think, but it is a hard read. Kavokin's book on microcavities also explains those things, but is obviously not focused on lasers in general. Maybe Haken's book also explains this.
f95toli is online now
Nov17-12, 06:52 AM
Sci Advisor
PF Gold
f95toli's Avatar
P: 2,197
Most of the good maser books were written >30 years ago and are out of print (I have access to some of them because I have a collegue who works with masers ands he has been collecting materials for years).
However, there are a few review articles out there that migth be helpful. Keep an eye out for articles on frequency references (the main application of hydrogen masers). Unfortunately I can't think of a good reference now, but I can have a look when I get into the office on Monday.

Niles is offline
Nov17-12, 12:54 PM
P: 1,863

Bad cavities and masers

Thanks for the suggestions, it is kind of you both to respons.


Register to reply

Related Discussions
Methanol Masers General Astronomy 2
An Introduction to Lasers and Masers Other Science Learning Materials 0
Debunk me, please! #2 (lasers/masers) General Physics 8
age and cavities Biology 5