Subject: Is there a method for the creation of super low frequancy lasers?

I am inventing something, but in order for it to work, I need to know a method
of emitting low frequancy (in the range of a 100hz) coherent and low/non
converging radiation such as a laser does. The problem is that lasers emit very
high frequancy em radiation (compared to the 100hz that I need). I have done
some research and have found how lasers work and have found that there are
things called masers which emit non/low-diverging coherent microwaves. But i
need a much lower frequancy than microwaves.
I had a few ideas, which i asked questions on. Such as:
     -Finding a material that has a difference of energy between one of its
orbitals in the range of a radio wave photon and make it lase.
     -Using a parabolic reflector reflect radio waves emitted from an emitter at
its focus in parallel rays. To solve the problem of reflecting such a large
wavelength radiation, i proposed to have the whole set up be in a super high
index of refraction material.
(http://www.madsci.org/posts/archives/2006-05/1149005243.Ph.q.html)
     -Slowing down the electrons in a free electron laser so that they'll emit
lower frequancies. I've read that free electron lasers can emit microwaves as
the lowest frequancy, but i don't see why they wouldn't emit a lower frequancy
of the speed of the electrons is reduced.

Re: Is there a method for the creation of super low frequancy lasers?