Because photons are affected by gravity, their frequency changes. The converse might be true, so that frequency shifts in photons affect the 'gravity' of the vacuum.
One second is defined as
http://en.wikipedia.org/wiki/Second said:
the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.
one meter is defined as:
http://en.wikipedia.org/wiki/Metre said:
Since 1983, it has been defined as "the length of the path travelled by light in vacuum during a time interval of 1 ⁄ 299,792,458 of a second".
This is proof that wavelengths and frequencies of the electromagnetic spectrum can be used to measure distance and time. Within the EM frequency band, there are 26 orders of magnitude of frequencies, from radio waves (0.1Hz) to gamma rays (10^26Hz). One of the postulates of relativity is that all inertial frames measure the speed of light to be c, regardless of how fast they are moving with respect to one another.
It's like you science people just trip over what should be perfectly obvious: the aether medium is made out of EM waves. But you still don't see it!
But you have to show the relation is symmetric: that is, if A is affected by B, then B is affected by A.
However, photons don't interact with each other, whereas gravity exists because matter is made up of particles that do interact with each other.
Matter interacts because charges exist.
Charges exist because electric and magnetic fields exist.
Electric and magnetic fields exist because virtual photons exist.
Virtual photons exist because EM waves exist.
Plus there's the problem of reproducing the shift in frequency. Emitting photons each with a different frequency is not the same as emitting photons then shifting their frequency. It just isn't.
The only way we know how to shift the frequency of photons is with gravity, so the argument is circular: to produce a frequency shift and "produce" gravitational fields you need to pass photons through a gravitational field.
Don't over think this. Everyone knows that you can synthesize a microwave frequency using DC voltages, it's called a DAC (digital to analog) converter. If you can synthesize one frequency, then you can synthesize a frequency shift between two frequencies. It's probably smart to make the ratio between the two frequencies: $$\frac{f_2}{f_1}>2.$$
Several days ago you asked me about the intrinsic vacuum and gravity. As near as I can tell, this is what you got:
Extrinsic energy exists because aether waves exist across the EM spectrum.
Intrinsic energy exists because aether waves frequency shift across the EM frequency band.
Aether waves that frequency shift cause time dilation to exist. Time dilation causes gravity and acceleration fields to exist - proven by the Einstein Equivalence Principle.
A rational person would try it in reverse to see if frequency shift will generate an acceleration field.
Cause/effect relationships are irrelevant if you are willing to perform the experiment. It's called a hunch.