Abstract
A model incorporating noise and pump depletion in a Brillouin amplifier (BA) predicts a fundamental limitation on attainable pump-to-signal-ratio extraction efficiency. Experimental data supporting this model are also presented. In spite of the limitation, an experimental technique is shown that results in a factor-of-7 increase in extraction efficiency. We accomplish this by noise suppressing and subsequently double passing a BA. We report an overall power efficiency of 37% and phase-conjugate amplification of 3.75 × 1010 for a signal input power near the noise level. This performance, which is the best to our knowledge recorded to date, is accomplished without requiring additional input energy.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have