We present a noiseless optical amplifier comprising a signal-amplifying feed-forward loop and a power-amplifying injection-locked laser. We demonstrate that the signal amplifier can attain a signal-transfer coefficient limited solely by the quantum efficiency of our in-loop photodetector and that we can independently amplify the optical power while leaving the normalized intensity-noise spectral density of the input field unchanged.
© 1998 Optical Society ofAmerica
E. H. Huntington, P. K. Lam, T. C. Ralph, D. E. McClelland, and H.-A. Bachor, "Noiseless independent signal and power amplification," Opt. Lett. 23, 540-542 (1998)