We present measurements of the power noise that is due to optical amplification in a laser-diode-pumped Nd:YAG free-space traveling-wave linear amplifier in a master-oscillator–power-amplifier configuration. The quantum noise behavior of the optical amplifier was demonstrated by use of InGaAs photodetectors in a balanced detection configuration, at a total photocurrent of 100 mA and in a frequency band from 6.25 to 15.625 MHz. The experimental results are in good agreement with predictions.
© 1998 Optical Society of America America
(140.3280) Lasers and laser optics : Laser amplifiers
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.4480) Lasers and laser optics : Optical amplifiers
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(270.5290) Quantum optics : Photon statistics
W. M. Tulloch, T. S. Rutherford, E. H. Huntington, R. Ewart, C. C. Harb, B. Willke, E. K. Gustafson, M. M. Fejer, R. L. Byer, S. Rowan, and J. Hough, "Quantum noise in a continuous-wave laser-diode-pumped Nd:YAG linear optical amplifier," Opt. Lett. 23, 1852-1854 (1998)