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)