We investigate the intensity noise induced by pump-power fluctuations in a diode-pumped single-frequency codoped Tm–Ho:YAG laser and we measure, in the frequency domain, the corresponding transfer function. Good agreement between the measured transfer functions and the theoretical prediction is found. A relative intensity-noise level of ~- 110 dB/Hz from ~1 kHz to the relaxation-oscillation frequency, with complete suppression of the relaxation-oscillation peak, is achieved by use of a suitable optoelectronic feedback circuit.
© 2000 Optical Society of America
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3430) Lasers and laser optics : Laser theory
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3570) Lasers and laser optics : Lasers, single-mode
(140.3590) Lasers and laser optics : Lasers, titanium
S. Taccheo, G. Sorbello, P. Laporta, and C. Svelto, "Suppression of intensity noise in a diode-pumped Tm—Ho:YAG laser," Opt. Lett. 25, 1642-1644 (2000)