Abstract

In earlier work,¹ it was demonstrated that diode laser frequency noise consists primarily of 1/f and spectrally white components, which cross typically between 0.1 and 1 MHz, depending on power level. The model is good out to a few hundred MHz, beyond which the noise spectrum increases to the relaxation oscillation and then decreases at higher frequencies. The white fm noise component alone produces a Lorentzian lineshape while the 1/f component alone leads to a Gaussian lineshape given reasonable limits on observation time. The total linewidth (fwhm), Δυ, results from the convolution of the Lorentzian, Δυ_L, and Gaussian, Δυ_g, components; the relationship among the components has been approximated empirically by.

© 1987 Optical Society of America