Dependence of the relative spectral noise density of light intensity fluctuations for LED-A, -B, and -C as a function of current on a log scale. The frequency of analysis is .
External quantum efficiency (EQE) of the LEDs as a function of current on a log scale.
Current-voltage characteristics of the LEDs.
Relative spectral noise density of the light intensity fluctuations as function of the wavelength within the LED spectral line for the LED-C (solid lines and error bars). The emission spectra of the LED are also shown (dashed lined) as a reference. The frequency of analysis is .
(a) Relative spectral noise density of light intensity fluctuations as a function of the current for the LED-C. The open symbols show the light intensity noise when the entire LED spectrum is included in the noise measurements. The filled symbols are the integrals obtained from the measurements at different wavelengths assuming correlated (circles) and uncorrelated (triangles) fluctuations. The filled symbols are shifted left for clarity. (b) Current dependence of the relative spectral noise density of the LED current noise .
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