[Optics] Questions on the Stokes shift

[rinalai]

Homework Statement

Is it better to have a large or small Stokes shift, from a practical point of view?

Relevant Equations

NA

Here is my answer to this question:

Stokes shift is the difference in wavelength between positions of the band maxima of the excitation and emission spectra of the same electronic transition.​

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When Stokes shift is large, it means there is more energy loss, which is not favorable regarding energy efficiency. Thus, it is usually better to have a small Stokes shift.​

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On the other hand, with a larger Stokes shift, meaning that there is a greater wavelength difference between the excitation and emission light, resulting in a higher signal-to-noise ratio(SNR), which makes it easier to identify the fluorescence emission from the particles we are observing.​

Are these statements correct?
Any comments and suggestions will be appreciated.

 

[HAYAO]

I have no idea what it means to be "practical". Practical in what sense?

On the other hand, with a larger Stokes shift, meaning that there is a greater wavelength difference between the excitation and emission light, resulting in a higher signal-to-noise ratio(SNR), which makes it easier to identify the fluorescence emission from the particles we are observing.​

Why do you think that larger Stokes shift lead to higher SNR?