What does the spectrum of Chlorophyll fluorescence look like?
I think for your purpose you should start, for example, with this link:
https://academic.oup.com/jxb/article/60/11/2987/533160

UPD:

Chlorophyllous tissues emit radiation of wavelengths approximately 680-760 nm. Source: Plant Physiological Ecolgy, Second edition, Hans Lambers, F.Stuart Chapin III and Thijs L. Pons, New York : Springer, c2008, p. 37, Box 2A.4 Chlorophyll Fluorescence