There are multiple definitions:

1. fiber Bragg grating(English)

   • made by laterally exposing the core of a single-mode fiber to a periodic pattern of intense laser light
   • PCF, BOCDA, DAQ, EOM, FUT, OLCR, OTDR
   • Laser technique, Bioengineering, Optics and vision
   • https://doi.org….1063/1.5113955
   • https://fbgs.co…/fbg-principle/
   • https://doi.org….1063/1.5113955

2. fasting blood glucose(English)

   • BG, BMI, FBG, LM, MAGE, PPGE, PPBG
   • Insulin, Diabetes, Clinical chemistry