This is often referred to as the fundamental mode cut-off, or bend edge.
![cut off wavelength equation cut off wavelength equation](https://doubtnut-static.s.llnwi.net/static/ss/web/352482.jpg)
![cut off wavelength equation cut off wavelength equation](https://www.ibpsguide.com/wp-content/uploads/2019/12/Quants-Aptitude-Practice-Q-1080.jpg)
For the electrons emitted from the Sodium surface, calculate: - The maximum Kinetic Energy of. If you need Single Mode operation, you should choose the fiber type with the closest cut-off wavelength range below the operating wavelength of your optical source. The emitted electrons travel towards a negatively charged cathode. HB450, SM600 etc.) typically represents the ‘nominal’ cut-off wavelength.
CUT OFF WAVELENGTH EQUATION CODE
When referring to Fibercore products, the number in the fiber product code (i.e. At wavelengths just below the cut-off, a few modes may be guided, whilst multi-mode fiber operates far below the second order cut-off point. Cut-off wavelength is important because, in most cases, it determines your choice of fiber type. The second order mode cut-off wavelength (commonly shortened to cut-off) refers to the wavelength above which the fiber is single-mode only at wavelengths above the cut-off will the fiber guide be single-mode.