Kayıpların optik fiber veya optik fiber kristal için verimli olacağı durumu en iyisi deney yapıldıktan sonra elde edilen verim daha yararlı olur.

Dear Miami, losses of a photonic (crystal) fiber are generally much higher than for a common optical fiber (based on total internal reflection). In the telecom range, the losses of optical fibers are around 0.2 dB per km. Even in the visible range and for specialty fibers, the losses are typically below 10 dB per km. However, photonic/crystal fibers with solid core (e.g. endlessly single mode fibers) have 5-10 dB in the telecom range and dozens of dB in the visible. Hollow-core fibers might have even hundreds of dB per km. However, the technology of photonic fibers is developing rapidly, and we will probably observe the convergence of their parameters to the specs of common optical fibers. Best, Miroslav