Connection Characteristics of Hollow-Core Fiber Connector

Optical Fiber Connector Technology

“…On the other hand, at the connection point there is no Fresnel reflection at the fiber end because the refractive index of HCF core is the same as air, and HCF has large tolerance of gap between fibers because it has very small numerical aperture, no PC connector is required. Figure 10 shows the HCF connector using a thin glass plate attached obliquely to a ferrule endface [35], [36]. A typical HCF connector attenuation of 0.5 dB and a return loss of 50 dB are reported.…”