Modeling and experiments of O-band transmission over G.654.C optical fiber.

We address the potential application of G.654.C optical fiber for O-band transmission in the wavelength range of 1270 nm to 1330 nm. Fiber samples at the extreme upper end of the cable cutoff manufacturing distribution are chosen for modeling and experimentation. Modeling of multipath interference (MPI) generation in bend conditions representative of cable deployment suggests minimal to negligible penalty and transmission experiments at 100 Gb/s and 400 Gb/s with commercial IMDD transceivers demonstrate longer transmission with increased power margin compared to standard G.652 fiber due to lower O-band attenuation and no adverse impacts from MPI.

Using phase-corrected Bessel beams to cut glass substrates with a chamfered edge.

Ultrafast laser cutting of a glass substrate at an oblique angle is demonstrated using a phase-corrected Bessel beam. Simulations are used to predetermine the ideal phase of the incident Bessel beam such that an unaberrated Bessel beam is formed inside the tilted substrate. Additional corrections to the beam such as shortening, moving the intensity of the beam within the substrate, and the formation of an elliptical focal spot were necessary to ensure consistent chamfering of the substrate and are discussed herein. Three cuts are combined to create a damage tract in the glass substrate in the shape of a chamfer, and then the glass is separated using a CO2 laser resulting in a chamfered edge.