To expand the submarine transmission capacity, higher OSNR is important. Higher OSNR can be realized by advanced optical fibers having low transmission loss and low nonlinearity. We successfully realized the lowest transmission loss of 0.1419 dB/km at 1560 nm wavelength. It was the first time to realize a 0.14 dB/km in 50 years history of silica-based optical fiber. This epoch-making result was enabled by reducing Rayleigh scattering. In addition, microbending loss was kept low using a new soft inner coating in spite of a 147μm2 large effective area. This achievement will contribute to further expansion of submarine transmission capacity.
Yoshiaki Tamura, "Ultra-low loss Ge-free silica core fiber for submarine transmission," Proc. SPIE 10561, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VII, 105610P (Presented at SPIE OPTO: January 31, 2018; Published: 29 January 2018); https://doi.org/10.1117/12.2295864.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 14,000 conference presentations, including many plenary and keynote presentations.
Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon