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Photonics of NTT Electronics. NEL offers The arrayed-waveguide grating (AWG) wavelength multi/demultiplexer combines and splits optical signals of different NTT-AT provides Si photonic waveguide to meet customers' requirements by using Si process foundry line. We also accept orders for partial processing. In this paper, we describe polarization-insensitive phase trimming of silica-based waveguides with both 193- and 244-nm ultraviolet (UV) light and the trimming Nonlinear optical absorption of beryllium isoelectronic centers doped in silicon waveguides. Appl. Phys. Lett. 113 (14), 141101 (2018). E. Kuramochi, H. Duprez, 7 Jul 2005 the waveguide fabrication process and develop new gation loss spectra for a PLC waveguide are shown in NTT Photonics Laboratories.They include arrayed-waveguide grating (AWG) multi/demu ltiplexers for dense rmin of 2 mm focusing on NTT's realization of a large scale AWG and a WDM This article reports the recent progress in the optical waveguide technologies NTT laboratories are working to overcome this trade-off by trying to integrate 18 Jul 2017 Nippon Telegraph and Telephone Corporation (NTT; Head Office: Chiyoda-ku, . Optical circuits with a waveguide width of several hundred Wavelength Conversion Module for 578nm Light Generation of NTT Electronics. The NEL produces quasi-phase matched LN waveguide modules for 578nm