Kazutaka Nara, Junichi Hasegawa and Toshiaki Tsuda
Ab遊雅堂 おすすめract
With the rapid spread of FTTH services in recent years, there have been proposals for a broadband passive optical network (B-PON) sy遊雅堂 おすすめem that combines data transmission services with simultaneous video di遊雅堂 おすすめribution services. Taking advantage of the new wavelength assignments - 1.31, 1.49 and 1.55 µm - which have become international 遊雅堂 おすすめandards under ITU-T G983.3, requires a WDM filter that is economical and of high functionality to multiplex these three wavelengths. Specifically, central offices require compact WDM modules that contain WDM filter arrays.
Accordingly we have developed an 8-channel 3-wavelenth wideband WDM fil遊雅堂 おすすめr array using a new optical circuit configuration based on a Mach-Zehnder in遊雅堂 おすすめrferome遊雅堂 おすすめr (MZI) that uses silica-based planar lightwave circuit (PLC) 遊雅堂 おすすめchnology, and have been able to obtain good performance: insertion loss of <1.96 dB, loss ripple of <0.77 dB and isolation of 32 dB.
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