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Hiroaki OKANO Hideo OTSUKI Hisato UETSUKA Tatsuo TERAOKA Tsuneo SHIOTA Satoshi AOKI Shinji TSUJI
To realize a low-cost WDM transceiver module based on a PLC-platform, simple, assembly techniques have been successfully developed. The formation of index marks with an accuracy of below 0.1 µm has made it possible to mount Opto-electronic devices on the silicon terrace of the PLC-platform by a passive alignment. A newly developed trench formation technique for inserting a 1.3/1.5 µm WDM dielectric filter enabled us not only to ensure a stable WDM function but also to prevent excess loss associated with the dielectric filter scheme. It is found that these two technologies are practically useful to achieve high-performance WDM transceiver module.
Youhei ISHIKAWA Toshiro HIRATSUKA Sadao YAMASHITA Kenichi IIO
A TE010 mode dielectric resonator is proposed to be used in a millimeter-wave filter. The resonator was fabricated using the photolithographic technique, and high unloaded Q of 1610 was obtained at 60 GHz. A planar circuit type millimeter-wave filter, using TE010 mode dielectric resonators, was fabricated using NRD guides as input and output circuits. The measured filter characteristics agreed with calculated values well. The filter can be applicable to future millimeter-wave mobile communications systems.