1-5hit |
Takashi YAMADA Toshikazu HASHIMOTO Takaharu OHYAMA Yuji AKAHORI Akimasa KANEKO Kazutoshi KATO Ryouichi KASAHARA Mikitaka ITO
We have developed a new planar lightwave circuit (PLC) platform eliminating Si terraces for hybrid integrated optical modules. This PLC platform has the advantage of a lower fabrication cost than the conventional PLC platform with an Si terrace, because it does not require fabrication processes such as Si terrace forming and mechanical polishing. Using our new PLC platform structure, we fabricated a transceiver for optical access networks and an 8-channel multi-channel photoreceiver for wavelength division multiplexing (WDM) interconnection systems.
Takashi YAMADA Toshikazu HASHIMOTO Takaharu OHYAMA Yuji AKAHORI Akimasa KANEKO Kazutoshi KATO Ryouichi KASAHARA Mikitaka ITO
We have developed a new planar lightwave circuit (PLC) platform eliminating Si terraces for hybrid integrated optical modules. This PLC platform has the advantage of a lower fabrication cost than the conventional PLC platform with an Si terrace, because it does not require fabrication processes such as Si terrace forming and mechanical polishing. Using our new PLC platform structure, we fabricated a transceiver for optical access networks and an 8-channel multi-channel photoreceiver for wavelength division multiplexing (WDM) interconnection systems.
Takeshi KUROSAKI Toshikazu HASHIMOTO Noboru ISHIHARA Yasuhiro SUZUKI Masahiro YANAGISAWA Hideaki KIMURA Makoto NAKAMURA Yuichi TOHMORI Kazutoshi KATO Yoshihiro KAWAGUCHI Yuji AKAHORI Yasufumi YAMADA Kuniharu KATO Hiromu TOBA Junichi YOSHIDA
This paper describes design techniques for suppressing crosstalk in an optical transceiver module using PLC-hybrid-integration technologies and for achieving burst-mode operation with high sensitivity and wide dynamic range using CMOS-IC technologies. An arrangement that reduces the electrical crosstalk to less than -100 dB was designed using three-dimensional electromagnetic field analysis. The configurations of a newly developed instantaneous-response CMOS LD driver circuit is also described and instantaneous-response CMOS receiver circuit techniques are reviewed. With these techniques, we have succeeded in building optical transceiver modules for ATM-PON systems using PLC-hybrid-integration and inexpensive standard CMOS-IC fabrication processes. Under full-duplex operation at 156 Mb/s, fabricated transceiver modules showed receiver sensitivity of better than -34 dBm and dynamic range of over 28 dB, which satisfy both the class-B and class-C specifications recommended by ITU-T (International Telecommunication Union-Telecommunication standardization sector) G983.1 for the optical transceiver module for an ONU (optical network unit).
Takeshi KUROSAKI Toshikazu HASHIMOTO Noboru ISHIHARA Yasuhiro SUZUKI Masahiro YANAGISAWA Hideaki KIMURA Makoto NAKAMURA Yuichi TOHMORI Kazutoshi KATO Yoshihiro KAWAGUCHI Yuji AKAHORI Yasufumi YAMADA Kuniharu KATO Hiromu TOBA Junichi YOSHIDA
This paper describes design techniques for suppressing crosstalk in an optical transceiver module using PLC-hybrid-integration technologies and for achieving burst-mode operation with high sensitivity and wide dynamic range using CMOS-IC technologies. An arrangement that reduces the electrical crosstalk to less than -100 dB was designed using three-dimensional electromagnetic field analysis. The configurations of a newly developed instantaneous-response CMOS LD driver circuit is also described and instantaneous-response CMOS receiver circuit techniques are reviewed. With these techniques, we have succeeded in building optical transceiver modules for ATM-PON systems using PLC-hybrid-integration and inexpensive standard CMOS-IC fabrication processes. Under full-duplex operation at 156 Mb/s, fabricated transceiver modules showed receiver sensitivity of better than -34 dBm and dynamic range of over 28 dB, which satisfy both the class-B and class-C specifications recommended by ITU-T (International Telecommunication Union-Telecommunication standardization sector) G983.1 for the optical transceiver module for an ONU (optical network unit).
Shinji TSUJI Ryuta TAKAHASHI Takeshi KATO Fumihiko UCHIDA Satoru KIKUCHI Toshinori HIRATAKA Masato SHISHIKURA Hiroaki OKANO Tsuneo SHIOTA Satoshi AOKI
Precise direct mounting of laser diode (LD) and photodiode (PD) chips on silica planar lightwave circuits (PLCs) has been investigated for application to transceiver modules. To achieve submicron optical alignment, self-aligned index marks on the PLCs and LDs were directly detected by transmission infrared light. The repeatability of the positioning was measured to be within 0.125 µm. The output power of the resultant module was 0.2 mW at 80 mA. A waveguide-type PD was also mounted in the same way, and module sensitivity of 0.25 A/W was demonstrated.