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Proceedings Paper

Novel surface-mount-type fiber optic transmitter and receiver
Author(s): Toshiro Yoshida; Atsuhiro Kawatani; Kanji Shuke
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Paper Abstract

This paper presents novel surface mount type fiber optic transmitters and receivers suitable for mass-production and high-density installation to the PCBs of the communication equipment. The transmitters and receivers are applicable for SONET/SDH equipment and fulfill the specifications of ITU-T G.9571 and G.9582 recommendations. Conventional fiber optic transmitters and receivers have a pigtail cord fasten to their housing. Such a pigtail cord is a constraint factor for reflow soldering and machine mounting of the transmitters and receivers to the PCBs in the communication equipment manufacturing process. Therefore, simplified optical connectors, the pigtail fiber cords can be easily attached to them, has been developed. A conventional feedback APC circuit needs classical variable resistors to adjust LDs bias current (Ib) and pulse current (Ip). This method requires manual adjustment and sites for the variable resistors. The developed fiber optic transmitters are equipped with a digital feed-forward APC circuit to compensate Idc and Iac versus the ambient temperature change. In this method a ROM built into LSI stores data for Idc and Iac. APC operation is carried out by loading the data for the ROM and giving the data to digital-analog converters. The fiber optic receivers have clock regeneration function utilizing the PLL technology instead of conventional band-pass filter. This scheme aligns the phase delay between received data and extracted clock at the optimum position, thus no manual circuit adjustment is needed.

Paper Details

Date Published: 27 April 2000
PDF: 12 pages
Proc. SPIE 3952, Optoelectronic Interconnects VII; Photonics Packaging and Integration II, (27 April 2000); doi: 10.1117/12.384394
Show Author Affiliations
Toshiro Yoshida, NEC Corp. (Japan)
Atsuhiro Kawatani, NEC Corp. (Japan)
Kanji Shuke, NEC Corp. (Japan)

Published in SPIE Proceedings Vol. 3952:
Optoelectronic Interconnects VII; Photonics Packaging and Integration II
Michael R. Feldman; Richard Liqiang Li; Michael R. Feldman; Richard Liqiang Li; W. Brian Matkin; Suning Tang, Editor(s)

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