Novel surface-mount-type fiber optic transmitter and receiver

Toshiro Yoshida; Atsuhiro Kawatani; Kanji Shuke

doi:10.1117/12.384394

27 April 2000 Novel surface-mount-type fiber optic transmitter and receiver

Toshiro Yoshida, Atsuhiro Kawatani, Kanji Shuke

Proceedings Volume 3952, Optoelectronic Interconnects VII; Photonics Packaging and Integration II; (2000) https://doi.org/10.1117/12.384394
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

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.

Citation Download Citation

Toshiro Yoshida, Atsuhiro Kawatani, and Kanji Shuke "Novel surface-mount-type fiber optic transmitter and receiver", Proc. SPIE 3952, Optoelectronic Interconnects VII; Photonics Packaging and Integration II, (27 April 2000); https://doi.org/10.1117/12.384394

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KEYWORDS

Transmitters

Receivers

Fiber optics

Temperature metrology

Clocks

Resistors

Optical alignment

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