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Small and Low-Cost Dual-Rate Optical Triplexer for OLT Transceivers in 10G/1G Co-existing 10G-EPON Systems
Atsushi KANDA Akira OHKI Takeshi KUROSAKI Hiroaki SANJOH Kota ASAKA Ryoko YOSHIMURA Toshio ITO Makoto NAKAMURA Masafumi NOGAWA Yusuke OHTOMO Mikio YONEYAMA
IEICE TRANSACTIONS on Electronics
Publication Date: 2013/07/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Advances in Integrated Photonic Devices)
10G-EPON, triplexer, light collection system, miniaturization, cost reduction,
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The 10-gigabit Ethernet passive optical network (10G-EPON) is a promising candidate for the next generation of fiber-to-the-home access systems. In the symmetric 10G-EPON system, the gigabit Ethernet passive optical network (GE-PON) and 10G-EPON will have to co-exist on the same optical network. For this purpose, an optical triplexer (10G-transmitter, 1G-transmitter, and 10G/1G-receiver) for optical line terminal (OLT) transceivers in 10G/1G co-existing EPON systems has been developed. Reducing the size and cost of the optical triplexer has been one of the largest issues in the effort to deploy 10G-EPON systems for practical use. In this paper, we describe a novel small and low-cost dual-rate optical triplexer for use in 10G-EPON applications. By reducing the optical path length by means of a light collection system with a low-magnification long-focus coupling lens, we have successfully miniaturized the optical triplexer for use in 10G-EPON OLT 10-gigabit small form factor pluggable (XFP) transceivers and decreased the number of lenses. A low-cost design of sub-assemblies also contributes to cost reduction. The triplexer's performance complies with IEEE 802.3av specifications.