NDLI: Low-Cost TO-Can Header for Coaxial Laser Modules in 25-Gbit/s Transmission Applications

Content Provider	IEEE Xplore Digital Library
Author	Tien-Tsorng Shih Pei-Hao Tseng Hao-Wei Chen Ching-Cheng Tien Sung-Mao Wu Wood-Hi Cheng
Copyright Year	2011
Abstract	A new transistor outline-Can (TO-Can) header for a low-cost coaxial laser module for 25-Gbit/s transmission is proposed and demonstrated using a 3-D full-wave electromagnetic simulation. The simulation result is compared with the measured results of a conventional TO-56 header to verify its applicability. A two-section feedthrough hole is employed, and a wire-over-ground feed lead is introduced to overcome the impedance matching problems. The simulation results show that the proposed TO-Can header provides a transmission bandwidth in excess of 40 GHz and reflection loss less than -10 dB below 26 GHz, with an ideal 50-Ω terminal. Taking the bonding wires into account, the transmission bandwidth still reaches 28 GHz. The electrical characteristics of this TO-Can package were extracted and combined with a small-signal equivalent circuit model of a 24.5-GHz laser diode to simulate the electrical characteristics of a full coaxial laser module. The 3-dB bandwidth is 20.5 GHz, which allows the laser module to operate at 25 Gbit/s. This superior TO-Can header provides a low-cost coaxial laser package solution and can be applied in the emerging 21-Gbit/s fiber channel (20 GFC) and 100-gigabit (4 × 25 Gbit/s) Ethernet (100 GbE) networks.
Starting Page	557
Ending Page	565
Page Count	9
File Size	1224096
File Format	PDF
ISSN	21563950
Volume Number	1
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Feeds Lead Impedance Connectors Bandwidth Glass Wires transmitter optical subassembly 100-Gigabits Ethernet 100GbE 20GFC coaxial laser package fiber channel TO-Can
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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