Lasers, Fiber Optics, and Communications

Low-cost TO-CAN package combined with flexible and hard printed circuit boards for 25-Gb/s optical subassembly modules

[+] Author Affiliations
Jau-Ji Jou, Tien-Tsorng Shih, Cheng-Ying Wu, Zhe-Xian Su

National Kaohsiung University of Applied Sciences, Department of Electronic Engineering, Kaohsiung, Taiwan

Opt. Eng. 56(2), 026108 (Feb 08, 2017). doi:10.1117/1.OE.56.2.026108
History: Received November 30, 2016; Accepted January 20, 2017
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Abstract.  A low-cost transistor outline-CAN (TO-CAN) package, which is combined with flexible printed circuit board (PCB) and hard PCB, has been developed for a 25-Gb/s optical subassembly module. On the flexible PCB, the transmission line structure used top ground microstrip line, and the wider transmission bandwidth can be obtained. Using ground pads and ground notch technologies, the impedance of connection between flexible PCB and hard PCB was designed to match with the impedances of signal traces of the flexible and hard PCBs. In the TO-CAN package, a TO-46 header was used, and the header needs to closely connect with the flexible PCB. The bandwidth of TO-46 package combined with flexible and hard PCBs can achieve above 23 GHz. The clear 25-Gb/s transmission eye diagram was also measured, and the rise time, fall time, and Q-factor of the eye diagram are 13.78, 13.56 ps, and 8.76, respectively. The TO-46 package combined with flexible and hard PCBs has been verified to be suitable for application in 25-Gb/s optical subassembly modules.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Jau-Ji Jou ; Tien-Tsorng Shih ; Cheng-Ying Wu and Zhe-Xian Su
"Low-cost TO-CAN package combined with flexible and hard printed circuit boards for 25-Gb/s optical subassembly modules", Opt. Eng. 56(2), 026108 (Feb 08, 2017). ; http://dx.doi.org/10.1117/1.OE.56.2.026108


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