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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Differential Signal Modulation for 10Gb/s Coaxial Laser Module Packaging

Huang, Zhi-jia 14 July 2009 (has links)
In this study, we present a 10-Gb/s coaxial-type laser modules package with signal input of single-end and differential-end designs, separately. By using the method of coaxial-type package with low-cost and high-performance characteristics, it can be applied to high-speed optical fiber communication, fiber to the home (FTTH), and passive-optical-network (PON) applications. Because the structure of traditional TO-Can header without proper modification, the laser module with single-end signal input design results in poor RF transmission characteristic. The notch filter effect induced by the parasitic inductance of the long lead and wires is becoming the traditional TO-Can¡¦s one of the major factors. A coaxial-type laser module with commercial TO-Can materials and an internal matching resistor of 18 ohms to reduce the signal reflection is used in this work. In single end signal modulation, The proposed coaxial laser module is fitted with an internal matching resistor of 18£[ to reduce the signal reflection. With the transmission signal of 231-1 and 10Gb/s operation, the coaxial-type laser module with single-end input can meet the mask of OC-192 standard and 26% eye mask margin. The laser module with the design of differential-end signal input that has two reverse voltage V+ and V- can reduce effect of the common-mode noise. Because the differential-signal input with shunt connection was adopted, the matching resistor of 39ohm was used for impedance matching. In addition, the laser module with common-mode signal input was also used to compare. The laser module with common-mode signal input was measured with ER (extinction-ratio) of 3.5dB and Jitter of 23ps. Due to the laser submount without optimization design, the laser module with differential-mode signal input can not be measured a good result.

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