Low-cost and highly manufacturable 10Gb/s mini-flat transmitter for ethernet applications

Shin-Ge Lee; Chih-Li Chen; Chu-Li Chao; Chun-Hsing Lee; Chen-Kun Chen; Li-Chun Liao; Chih-Hao Hsu; Fu-Yi Cheng; Cheng-Hung Tsai; Min-Fa Huang; Chiung-Hung Wang; Mu-Tao Chu

doi:10.1117/12.575901

31 January 2005 Low-cost and highly manufacturable 10Gb/s mini-flat transmitter for ethernet applications

Shin-Ge Lee, Chih-Li Chen, Chu-Li Chao, Chun-Hsing Lee, Chen-Kun Chen, Li-Chun Liao, Chih-Hao Hsu, Fu-Yi Cheng, Cheng-Hung Tsai, Min-Fa Huang, Chiung-Hung Wang, Mu-Tao Chu

Author Affiliations +

Proceedings Volume 5624, Semiconductor and Organic Optoelectronic Materials and Devices; (2005) https://doi.org/10.1117/12.575901
Event: Asia-Pacific Optical Communications, 2004, Beijing, China

Abstract

The key issues of local-area-network (LAN) and storage-area-network (SAN) applications are to improve cost, manufacturability and reliability of optoelectronic devices in high speed transmission. The authors have demonstrated highly manufacturability, reliability and thermal stability mini-transmitter for 10Gb/s Ethernet applications in this paper. Passive alignment technology is a way to improve manufacturability of optoelectronic devices in the future. However, the assembly yield rate of conventional LD chip on silicon optical bench to fiber is quite limited due to restricted optical alignment tolerance (< 1μm). In this study, a novel two lens structure of 10Gb/s LC receptacle type optical mini-flat transmitter is designed and demonstrated to exhibit above 20% coupling efficiency with less than ±6um aligned deviation. Moreover, a high resistivity silicon optical bench (1kΩ/cm) and pressure-free bonding technique using the electroplated AuSn solder are also adopted to guarantee the transmitted performance in high frequency operation. The eye diagram of 10Gb/s mini-flat transmitter developed in this study showing the excellent quality obtained passing 10Gb/s Ethernet mask test with 20% margin. And the extinction ratio of transmitter is also proved to above 6dB at room temperature. The response of monitor PD is also examined up to 80% by mirror coating on silicon V-groove. Thermal stability of 10Gb/s mini-flat transmitter is another critical issue in high speed transmission. The performance of temperature stabilized transmitter over wide case temperature range is also evaluated in this study. The optical eye diagram of 10Gb/s transmitter developed in this paper showing excellent eye quality passing 10Gb/s Ethernet mask test between 0°C to 80°C. Finally, the reliability of transmitter is also performed. The reliability data indicate that the optical alignment of these modules are stable and observed essentially low variations in optical coupling as results of 1000 hours damp heat and 1000 temperature cycling durations.

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Shin-Ge Lee, Chih-Li Chen, Chu-Li Chao, Chun-Hsing Lee, Chen-Kun Chen, Li-Chun Liao, Chih-Hao Hsu, Fu-Yi Cheng, Cheng-Hung Tsai, Min-Fa Huang, Chiung-Hung Wang, and Mu-Tao Chu "Low-cost and highly manufacturable 10Gb/s mini-flat transmitter for ethernet applications", Proc. SPIE 5624, Semiconductor and Organic Optoelectronic Materials and Devices, (31 January 2005); https://doi.org/10.1117/12.575901

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KEYWORDS

Transmitters

Silicon

Optical alignment

Eye

Manufacturing

Reliability

Metals

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