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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Tsunoda, Y. Sugawara, M. Oku, H. Ide, S. Tanaka, K. |
| Copyright Year | 2014 |
| Description | Author affiliation: Fujitsu Labs., Atsugi, Japan (Tsunoda, Y.; Sugawara, M.; Oku, H.; Ide, S.; Tanaka, K.) |
| Abstract | High-speed and high-density interconnections between racks and modules in the high-performance computing systems and data centers are currently being developed. The transmission range of conventional electrical interconnections is limited due to the bandwidth of electrical channels. VCSEL-based optical interconnection technologies are a promising solution for overcoming bandwidth bottlenecks in large scale computing systems [1-3]. Although it is anticipated that the next challenge for optical interconnections is to move to a serial data-rate of 40Gb/s, there are few 40Gb/s class VCSELs at present. Overdriving is a method that boosts high-frequency response to overcome the VCSEL speed limit [4,5]. To develop high-density optical interconnections, a low-power over-driving IC is a key technology. In addition, the optical modulation amplitude (OMA) must be increased to enable long-distance transmission in large scale computing systems as a data center. To achieve this large modulation amplitude, we must overcome the jitter issue caused by the intrinsic group delay of VCSELs. In this paper, we present a 40Gb/s driver IC for over-driving a 25Gb/s VCSEL using a new 2-tap pre-emphasis circuit with tunable group-delay compensation. This circuit compensates for the complex group delay of VCSELs. With this circuit, we achieve 40Gb/s low-jitter operation with 2.3dBm OMA and reduce the power consumption to as low as 312mW/ch. |
| Starting Page | 154 |
| Ending Page | 155 |
| File Size | 1398391 |
| Page Count | 2 |
| File Format | |
| ISBN | 9781479909186 |
| ISSN | 01936530 |
| e-ISBN | 9781479909209 |
| DOI | 10.1109/ISSCC.2014.6757379 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-02-09 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Vertical cavity surface emitting lasers Delays Integrated circuits Optical interconnections Jitter High-speed optical techniques Integrated optics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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