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Journal Article
Fixed-Current Operation of a VCSEL Transmitter over a Temperature Range from -20°C to 80°C using an Elevated-Oxide-Layer Structure
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- Authors
- Taeyong Kim, Sungil Kim, Min Hwan Kwak, Seung Beom Kang, Kwang-Yong Kang, Sang-Bae Kim
- Issue Date
- 2011-12
- Citation
- IEEE/OSA Journal of Lightwave Technology, v.29, no.24, pp.3817-3823
- ISSN
- 0733-8724
- Publisher
- IEEE, OSA
- Language
- English
- Type
- Journal Article
- Abstract
- We have demonstrated fixed-current operation of a vertical-cavity surface-emitting laser (VCSEL) transmitter operating at 1.25 Gb/s over a wide temperature range by using an elevated-oxide-layer structure. Four different types of oxide VCSELs have been prepared for the transmitter modules; conventional-oxide and elevated-oxide-layer VCSELs with the oxide-aperture diameter of 6.6 and 10 쨉m, and their temperature dependence of the threshold current and turn-off transient responses have been measured. Approximately 10%-reduced both fall time and timing jitter mainly originating from the alleviated turn-off-induced abnormalities in the elevated-oxide-layer VCSEL transmitters contributed to achieve the fixed-current operation in the temperature range from ?닋20°C to 80°C. Although the operating current of the elevated-oxide-layer VCSEL transmitter should be increased as the threshold current increases, a simple driving circuit owing to the fixed-current operating transmitter over a wide temperature range will bring a drastic energy saving in the optical data transmission system that incorporates VCSEL as a light source. © 2011, IEEE. All rights reserved.
- KSP Keywords
- Driving circuit, Energy saving, Layer structure, Light source, Oxide-aperture, Threshold current, Transient response, Turn-off, Vertical-cavity surface-emitting laser, Wide temperature range, data transmission system