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학술지 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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저자
김태용, 김성일, 곽민환, 강승범, 강광용, 김상배
발행일
201112
출처
IEEE/OSA Journal of Lightwave Technology, v.29 no.24, pp.3817-3823
ISSN
0733-8724
출판사
IEEE, OSA
DOI
https://dx.doi.org/10.1109/JLT.2011.2175199
협약과제
11PR2800, 테라헤르츠대역 전파 환경 및 무선 전송 플랫폼 기술 연구, 정태진
초록
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.
키워드
Semiconductor lasers, temperature dependence, vertical-cavity surface-emitting lasers (VCSELs)
KSP 제안 키워드
Driving circuit, Energy saving, Layer structure, Light sources, Oxide-aperture, Semiconductor lasers, Threshold current, Transient response, Turn-off, data transmission system, fall time