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http://dx.doi.org/10.5757/JKVS.2007.16.5.371

Comparisons of lasing characteristics of InGaAs quantum-dot and quantum well laser diodes  

Jung, Kyung-Wuk (Nano Device Research Center, Korea Institute of Science & Technology)
Kim, Kwang-Woong (Nano Device Research Center, Korea Institute of Science & Technology)
Ryu, Sung-Pil (Nano Device Research Center, Korea Institute of Science & Technology)
Cho, Nam-Ki (Nano Device Research Center, Korea Institute of Science & Technology)
Park, Sung-Jun (Nano Device Research Center, Korea Institute of Science & Technology)
Song, Jin-Dong (Nano Device Research Center, Korea Institute of Science & Technology)
Choi, Won-Jun (Nano Device Research Center, Korea Institute of Science & Technology)
Lee, Jung-Il (Nano Device Research Center, Korea Institute of Science & Technology)
Yang, Hae-Suk (Department of Physics, Chung Ang University)
Publication Information
Journal of the Korean Vacuum Society / v.16, no.5, 2007 , pp. 371-376 More about this Journal
Abstract
We have investigated the lasing characteristics of the InGaAs quantum dot laser diode (QD-LD) and InGaAs quantum well laser diode (QW-LD) operated at the 980 nm wavelength range. The 980-nm lasers are used as a pumping source for a erbium-doped fiber amplifier (EDFA) and it shows high efficiency in long-haul optical fiber network. We have compared the threshold current density, the characteristic temperature, the optical power and the internal efficiency of QD-LD and QW-LD under a pulsed current condition. The QD-LD shows superior performances to the QW-LD. Further optimization of a LD structure is expected to the superior performances of a QD-LD.
Keywords
quantum-dot; quantum-dot laser diode; InGaAs;
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Times Cited By KSCI : 4  (Citation Analysis)
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