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Relationship between Transverse-Mode Behavior and Dynamic Characteristics in Multi-Mode VCSELs  

Kim Bong-Seok (R&D center, SYhitech co.)
Kim Sang-Bae (Department of Electrical Eng., Ajou University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.42, no.12, 2005 , pp. 19-26 More about this Journal
Abstract
We have studied the relationship between static mode behavior and dynamic characteristics of multiple transverse-mode VCSELs by measuring the modal L-I and I-V characteristics. Dependence of the resonance frequencies of RIN (relative intensity noise) spectra on the injection current can be understood by modal L-I characteristics and mode-coupling effects. Each transverse mode behaves as an independent diode laser with the different threshold current in large active-area VCSELs, and the multiple-step turn-on is observed when step-current input is applied. This multiple-step turn-on is a result of different turn-on delay times of the transverse modes. Since the multiple-step turn-on increases the rise-time significantly, the wide active-area VCSELs are not suitable for high-speed optical transmitters unless the input current is adjusted for single transverse-mode operation.
Keywords
광통신;반도체 레이저;수직 공진기 레이저;
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Times Cited By KSCI : 1  (Citation Analysis)
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