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학술지 Proposal and Analysis of Distributed Reflector-Laser Diode Integrated with an Electroabsorption Modulator
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권오기, 백용순, 정윤철, Hyung-Moo Park
ETRI Journal, v.35 no.3, pp.459-468
한국전자통신연구원 (ETRI)
12MB2200, 100G 이더넷용 광송수신기 개발, 백용순
A novel integrated laser, that is, a distributed reflector laser diode integrated with an electroabsorption modulator, is proposed to improve the output efficiency, single-mode stability, and chirp. The proposed laser can be realized using the selective metalorganic vapor phase epitaxy technique (that is, control of the width of the insulating mask), and its fabrication process is almost the same as the conventional electroabsorption modulated laser (EML) process except for the asymmetric coupling coefficient structure along the cavity. For our analysis, an accurate time-domain transfer-matrix-based laser model is developed. Based on this model, we perform steady-state and large-signal analyses. The performances of the proposed laser, such as the output power, extinction ratio, and chirp, are compared with those of the EML. Under 10-Gbps NRZ modulation, we can obtain a 30% higher output power and about 50% lower chirp than the conventional EML. In particular, the simulation results show that the chirp provided by the proposed laser can appear to have a longer wavelength side at the leading edge of the pulse and a shorter wavelength side at the falling edge. © 2013 ETRI.
KSP 제안 키워드
Coupling Coefficient, Domain transfer, Electroabsorption modulated laser(EML), Integrated laser, Laser diode(LD), Leading edge, Metalorganic vapor-phase epitaxy, Output power, Single mode, asymmetric coupling, electroabsorption modulator(EAM)