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Spectral aspect of degradation in 1.55 mu m long-cavity MQW DFB lasers

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4 Author(s)
Fukuda, M. ; NTT Opto-Electron. Lab., Kanagawa, Japan ; Kano, F. ; Kurosaki, T. ; Yoshida, J.

Degradation behaviors, particularly for the increase in spectral linewidth and FM efficiency, in 1.55 mu m long-cavity MQW (multiple quantum well) DFB (distributed feedback) lasers, with a spectral linewidth of around 1 MHz, are presented from the viewpoint of coherent system application. Through the clarification of the behaviors, it is shown that highly coherent lasers are sufficiently durable in coherent transmission systems.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:4 ,  Issue: 4 )