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http://dx.doi.org/10.3807/KJOP.2006.17.2.191

A Multi-Section Complex-Coupled DFB Laser with a Very Wide Range of Self-Pulsation Frequency and High Modulation Index  

Kim, Boo-Gyoun (School of Electronic Engineering, Soongsil University)
Kim, Tae-Young (School of Electronic Engineering, Soongsil University)
Kim, Sang-Taek (School of Electronic Engineering, Soongsil University)
Kim, Sun-Ho (Photonics Research Center, korea institute of Science and Technology)
Park, Kyung-Hyun (Optical Devices Research Department, ETRI)
Publication Information
Korean Journal of Optics and Photonics / v.17, no.2, 2006 , pp. 191-197 More about this Journal
Abstract
We analyze the self-pulsation(SP) characteristics due to mode beating of two modes emitted in a multi-section complex-coupled (CC) DFB laser composed of two DFB sections and a phase control section between them. SP frequency due to mode beating of the two modes is determined by the difference of grating periods in the two CC DFB regions. As the difference of grating periods in the two CC DFB regions increases, the SP frequency increases from very low frequency to the THz region. In the case of a mode which is not located in the stop band of the other DFB region, the mode propagates into the other DFB region without a high reflection, so that output powers emitted in a multi-section CC DFB laser have high modulation indexes due to the large interaction between the two modes.
Keywords
Pulsation DFB lasers; Multi-section DFB lasers; Optical generation of millimeter waves; Terahertz wave generation; Photomixing methods;
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