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http://dx.doi.org/10.3807/HKH.2007.18.1.056

Effect of Gain Dispersion on the Characteristics of Self-Pulsation in a Multisection Complex-Coupled DFB Laser  

Kim, Tae-Young (School of Electronic Engineering, Soongsil University)
Kim, Boo-Gyoun (School of Electronic Engineering, Soongsil University)
Publication Information
Korean Journal of Optics and Photonics / v.18, no.1, 2007 , pp. 56-65 More about this Journal
Abstract
The effect of gain dispersion on the self-pulsation (SP) characteristics due to the mode beating of two modes emitted in a multisection DFB laser composed of two complex-coupled DFB sections and a phase control section is investigated. When the peak wavelength, ${\lambda}_{p}$, of the gain spectrum of the DFB section is positioned in the center of the lasing wavelengths or the Bragg wavelengths of the two DFB sections, the maximum SP frequencies are higher and the modulation index has better characteristics compared to those cases for ${\lambda}_{p}$ fixed at the lasing wavelength or Bragg wavelength of one DFB section, when the difference between the Bragg wavelengths of the two DFB sections, ${\Dalta}{\lambda}_{B}$, is varied. When ${\lambda}_{p}$ is positioned in the renter of the Bragg wavelengths of the two DFB sections, the maximum SP frequency is higher and of the modulation index has better characteristics compared to those of the case for ${\lambda}_{p}$ positioned in the center of the lasing wavelengths of the two DFB sections.
Keywords
Gain spectrum; Multisection DFB laser; Optical terahertz wave; Photomixing methods; Dual mode laser; High modulation index;
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Times Cited By KSCI : 1  (Citation Analysis)
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