https://scholars.lib.ntu.edu.tw/handle/123456789/636998
標題: | Comparison of Different Grating Structure DFB Lasers for High-speed Electro-absorption Modulated Lasers | 作者: | Sulikhah, Siti Lee, San Liang HEN-WAI TSAO |
關鍵字: | Electro-absorption Modulator | Optical Interconnect | Partial Grating | Quarter-Wave-Shifted | Uniform Grating | 公開日期: | 1-一月-2022 | 來源出版物: | International Conference on Photonics, Optics and Laser Technology | 摘要: | High-speed electro-absorption modulated lasers (EMLs) with three DFB laser structures (uniform grating (UG), asymmetric quarter-wave-shifted (QWS), and partially corrugated grating (PCG)) are investigated here under 56-Gb/s NRZ signal modulation. It is known that the former UG-EML suffers from performance degradation due to the residual facet reflection (RFR) and facet phase fluctuation. PCG-EML with 300-µm long laser section, 175-µm long grating section, 100-µm long modulator section, and 10-3 front-facet reflectivity can produce about ~83.8% dynamic single-mode yield (SMY), improved average Q-value, and reduced low-frequency drop (LFD) in the modulation response. By choosing the optimal grating length for the PCG-DFB and applying an asymmetric QWS-DFB, the EMLs can maintain good static- and dynamic performances over a wide range of the linear gain coefficients. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/636998 | ISBN: | 9789897585548 | DOI: | 10.5220/0010996600003121 |
顯示於: | 電機工程學系 |
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