Study of cascaded tunable DFB semiconductor laser with wide tuning range and high single mode yield based on equivalent phase shift technique
Study of cascaded tunable DFB semiconductor laser with wide tuning range and high single mode yield based on equivalent phase shift technique
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DOI：
10.1016/j.optcom.2015.04.077
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发表时间：
2015-10
影响因子：
2.4
通讯作者：
Lianyan Li;Song Tang;Jun Lu;Yue-chun Shi;Baoli Cao;Xiangfei Chen
中科院分区：
文献类型：
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作者：
Lianyan Li;Song Tang;Jun Lu;Yue-chun Shi;Baoli Cao;Xiangfei Chen
利用等效相移(EPS)技术设计并制作了级联结构的可调谐分布反馈(DFB)半导体激光器。实验演示了波长间隔为50 GHz和100 GHz的32波分复用(WDM)信道。在这种可调谐激光器中，可以通过引入EPS来保证单模运转，并且可以通过具有特定采样周期的级联部分结合芯片加热来实现波长调谐。该方法具有单模特性好、制作成本低、单片集成的可行性等优点。实验结果表明，该激光器的调谐范围可达25 nm，大部分通道的边模抑制比(SMSR)均在40dB以上。该激光器在波分复用系统中具有良好的性价比应用前景。
The tunable distributed feedback (DFB) semiconductor lasers with cascaded configuration were designed and fabricated using equivalent phase shift (EPS) technique. 32-wavelength division multiplexing (WDM) channels with 50-GHz and 100-GHz wavelength spacing were experimentally demonstrated. In such a tunable laser, single mode operation can be ensured by introducing EPS and the wavelength tuning can be realized by cascaded sections with specific sampling periods combining with chip heating. The proposed approach has some advantages such as good single mode property, low fabrication cost and feasibility of monolithic integration. The experimental results show that the tuning range can be nearly up to 25 nm and the side mode suppression ratios (SMSRs) of most channels are above 40 dB. The proposed laser should be promising for cost-effective applications in WDM systems.