Liu Gonghai, Zhao Gongyuan, Sun Junqiang, Gao Dingshan, Lu Qiaoyin, Guo Weihua
Opt Express. 2018 Nov 12;26(23):29784-29795. doi: 10.1364/OE.26.029784.
We experimentally demonstrated DFB lasers containing an active distributed reflector that has the same waveguide core as the active section. Although without current injection, the distributed reflector will be optically pumped to near transparency by the laser itself, and therefore can provide relatively high reflection to the laser. The laser, fabricated with processing steps similar to standard DFB lasers, has achieved 10-mA threshold current, 0.38-mW/mA slope efficiency, above 55-dB side mode suppression ratio, and 24-GHz modulation bandwidth at 60-mA current injection. 28-Gb/s transmission over 10-km single-mode fibers with a power penalty of less-than 0.5 dB has been demonstrated as well.
我们通过实验证明了包含有源分布式反射器的分布反馈（DFB）激光器，该反射器与有源区具有相同的波导芯。尽管没有电流注入，但分布式反射器会被激光器自身光泵浦至接近透明状态，因此能为激光器提供相对较高的反射率。该激光器采用与标准DFB激光器类似的加工步骤制造，在注入60 mA电流时，实现了10 mA的阈值电流、0.38 mW/mA的斜率效率、高于55 dB的边模抑制比以及24 GHz 的调制带宽。同时也证明了在10 km单模光纤上实现了28 Gb/s的传输，功率代价小于0.5 dB。
