CAJ | 학술논문

以多模干涉耦合器为主体，通过载流子注入效应所引起的折射率改变来调整二重像之间的相位差，当折射率下降所引起的相位改变达到π相位时完成开关功能。在AlGaAs/GaAs/AlGaAs外延材料上，利用两步湿法腐蚀工艺，实际制作了2×2光开关并进行了测试。测试结果表明，工作在1.55μm波段，当注入电流达到160mA时，完成了开关功能。
이다모간섭우합기위주체，통과재류자주입효응소인기적절사솔개변래조정이중상지간적상위차，당절사솔하강소인기적상위개변체도π상위시완성개관공능。재AlGaAs/GaAs/AlGaAs외연재료상，이용량보습법부식공예，실제제작료2×2광개관병진행료측시。측시결과표명，공작재1.55μm파단，당주입전류체도160mA시，완성료개관공능。
Aim at carrier injection type Mach-Zehnder Inferences optical switch, the output adjustable 3dB opti-cal coupler is introduced to compensate the absorption loss ofπphase shift by carrier injection and improve the cross-talk of the optical switch. The crosstalk induced by the absorption is calculated by using transfer matrix method, and the improved crosstalk due to the output adjustable 3dB coupler is calculated meanwhile. The results show that the adjustable 3dB coupler efficiently compensates the loss of the phase shift arm and improve the crosstalk of the opti-cal switch.