基于自相位调制效应的硅基中红外全光二极管

All-optical diode in mid-infrared waveband based on self-phase modulation effect in silicon ring resonator

信号单向导通器件是集成光学中一种重要的基本元件,而中红外波段在空间遥感,光谱分析等领域都有极其重要的应用.本文提出了一种由两个硅基微环谐振腔构成,基于自相位调制效应的硅基中红外全光二极管,并利用数值模拟的方法进行了分析.结果表明,在输入光强为0.5mW到20mW之间时,其非互易导通率可以大于20dB,且正向透过时损耗小于10dB.此外,本文还讨论了环形谐振腔中的线性吸收率,以及双稳态效应对结果的影响.

Nonreciprocal transmission device is one of the fundamental elements in integrated optics, and mid-infrared is a widely used waveband in many areas, such as remote sensing or spectrum analysis. An all-optical diode based on self-phase modulation （SPM） effect is numerically demonstrated in mid-infrared waveband. The diode consists of a linear waveguide and double silicon ring res- onators. The nonreciprocal transmission ratio can be more than 20 dB in a power range between 0.5 mW and 20 mW, while the transmission loss in forward direction is less than 10 dB. Moreover, the influences of linear absorption coefficient of ring resonators and the bi-stability effect on the performance of the diode are discussed.