长波长垂直腔面发射激光器开关及双稳特性

为了研究垂直腔面发射激光器偏振转换特性,基于自旋反转模型,数值研究了正交光注入下1550nm垂直腔面发射激光器频率诱导偏振开关及双稳特性。结果表明,在正交光注入下,连续改变注入光与激光器光场内x线性极化模的频率失谐可诱导产生两类偏振开关和偏振双稳现象,且注入光强与偏振电流的变化都显著影响双稳宽度和激光器的输出特性;合理选择操作条件,可实现对1550nm垂直腔面发射激光器频率诱导偏振开关及双稳的控制。这一结果对垂直腔面发射激光器在全光开关和全光存储等领域的应用具有参考价值。

Polarization switch and bistability in long-wavelength vertical-cavity surface-emitting lasers

To study the polarized conversion characteristics of vertical cavity surface emitting lasers (VCSEL), frequency-induced polarization switching (PS) and polarization bistability (PB) of 1550nm VCSEL subject to orthogonal optical injection were investigated numerically by adopting extended spin-flip model. The results show that under orthogonal optical injection, PS and PB can be achieved through varying the frequency detuning between the injected field and the x linearly polarized mode in VCSEL consecutively. Furthermore, the variation of injection power and bias current have strong effects on PB width and VCSEL output emission. The controlling of frequency-induced PS and PB in a 1550nm VCSEL can be realized with appropriate selection of operating conditions. This study has reference value for the application of VCSEL in all-optical switching and all-optical memory.