Zhou Yinli, Jia Yuchen, Zhang Xing, Zhang Jianwei, Liu Zhanchao, Ning Yongqiang, Wang Lijun
Opt Express. 2022 Mar 14;30(6):8991-8999. doi: 10.1364/OE.450118.
Transverse optical confinement in oxide-confined vertical-cavity surface-emitting lasers (VCSELs) crucially depends on thickness of oxide layer and its position relative to a standing wave. Modifying the structure reduces the overlap between the oxide layer and the standing wave as well as effective refractive index difference between core and cladding of the VCSEL that subsequently decreases of the number of transverse modes and increases the mode extension beyond oxide aperture. A 795 nm VCSEL is designed and fabricated with this concept. The proposed device achieves high single-mode operation of 4.1 mW at 80 °C, SMSR of 41.68 dB, and OPSR of 27.4 dB. VCSEL is applied in a nuclear magnetic resonance gyroscope (NMRG) system as pump source due to its excellent device performance and satisfactory test results are obtained.
氧化物限制垂直腔面发射激光器（VCSEL）中的横向光限制关键取决于氧化层的厚度及其相对于驻波的位置。修改结构会减少氧化层与驻波之间的重叠，以及VCSEL纤芯与包层之间的有效折射率差，这随后会减少横向模式的数量，并增加模式在氧化孔径之外的扩展。基于这一概念设计并制造了一个795 nm的VCSEL。所提出的器件在80°C时实现了4.1 mW的高单模工作，边模抑制比（SMSR）为41.68 dB，光隔离比（OPSR）为27.4 dB。由于其优异的器件性能，VCSEL被应用于核磁共振陀螺仪（NMRG）系统作为泵浦源，并获得了令人满意的测试结果。
