This paper reports a method to enable, for the first time, reconfigurable control of resonance splitting of one or multiple arbitrarily selected azimuthal orders in a microring resonator. This is accomplished by inscribing Bragg gratings in photosensitive Ge₂₃Sb₇S₇₀ chalcogenide microring resonators via a novel cavity-enhanced photoinscription process, in which injection of light at the targeted C-band resonance frequency induces a spatially varying refractive index change. The so-formed Bragg grating precisely matches the selected resonance order without introducing optical losses. Long-term room temperature stability of the photoinscribed Bragg gratings has been verified in darkness and during operation with reduced optical power levels. The Bragg gratings can be reconfigured by first erasure with flood illumination of visible light at 561 nm and subsequent reinscription. We also report controlled splitting of multiple resonances by inscribing superimposed Bragg gratings.

中文翻译：

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硫族化物微环谐振器中的可重构频率选择谐振分裂

本文报道了一种方法，该方法首次使微环谐振器中的一个或多个任意选择的方位阶的谐振分裂的可重构控制成为可能。这是通过在感光Ge ₂₃ Sb ₇ S _70中刻写布拉格光栅来实现的硫族化物微环谐振器通过一种新型的腔增强光敏刻印工艺，其中以目标C波段谐振频率注入光会引起空间变化的折射率变化。如此形成的布拉格光栅精确匹配选定的谐振阶数，而不会引入光损耗。光敏布拉格光栅的长期室温稳定性已在黑暗中和在运行期间以降低的光功率水平得到了验证。布拉格光栅可通过首先用561 nm可见光的泛光照射擦除并随后重新刻写来重新配置。我们还报告了通过刻写叠加的布拉格光栅来控制多个共振的分裂。