Spectrally programmable fiber microcavity laser with dye-doped liquid crystals
Spectrally programmable fiber microcavity laser with dye-doped liquid crystals
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DOI：
10.1016/j.optlastec.2022.108860
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发表时间：
2023-02
期刊：
影响因子：
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通讯作者：
Xiao-min Zhu;Zhengzhang He;H. Zhu;Weili Zhang
中科院分区：
文献类型：
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作者：
Xiao-min Zhu;Zhengzhang He;H. Zhu;Weili Zhang
激光共振模式的包络整形和波长调谐一直是一个有前途的话题，特别是在扩展微腔的功能方面，微腔是光约束和产生的流行平台。本文提出了一种具有光谱整形功能的散射辅助光纤微腔激光器。光纤微腔支撑具有灵活可控散射特性的液晶微柱，对增强激光发射和实现通过控制液晶分子的状态来定义可变光谱包络的低语走廊模式激光具有重要作用。结果表明，外场可以改变液晶的折射率和无序度，在电压和温度的作用下，低声走廊模式激光器的谐振波长呈现相反的调谐规律。此外，利用图案化电压控制，实现了光谱可定义的混合激光发射，为光谱可编程软材料激光器的研究奠定了坚实的基础。
Envelope shaping and wavelength tuning for resonance modes of lasers have always been promising topics, especially, in extending the functionalities of microcavities which are popular platforms for light confinement and generation. In this paper, a scattering-assisted fiber microcavity laser is proposed with function of spectral shaping. The fiber microcavity supports a liquid crystal micropillar with flexibly controllable scattering, which plays an important role to enhance the laser emission and enable whispering-gallery-mode lasing with variable spectral envelope that is defined by controlling the state of liquid crystal molecules. Our results show that external fields can change refractive index and disorder of the liquid crystal, and the resonant wavelengths of the whispering-gallery-mode laser exhibit opposite tuning regularity under the action of voltage and temperature. Moreover, using a patterned voltage control, spectrally definable hybrid laser emission is realized, laying a solid foundation for the research of spectral programmable soft-materials based lasers.