Reduced-Threshold Emission of Capillary Filled by Doped-Dye Cholesteric Liquid Crystals With Photo-Alignment Polyimide Films

A microcavity laser is reported using dye-doped cholesteric liquid crystals (CLCs) filled in a glass capillary with photo-alignment polyimide films. This laser runs based on the properties that a CLC has a refractive index much higher than that of glass, so whispering-gallery-mode (WGM) laser and di...

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Veröffentlicht in:	IEEE photonics journal 2018-02, Vol.10 (1), p.1-7
Hauptverfasser:	Lu, Yue-Lan, Yin, Xiang-Bao, Xiong, Zuo-Ren, Yang, Yue, Sun, Wei-Min, Liu, Yong-Jun
Format:	Artikel
Sprache:	eng
Schlagworte:	dye laser Glass Laser excitation Laser modes Liquid crystal Liquid crystals Pump lasers tunable laser whispering gallery mode
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Zusammenfassung:	A microcavity laser is reported using dye-doped cholesteric liquid crystals (CLCs) filled in a glass capillary with photo-alignment polyimide films. This laser runs based on the properties that a CLC has a refractive index much higher than that of glass, so whispering-gallery-mode (WGM) laser and distributed-feedback-mode lasers are included in the emission spectrum. We obtain a low threshold energy of 4.5 μJ · pulse -1 · mm -2 , establish the shift of 3.04 nm of the WGMs in the temperature range 43-48 °C, and investigate electric field tunability.
ISSN:	1943-0655 1943-0647
DOI:	10.1109/JPHOT.2018.2795106