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1.天津大学 理学院, 天津 300072
2.南方科技大学 电子与电气工程系, 广东 深圳 518055
[ "王东硕(1994—),男,河北唐山人,硕士研究生,2019年于天津大学获得硕士学位,主要从事液晶激光方面的研究。E-mail:wangdongshuo16@tju.edu.cn" ]
[ "戴海涛(1977—),男,河南焦作人,博士后,教授,2005年于复旦大学获得博士学位,主要从事液晶光电子器件(柔性液晶激光,快速液晶开关器件以及液晶光场调控器件);能源光子学(包括光催化分解水,新型固态发光和太阳能电池器件);光学超材料和超表面特性等方面的研究。E-mail: htdai@tju.edu.cn" ]
收稿日期:2019-05-21,
录用日期:2019-6-13,
纸质出版日期:2019-10-05
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王东硕, 陈茂洲, 戴海涛, 等. 光调控的偶氮染料掺杂聚合物分散液晶微管随机激光器[J]. 液晶与显示, 2019,34(10):935-944.
Dong-shuo WANG, Mao-zhou CHEN, Hai-tao DAI, et al. Optically tunable random lasing from azo-dye-doped polymer dispersed liquid crystal in capillary tubes[J]. Chinese journal of liquid crystals and displays, 2019, 34(10): 935-944.
王东硕, 陈茂洲, 戴海涛, 等. 光调控的偶氮染料掺杂聚合物分散液晶微管随机激光器[J]. 液晶与显示, 2019,34(10):935-944. DOI: 10.3788/YJYXS20193410.0935.
Dong-shuo WANG, Mao-zhou CHEN, Hai-tao DAI, et al. Optically tunable random lasing from azo-dye-doped polymer dispersed liquid crystal in capillary tubes[J]. Chinese journal of liquid crystals and displays, 2019, 34(10): 935-944. DOI: 10.3788/YJYXS20193410.0935.
为了优化液晶类微管激光器的性能,本文研究了偶氮染料掺杂聚合物分散液晶微管激光器出射激光的性能及光控性。通过在不同纤芯直径的玻璃毛细管中制备掺杂偶氮染料的PDLC,并分别测量这些样品的随机激光阈值。增加紫外线照射强度,测量随机激光的光谱。实验结果表明,不同芯径毛细管样品(100
μ
m,300
μ
m,500
μ
m)的随机激光阈值测量为11.8
μ
J/脉冲,8.6
μ
J/脉冲和13.2
μ
J/脉冲。实验结果还表明,随着紫外线照射强度的增加(从0 mW/cm
2
增加到150 mW/cm
2
),随机激光强度逐渐减小,光谱的半高宽变宽。随机激光在光学调谐过程中在不同偏振方向的紫外光束下显示出相似的特性。该工作验证了在圆柱形约束结构中制造微型激光器件的可能性,并扩展了PDLC的应用范围。
This study demonstrated the optically tunable random lasing from azo-dye-doped polymer dispersed liquid crystal (PDLC) in capillary tubes
in order to expand new applications for this device. The azo-dye-doped PDLC was prepared in glass capillaries with different core diameters
and the random lasing thresholds of these samples were measured respectively. The spectra of random lasers were measured with increasing the intensity of ultraviolet radiation. The experimental results show that the random laser threshold measurements of different core diameter capillary samples (100
μ
m
300
μ
m
500
μ
m) are 11.8
μ
J/pulse
8.6
μ
J/pulse and 13.2
μ
J/pulse. The experimental results also show that as the intensity of ultraviolet radiation increases (from 0 mW/cm
2
to 150 mW/cm
2
)
the random laser intensity decreases gradually
and the FWHM of the spectrum becomes wider. And the random lasing showed similar properties under the UV beam with different polarized directions during the optical tuning process. Our work verifies the possibility to fabricate miniature laser devices in cylindrical confinement structures
and extends the application scope of PDLC.
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