Lasing in cholesteric liquid crystal cells: Competition of Bragg and leaky modes
Lasing in cholesteric liquid crystal cells: Competition of Bragg and leaky modes
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胆甾型液晶单元中的激光发射：布拉格模式和泄漏模式的竞争
DOI：
10.1063/1.2437104
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发表时间：
2007
影响因子：
3.2
通讯作者：
V. Lazarev
中科院分区：
文献类型：
--
作者：
L. Blinov;G. Cipparrone;A. Mazzulla;P. Pagliusi;V. Lazarev
本文测量了染料掺杂的双折射液晶（CLC）平面层的发光光谱和激光光谱的角度依赖性。除了已知的布拉格发射模式传播沿着细胞正常，我们观察到，泄漏模式也依赖于泵浦强度和尺寸和形状的激发光束的横截面。漏模作为一种特殊的激光模式是有价值的，但对布拉格激光模式的能量施加了严重的限制。在设计基于CLC的高能激光器件时，必须考虑到这一点。
Measurements of the angular dependency of luminescence and lasing spectra were carried out for a planar layer of a dye-doped cholesteric liquid crystal (CLC). In addition to the known Bragg emission mode propagating along the cell normal, we observed that leaky modes also depend on the pump intensity and on the dimension and shape of the transverse cross section of the excitation beam. The leaky modes are valuable as a specific lasing regime but impose serious limitation on the energy of the Bragg lasing modes. This has to be taken into consideration when designing high energy lasing devices based on CLC.