有机材料EnBOD的放大自发发射性能研究

Study on Amplified Spontaneous Emission Properties of En BOD Material

在紫外脉冲激光泵浦条件下,研究了有机材料En BOD的放大自发发射(ASE)性能。En BOD的甲苯稀溶液样品具有较窄的吸收和荧光光谱,主峰分别位于508 nm和527 nm。其ASE效率随着溶液浓度而变化,浓度为0.008 mol·L-1的En BOD样品具有最高的ASE效率,达到22.6%。其ASE主峰位于542 nm,阈值约为29.5 k W·cm-2。阈值后的ASE半宽约为12.4 nm。经紫外脉冲激光20万次泵浦后,ASE的光强衰减为初始强度的61.2%。结果表明En BOD是一种ASE阈值较低、光稳定性良好的激光材料。

Amplified spontaneous emission( ASE) properties of organic material En BOD were studied under ultraviolet pulse laser pumping. En BOD sample in dilute toluene solution shows narrowband absorption and PL spectra,with the maximum peak located at 508 nm and 527 nm,respectively.The ASE efficiency changes with the solution concentration. The maximum ASE efficiency of 22. 6%was obtained when the En BOD sample concentration is 0. 008 mol·L- 1,in which the ASE threshold is 29. 5 k W·cm- 2,ASE peak is 542 nm and full width at half maximum is about 12. 4 nm.The ASE output intensity attenuated to 61. 2% of the initial strength under the pulse pump frequency of 200 000. The results indicated that En BOD is a kind of laser material with low ASE threshold and good light stability.