物理学报Issue(19)：1-6,6.DOI:10.7498/aps.63.194202
基于聚合物支撑形貌液晶/聚合物光栅的低阈值分布反馈式激光器
Low threshold distributed feedback laser based on scaffolding morphologic and holographic p olymer disp ersed liquid crystal gratings
摘要
Abstract
We have made a low scattering holographic polymer dispersed liquid crystal (HPDLC) transmission grating with polymer scaffolding morphology, which was fabricated under the condition of low curing intensity and no liquid crys-tal droplet. We studied the amplified spontaneous emission (ASE) thresholds and relative intensities of PM567(4, 4-difluoro-1, 3, 5, 7, 8-pentamethyl-2, 6-diethyl-4-bora-3a, 4a-diaza-s-indacene), DCM (4-Dicyanomethylene-2-methyl-6-p-dimethylaminostyryl-4H-pyran), and DCJTI(4-dicyanomethylene)-2-isopropyl-6-(1, 1, 7, 7-tetramethylzulolidyl-9-enyl)-4H-pyran). It is shown that the dye DCJTI has the best properties of ASE, the lowest threshold and the highest relative intensity among the three dyes. Results suggest that DCJIT is a promising material for low threshold, high slope efficiency lasers. Each dye was doped in HPDLC grating with polymer scaffolding morphology individually, and lasers with different wavelengths can be obtained by changing the period of the gratings. The excellent laser property is obtained from the DCJIT-doped laser. A spectral linewidth of 0.3 nm is observed at pump energy threshold 0.65 J/pulse and a conversion efficiency of 1.6%is achieved at the operating wavelength 635 nm. The laser performance is improved in some aspects such as threshold energy, conversion efficiency, and linewidth to some extent as compared with those reported previously.关键词
液晶/聚合物光栅/分布反馈激光器/低阈值Key words
polymer dispersed liquid crystal grating/distributed feedback laser/low threshold引用本文复制引用
刘丽娟,黄文彬,刁志辉,张桂洋,彭增辉,刘永刚,宣丽..基于聚合物支撑形貌液晶/聚合物光栅的低阈值分布反馈式激光器[J].物理学报,2014,(19):1-6,6.基金项目
国家自然科学基金(批准号:11174274,11174279,61205021,11204299,61378075,61377032)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant Nos.11174274,11174279,61205021,11204299,61378075,61377032) （批准号:11174274,11174279,61205021,11204299,61378075,61377032）
