摘要
首先制备了不同周期的染料掺杂全息液晶/聚合物光栅并进行激光抽运实验,得到了激光器的调谐曲线,确定了激光器在574 nm到685 nm的谱带里均可以实现激光输出,即激光器具有110 nm左右的可调谐范围.之后,通过温控仪控制样品的温度,对周期为610 nm的染料掺杂全息液晶/聚合物光栅进行激光抽运,探测不同温度下的输出激光光谱,观察到随着温度由20℃升高到65℃,激光器的中心波长由627.9 nm减小到623 nm,产生了4.9 nm的波长蓝移.
In this paper, we study the wavelength tunable properties for distributed-feedback lasing from 4-（dicyanomethylene）-2-methyl-6（4-dimethylaminostyryl）-4H-pyran （DCM） dye-doped holographic polymer dispersed liquid crystal grating. By preparing and pumping the DCM-doped HPDLC gratings with various grating spacings, we depict the tuning curve of the distributed-feedback lasing and confirm that only in a range from 574 nm to 685 nm, the lasing action can be observed. Then, we adjust the temperature of the sample and measure the lasing spectrum from the DCM-doped holographic polymer dispersed liquid crystal grating with a grating period of 610rim. There is an obvious 4.9 nm blueshift from 627.9 nm to 623 nm for the lasing wavelength with the temperature increasing from 20 °C to 65 °C.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第12期408-413,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60277033
50473040
19974046
59973020)资助的课题~~
关键词
全息液晶/聚合物光栅
分布反馈式激光器
调谐曲线
波长调谐特性
holographic polymer dispersed liquid crystal grating, distributed-feedback laser, tuning curve, wave-length tunable properties
