Tailoring of random lasing characteristics in dye-doped nematic liquid crystals |
| |
| Authors: | Lihua Ye Cong Hou Changgui Lv Chong Zhao Zhile Yin Yiping Cui Yanqing Lu |
| |
| Institution: | 1. Advanced Photonics Center, School of Electronic Science and Technology, Southeast University, Nanjing, 210096, People’s Republic of China
2. National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, People’s Republic of China
|
| |
| Abstract: | Amplified spontaneous emission and random lasing are investigated in random systems with dye-doped nematic liquid crystals. And that temporal stability of random lasing is analyzed. The influence of pumping polarization as well as the multiple scattering and reflection between boundaries on the emission behavior and the formation of coherent feedback is investigated in detail. For freely suspended samples, certain emission wavelength can be obtained by changing the pump wavelength. This feature is useful in making wavelength-tunable lasers. Moreover, as the pumping thickness of wedge sample increases, the emission spectrum is red shifted and the average spacing of adjacent spikes decreases. This property can be applied in laser mode selection, i.e., the number of modes within certain wavelength range can be chosen. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
