Pumping scheme dependent multimode laser emission from free-standing cylindrical microcavity

被引：7
|
作者：
Peter, Jaison [1 ]
Saleem, Rasool [1 ]
Sebastian, Ananthu [1 ]
Radhakkrishnan, P. [1 ]
Nampoori, V. P. N. [1 ]
Girijavallabhan, C. P. [1 ]
Kailasnath, M. [1 ]
机构：
[1] Cochin Univ Sci & Technol, Int Sch Photon, Cochin 682022, Kerala, India
来源：
OPTICS COMMUNICATIONS | 2014年 / 320卷
关键词：
Microring cavity; Red-shift; Blue-shift; WGMs;
D O I：
10.1016/j.optcom.2014.01.054
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the observation of multimode laser emission from a free-standing microring cavity based on rhodamine 6G dye doped hollow poly(methyl methacrylate) optical fiber (DDHPOF) obtained by pulsed photo-excitation. Two different pumping schemes were employed to characterize DDHPOF; the stripe illumination and the spot illumination. By using spot illumination, the slope efficiency of system is enhanced by more than 3 times than that of the stripe illumination and also a red-shift in emission spectrum is observed with the pump power. When the pump power is increased beyond the threshold value, laser emission occurs with a multimode structure. From the relation between mode spacing and diameter of cylindrical cavity, the lasing action is considered to be formed by whispering gallery modes (WGMs). (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：125 / 128
页数：4
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