一种低阈值、高效率的微流控波导激光器。

A low-threshold, high-efficiency microfluidic waveguide laser.

作者信息

Vezenov Dmitri V, Mayers Brian T, Conroy Richard S, Whitesides George M, Snee Preston T, Chan Yinthai, Nocera Daniel G, Bawendi Moungi G

机构信息

Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.

出版信息

J Am Chem Soc. 2005 Jun 29;127(25):8952-3. doi: 10.1021/ja0517421.

DOI:10.1021/ja0517421

PMID:15969563

Abstract

This communication describes a long (1 cm), laser-pumped, liquid core-liquid cladding (L2) waveguide laser. This device provides a simple, high intensity, tunable light source for microfludic applications. Using a core solution of 2 mM rhodamine 640 perchlorate, optically pumped by a frequency-doubled Nd:YAG laser, we found that the threshold for lasing was as low as 22 muJ (16-ns pulse length) and had a slope efficiency up to 20%. The output wavelength was tunable over a 20-nm range by changing the ratio of solvent components (dimethyl sulfoxide and methanol) in the liquid core.

摘要

本通讯介绍了一种长1厘米的激光泵浦液芯-液包层（L2）波导激光器。该装置为微流控应用提供了一种简单、高强度、可调谐的光源。使用含有2 mM高氯酸罗丹明640的芯溶液，由倍频Nd:YAG激光器进行光泵浦，我们发现激光发射阈值低至22 μJ（脉冲长度16 ns），斜率效率高达20%。通过改变液芯中溶剂成分（二甲基亚砜和甲醇）的比例，输出波长可在20纳米范围内调谐。