Femtosecond-irradiation-induced refractive-index changes and channel waveguiding in bulk Ti3+:Sapphire

被引：100

作者：

Apostolopoulos, V ^{[1
]}

Laversenne, L

Colomb, T

Depeursinge, C

Salathé, RP

Pollnau, M

Osellame, R

Cerullo, G

Laporta, P

机构：

[1] Swiss Fed Inst Technol, Inst Imaging & Appl Opt, Adv Photon Lab, CH-1015 Lausanne, Switzerland

[2] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy

[3] CNR, IFN, I-20133 Milan, Italy

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 07期

关键词：

D O I：

10.1063/1.1781737

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have employed femtosecond laser writing in order to induce refractive-index changes and waveguides in Ti3+-doped sapphire. Doping the sapphire crystal with an appropriate ion significantly reduces the threshold for creating structural changes, thus enabling the writing of waveguide structures. Passive and active buried channel waveguiding is demonstrated and images of the guided modes, propagation-loss values, fluorescence spectra, and output efficiencies are presented. The guiding area is located around the laser-damaged region, indicating that the guiding effect is stress induced. Refractive-index changes are measured by digital holography. Proper active doping should enable femtosecond processing and waveguide writing in various crystalline materials. (C) 2004 American Institute of Physics.

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页码：1122 / 1124

页数：3

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