A femtosecond pulse fiber laser at 1935 nm using a bulk-structured Bi2Te3 topological insulator

被引：268

作者：

Jung, Minwan ^{[1
,3
]}

Lee, Junsu ^{[1
]}

Koo, Joonhoi ^{[1
]}

Park, Jaehyun ^{[2
]}

Song, Yong-Won ^{[2
]}

Lee, Kwanil ^{[3
]}

Lee, Sangbae ^{[3
]}

Lee, Ju Han ^{[1
]}

机构：

[1] Univ Seoul, Sch Elect & Comp Engn, Seoul 130743, South Korea

[2] Korea Inst Sci & Technol, Future Convergence Res Div, Seoul 136791, South Korea

[3] Korea Inst Sci & Technol, Inst Multidisciplinary Convergence Matter, Seoul 136791, South Korea

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

MU-M; SATURABLE ABSORBER; CARBON NANOTUBE; MODE-LOCKING; GRAPHENE; STATE; EXFOLIATION; BI2SE3;

D O I：

10.1364/OE.22.007865

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally demonstrate a femtosecond mode-locked, all-fiberized laser that operates in the 2 mu m region and that incorporates a saturable absorber based on a bulk-structured bismuth telluride (Bi2Te3) topological insulator (TI). Our fiberized saturable absorber was prepared by depositing a mechanically exfoliated, similar to 30 mu m-thick Bi2Te3 TI layer on a side-polished optical fiber platform. The bulk crystalline structure of the prepared Bi2Te3 layer was confirmed by Raman and X-ray photoelectron spectroscopy measurements. The modulation depth of the prepared saturable absorber was measured to be similar to 20.6%. Using the saturable absorber, it is shown that stable, ultrafast pulses with a temporal width of similar to 795 fs could readily be generated at a wavelength of 1935 nm from a thulium/holmium co-doped fiber ring cavity. This experimental demonstration confirms that bulk structured, TI-based saturable absorbers can readily be used as an ultra-fast mode-locker for 2 mu m lasers. (C) 2014 Optical Society of America

引用

页码：7865 / 7874

页数：10

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