Fabrication of cascaded wideband LPFGs by CO2 laser and Raman suppression in a 5 kW one-stage MOPA fiber laser

被引：7

作者：

Hu, Qihao ^{[1
,2
]}

Tian, Xin ^{[1
,2
]}

Zhao, Xiaofan ^{[1
,3
]}

Wang, Meng ^{[1
,2
,3
]}

Xi, Xiaoming ^{[1
,2
,3
]}

Wang, Zefeng ^{[1
,2
,3
]}

Xu, Xiaojun ^{[1
,2
,3
]}

机构：

[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China

[2] State Key Lab Pulsed Power Laser Technol, Changsha 410073, Peoples R China

[3] Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2022年 / 150卷

基金：

中国国家自然科学基金;

关键词：

Fiber laser; Long period fiber grating; Stimulate Raman scattering; BRAGG GRATINGS; SCATTERING; GAIN;

D O I：

10.1016/j.optlastec.2022.107984

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Long period fiber Bragg grating (LPFG) has been proved to be an effective component for stimulated Raman scattering (SRS) suppression in high power fiber lasers. The rejection bandwidth has significant influence on the Raman suppression effect, usually the wider the better. In this paper, a simple cascaded inscription method for achieving wideband LPFGs, to the best of our knowledge, is proposed and experimentally validated for the first time. The influence of grating periods on the transmission spectrum was simulated, and then a wideband cascaded LPFG was designed and fabricated by CO2 laser. To test its performance, a 5-kW level oscillator onestage power amplification fiber laser was established and several comparative experiments were done. The validity of the cascaded LPFG has been demonstrated by the better Raman suppression effect. This work provides a simple and effective method for obtaining wideband LPFGs, which have many other applications besides Raman suppression, such as mode conversion in fiber lasers.

引用

页数：6

共 32 条

[1]

Agrawal GP, 2013, 2013 OPTICAL FIBER COMMUNICATION CONFERENCE AND EXPOSITION AND THE NATIONAL FIBER OPTIC ENGINEERS CONFERENCE (OFC/NFOEC)

[2] Influence of a backward reflection on low-threshold mode instability in Yb3+-doped few-mode fiber amplifiers [J].

Antipov, Oleg ;

Kuznetsov, Maxim ;

Alekseev, Dmitriy ;

Tyrtyshnyy, Valentin .

OPTICS EXPRESS, 2016, 24 (13) :14871-14879

[3] Long-period fibre grating fabrication with focused CO2 laser pulses [J].

Davis, DD ;

Gaylord, TK ;

Glytsis, EN ;

Kosinski, SG ;

Mettler, SC ;

Vengsarkar, AM .

ELECTRONICS LETTERS, 1998, 34 (03) :302-303

[4]

Dianov E. M., P EUR C OPT COMM, P65

[5] Cladding-mode resonances in short- and long-period fiber grating filters [J].

Erdogan, T .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1997, 14 (08) :1760-1773

[6] Distributed suppression of stimulated Raman scattering in an Yb-doped filter-fiber amplifier [J].

Fini, J. M. ;

Mermelstein, M. D. ;

Yan, M. E. ;

Bise, R. T. ;

Yablon, A. D. ;

Wisk, P. W. ;

Andrejco, M. J. .

OPTICS LETTERS, 2006, 31 (17) :2550-2552

[7]

Heck M., P SPIE, V10512

[8] Raman suppression in 5 kW fiber amplifier using long period fiber grating fabricated by CO2 laser [J].

Hu, Qihao ;

Zhao, Xiaofan ;

Tian, Xin ;

Li, Hongye ;

Wang, Meng ;

Wang, Zefeng ;

Xu, Xiaojun .

OPTICS AND LASER TECHNOLOGY, 2022, 145

[9] Modeling the inhibition of stimulated Raman scattering in passive and active fibers by lumped spectral filters in high power fiber laser systems [J].

Jansen, Florian ;

Nodop, Dirk ;

Jauregui, Cesar ;

Limpert, Jens ;

Tuennermann, Andreas .

OPTICS EXPRESS, 2009, 17 (18) :16255-16265

[10] High-power fibre lasers [J].

Jauregui, Cesar ;

Limpert, Jens ;

Tuennermann, Andreas .

NATURE PHOTONICS, 2013, 7 (11) :861-867

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