Long period fibre gratings inscribed by sinusoidal intensity modulated femtosecond laser

被引：1

作者：

Zhao, Xiaofan ^{[1
,3
]}

Li, Hongye ^{[1
,2
]}

Rao, Binyu ^{[1
,3
]}

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

Wu, Baiyi ^{[1
,2
,3
]}

Wang, Zefeng ^{[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：

JOURNAL OF OPTICS | 2022年 / 24卷 / 01期

基金：

中国国家自然科学基金;

关键词：

long period fibre gratings; femtosecond laser; direct inscription; low insertion loss; FABRICATION;

D O I：

10.1088/2040-8986/ac3c30

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

To the best of our knowledge, this is the first study to propose and verify a novel and simple direct inscription method for long-period fibre gratings (LPFGs) with an arbitrary grating period using a sinusoidal intensity modulated femtosecond laser. This method induces a sine refractive index modulation, which makes the LPFGs have no higher-order harmonic resonance that exists in the normal square-wave modulation method. This is beneficial for reducing the insertion loss of the LPFGs and optimising the transmission spectrum. Using this method, we also conveniently realise the inscription of superimposed, apodised, and chirped LPFGs. This work presents a simple but effective inscription scheme for various types of LPFGs using a femtosecond laser.

引用

页数：6

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