Spectral Characteristics of Square-Wave-Modulated Type II Long-Period Fiber Gratings Inscribed by a Femtosecond Laser

We study here the spectral characteristics of square-wave-modulated type II long-period fiber gratings (LPFGs) inscribed by a femtosecond laser. Both theoretical and experimental results indicate that higher-order harmonics refractive index (RI) modulation commonly exists together with the fundament...

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Detalhes bibliográficos

Principais autores:	Xiaofan Zhao, Hongye Li, Binyu Rao, Meng Wang, Baiyi Wu, Zefeng Wang
Formato:	Artigo
Idioma:	Inglês
Publicado em:	MDPI AG 2021-05-01
Colecção:	Sensors
Assuntos:	long-period fiber gratings higher-order harmonics femtosecond laser
Acesso em linha:	https://www.mdpi.com/1424-8220/21/9/3278
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