Frequency red shift induced by the enhancement of asymmetric absorption of saturable absorber in a Yb-doped mode-locked fiber laser

被引：0

作者：

Ou, Shangming ^{[1
]}

Sui, Qinglin ^{[2
]}

Ma, Menglong ^{[2
]}

Zhang, Qingmao ^{[2
]}

Guo, Liang ^{[2
]}

Zhang, Nan ^{[3
]}

Liu, Huanhuan ^{[1
]}

Shum, Perry Ping ^{[1
,4
]}

机构：

[1] Southern Univ Sci & Technol, Coll Engn, Dept Elect & Elect Engn, 1088 Xueyuan Ave, Shenzhen 518110, Peoples R China

[2] South China Normal Univ, Sch Informat & Optoelect Sci & Engn, Guangdong Prov Key Lab Nanophoton Funct Mat & Devi, Guangzhou 510006, Peoples R China

[3] Shenzhen JPT Optoelect Co Ltd, Shenzhen 518110, Peoples R China

[4] Pengcheng Lab, Shenzhen 518055, Peoples R China

来源：

OPTICAL FIBER TECHNOLOGY | 2023年 / 80卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Spectral shift; Saturable absorber; Pulse shaping; Mode-locked laser; High repetition rate; REPETITION RATE; RECOVERY-TIME; GENERATION; LOCKING; IMPACT;

D O I：

10.1016/j.yofte.2023.103421

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The mechanism of frequency red shift from gain spectral center is revealed in a SESAM mode-locked Yb-doped fiber laser for the first time as far as we know, which is due to the asymmetric absorption of SESAM. The phenomenon is demonstrated by numerical simulations and confirmed by experimental results, which is attributed to a greater loss of the frequency components in the temporal rising edge, as a consequence pulses become asymmetric. With the balance between the asymmetric absorption of SESAM and the pulling effect of gain spectral center, pulses in the laser are able to be stabilized and the spectra are ultimately red shifted. The increase of temporal asymmetry, as well as the enhancement of frequency red shift as results of the increase of saturation energy are also demonstrated.

引用

页数：7

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