Second harmonic generation by femtosecond Yb-doped fiber laser source based on PPKTP waveguide fabricated by femtosecond laser direct writing

被引：10

作者：

Tu, Chenghou ^{[1
,2
]}

Huang, Zhangchao ^{[1
,2
]}

Zhang, Shuanggen ^{[1
,2
]}

Hu, Minglie ^{[3
]}

Wang, Qingyue ^{[3
]}

Li, Enbang ^{[3
]}

Li, Yongnan ^{[1
,2
]}

Lu, Fuyun ^{[1
,2
]}

机构：

[1] Nankai Univ, Sch Phys, Minist Educ, Tianjin 300071, Peoples R China

[2] Nankai Univ, Key Lab Weak Light Nonlinear Photon, Minist Educ, Tianjin 300071, Peoples R China

[3] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2011年 / 284卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Second harmonic generation; Femtosecond; Fiber laser; PPKTP waveguide; Femtosecond laser direct writing; POTASSIUM TITANYL PHOSPHATE; BLUE-LIGHT; PULSES; KTIOPO4; KTP; NONLINEARITY; CRYSTAL;

D O I：

10.1016/j.optcom.2010.09.022

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The frequency doubling of femtosecond pulses from an Yb-doped fiber laser source was demonstrated in a PPKTP waveguide fabricated by femtosecond laser direct writing. The PPKTP waveguide contains a fixed period of 8.9 mu m and the feomtosecond fundamental pulses have a central wavelength of 1044 nm. A maximum SHG power of 406 mW was produced, yielding a conversion efficiency of 5.6%. Numerical simulations were carried out to investigate the property of frequency doubling for femtosecond pulses. The results show that the SHG process proceeds even the quasi-phase-matching (QPM) condition is not well satisfied, which is significantly different from that of "long" pulses or CW light and is accorded with the experimental results. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：455 / 459

页数：5

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