Mid-IR dual-wavelength difference frequency generation in uniform grating PPLN using index dispersion control

A novel widely tunable dual-wavelength mid-IR difference frequency generation （DFG） scheme with uniform grating periodically poled lithium niobate （PPLN） is presented in this paper. By using the temperature-dependent dispersion property of PPLN, the quasi-phase matching （QPM） peak for the pump may e...

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Published inChinese physics B Vol. 22; no. 12; pp. 268 - 271
Main Author 常建华 孙青 葛益娴 王婷婷 陶在红 张闯
Format Journal Article
LanguageEnglish
Published 01.12.2013
Subjects
Crystals
Dispersions
Evolution
Fiber lasers
Lasers
Light (visible radiation)
Lithium niobates
PPLN
Pumps
Wavelengths
中红外
光栅
分散控制
双波长
周期性极化铌酸锂
均匀
差频
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/12/124204

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Summary:A novel widely tunable dual-wavelength mid-IR difference frequency generation （DFG） scheme with uniform grating periodically poled lithium niobate （PPLN） is presented in this paper. By using the temperature-dependent dispersion property of PPLN, the quasi-phase matching （QPM） peak for the pump may evolve into two separate ones and the wavelength spacing between them increases with the decrease of the crystal temperature. Such two pump QPM peaks may allow simultaneous dual-wavelength mid-IR laser radiations while properly setting the two fundamental pump wavelengths. With this scheme, mid-IR dual-wavelength laser radiations at around 3.228 and 3.548, 3.114 and 3.661, and 3.019 and 3.76 μm, are experimentally achieved for the crystal temperatures of 90, 65, and 30 ℃, respectively, based on the fiber laser fundamental lights.
Bibliography:mid-IR difference frequency generation quasi-phase matching dual-wavelength
A novel widely tunable dual-wavelength mid-IR difference frequency generation （DFG） scheme with uniform grating periodically poled lithium niobate （PPLN） is presented in this paper. By using the temperature-dependent dispersion property of PPLN, the quasi-phase matching （QPM） peak for the pump may evolve into two separate ones and the wavelength spacing between them increases with the decrease of the crystal temperature. Such two pump QPM peaks may allow simultaneous dual-wavelength mid-IR laser radiations while properly setting the two fundamental pump wavelengths. With this scheme, mid-IR dual-wavelength laser radiations at around 3.228 and 3.548, 3.114 and 3.661, and 3.019 and 3.76 μm, are experimentally achieved for the crystal temperatures of 90, 65, and 30 ℃, respectively, based on the fiber laser fundamental lights.
11-5639/O4
Chang Jian-Huaa, Sun Qingb, Ge Yi-Xiana, Wang Ting-Tingb, Tao Zai-Honga, Zhang Chuanga （a Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing University of Information Science ＆ Technology, Nanjing 210044, China;b Optics Division, National Institute of Metrology, Beijing 100013, China ）
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SourceType-Scholarly Journals-1
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/12/124204