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

doi:10.1088/1674-1056/22/12/124204

Abstract 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.

Keywords: mid-IR difference frequency generation quasi-phase matching dual-wavelength

Received: 27 August 2013
Revised: 18 September 2013
Accepted manuscript online:

PACS:	42.55.Wd	(Fiber lasers)
	42.60.-v	(Laser optical systems: design and operation)
	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)
	42.72.Ai	(Infrared sources)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11374161), the Open Research Project of Jiangsu Provincial Key Laboratory of Meteorological Observation and Information Processing, China (Grant No. KDXS1206), and the Project Funded by the Priority Academic Program Development of Jiangsu Provincial Higher Education Institutions, China.

Corresponding Authors: Chang Jian-Hua
E-mail: jianhuachang@nuist.edu.cn

Cite this article:

Chang Jian-Hua (常建华), Sun Qing (孙青), Ge Yi-Xian (葛益娴), Wang Ting-Ting (王婷婷), Tao Zai-Hong (陶在红), Zhang Chuang (张闯) Mid-IR dual-wavelength difference frequency generation in uniform grating PPLN using index dispersion control 2013 Chin. Phys. B 22 124204

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

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