Photonics Research, 2017, 5 (6): 06000669, Published Online: Dec. 7, 2017  

Frequency-domain parametric downconversion for efficient broadened idler generation Download: 506次

Author Affiliations
International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology of Ministry of Education, Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Abstract
An opposite-chirped frequency-domain optical parametric amplification (OC-FOPA) design is demonstrated and numerically verified. This scheme combines both an ultrabroad seeding generation and the subsequent effective amplification in one single optical parametric amplification stage. Based on a slightly asymmetrical 4-f optical system, the spectral contents of both pump and signal waves are spectrally dispersed with opposite spatial chirps, to broaden the initial idler seeding. Via a properly designed fan-out periodically poled LiNbO3 chip, nearly perfect quasi phase matching can be realized across the full spectrum, whereby each individual spectral pair precisely maps to its required grating period. Full-dimensional simulations based on commercial ~110 fs (FWHM) near-infrared (near-IR) lasers at 790 and 1030 nm are quantitatively discussed, and few-cycle mid-IR laser pulses (~60 fs at 3.4 μm) plus a high conversion efficiency exceeding 50% are theoretically predicted. By means of a high-power pump source, the OC-FOPA scheme can be also applied to directly produce high-intensity carrier-envelope-phase-stabilized mid-IR idler pulses.

Ying Li, Yuhai Liang, Dahua Dai, Jianlong Yang, Haizhe Zhong, Dianyuan Fan. Frequency-domain parametric downconversion for efficient broadened idler generation[J]. Photonics Research, 2017, 5(6): 06000669.

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