title: Mid-IR multiwavelength difference frequency generation based on fiber lasers.
abstract: A mid-IR multiwavelength difference frequency generation (DFG) laser source with fiber laser fundamental lights is demonstrated by using the dispersion property of PPLN to broaden the quasi-phase-matching (QPM) acceptance bandwidth (BW). Our results show that the QPM BW for the pump YDFL is much larger than that for the signal EDFL. Using a multiwavelength YDFL and a single-wavelength EDFL as the pump and the signal lights, the DFG laser source can simultaneously emit 14 mid-IR wavelengths with the spacing of 14 nm at a fixed PPLN temperature. Moreover, mid-IR multiwavelength lasing lines can be synchronously tuned between 3.28 and 3.47 microm.
authors.affiliation: Anhui provincial Key Lab of Photonics Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, China
authors.forename: Jian
authors.initials: J
authors.lastname: Jiang
authors.forename: Jianhua
authors.initials: J
authors.lastname: Chang
authors.forename: Sujuan
authors.initials: S
authors.lastname: Feng
authors.forename: Li
authors.initials: L
authors.lastname: Wei
authors.forename: Qinghe
authors.initials: Q
authors.lastname: Mao