Tilted fiber Bragg grating fixed in a polypropylene tube for ultrasonic sensing and imaging of simulated geological models

Gang, Tingting; Zhang, Xuan; Sun, Ruijuan

doi:10.1016/j.optlastec.2021.107075

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“…With the maturity of fiber grating inscription technology in recent years, it has been widely used in fiber optic communication [17,18] and fiber sensing [19][20][21], especially in the flatness of the gain and ASE suppression [22][23][24]. The TFBG is selected for the required flattening requirements and existing conditions.…”

Section: Introductionmentioning

confidence: 99%

Broadband, Continuous-Wave, Mid-Infrared Generation Based on TFBG Spectral Modulation

Wang

et al. 2022

IEEE Photonics J.

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We demonstrated a tilted fiber Bragg grating (TFBG)-based modulated amplified spontaneous emission (ASE) source, followed by the broadband, continuous-wave (CW) mid-infrared laser generated by intracavity difference-frequency generation (DFG). By flattening the spectrum of the ASE source during its power amplification and injecting another 1018 nm fiber laser in the optical parametric oscillation(OPO) cavity, nonlinear frequency conversion was achieved in the nonlinear crystal. By tuning the polarization period of the crystal, a three-peaked mid-infrared laser with a full width at half maximum (FWHM) of 130 nm and a four-peaked mid-infrared laser with an FWHM of 180 nm was generated.

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