Chinese Optics Letters, Volume. 20, Issue 1, 010602(2022)
Spectrally U-shaped profile of beam propagation factor in all-solid photonic bandgap fiber
Fig. 1. Relative losses of the 5-m-length fiber. Inset shows the cross section of our multi-resonant fiber.
Fig. 2. Experimental configurations constructed for (a) M2 and (b) S2 measurements, respectively. SMF, single-mode fiber; FUT, AS-PBGF under test; L, L1, and L2, aspherical lens; M1 and M2, reflective mirror; BQA, beam quality analysis; ASE source, amplified spontaneous emission source; PBS, polarizing beam splitter; CF, collecting fiber; OSA, optical spectrum analyzer.
Fig. 3. Measured M2 results under different wavelengths. (a) The U-shaped curve covering the third PBG and (b) partial magnification of the results in the SAE region.
Fig. 4. S2 data analysis within the NB and LAE regions with a 5-m-length fiber when the coiled diameter Φ = 80 cm.
Fig. 5. Theoretical calculations of PBGs distribution and beam quality factor M2 based on the measured structural parameters.
Fig. 6. Theoretical calculations of FM profile and wavefront distribution at 870 nm, 1030 nm, and 1140 nm, respectively.
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Xiao Chen, Liangjin Huang, Yi An, Huan Yang, Zhiping Yan, Yisha Chen, Xiaoming Xi, Zhiyong Pan, Pu Zhou. Spectrally U-shaped profile of beam propagation factor in all-solid photonic bandgap fiber[J]. Chinese Optics Letters, 2022, 20(1): 010602
Category: Fiber Optics and Optical Communications
Received: Aug. 30, 2021
Accepted: Oct. 19, 2021
Posted: Oct. 19, 2021
Published Online: Nov. 25, 2021
The Author Email: Liangjin Huang (hlj203@nudt.edu.cn), Pu Zhou (zhoupu203@163.com)