Song Yang, Yulai She, Hao Du, Wentao Zhang, Jianfeng Rong. Structural design of bending-resistant all-solid fiber with large mode field[J]. Infrared and Laser Engineering, 2023, 52(3): 20220551
- Infrared and Laser Engineering
- Vol. 52, Issue 3, 20220551 (2023)
Fig. 1. Schematic diagram of fiber 2D cross-section; (b) Fiber refractive index distribution
Fig. 2. Mesh generation of cross-section of proposed fiber
Fig. 3. (a) Bending loss of FM and HOMs; (b) Mode field area of FM and variation of high-fundament loss ratio with r
Fig. 4. (a) Bending loss of FM and HOMs; (b) Mode field area of FM; (c) Variation of high-fundament loss ratio with t and t 2
Fig. 5. (a) Bending loss of FM and HOMs; (b) Mode field area of FM; (c) Variation of high-fundament loss ratio with t 1 and d
Fig. 6. (a) Bending loss of FM and HOMs; (b) Mode field area of FM; (c) Variation of high-fundament loss ratio with d 1 and t 3
Fig. 7. (a1)-(c1) Electric mode field distribution of FM when the refractive index ring are trapezoidal, rectangular, Triangle; (a2)-(c2) Electric mode field distribution of HOMs when the refractive index ring are trapezoid, rectangular, triangle
Fig. 8. (a) Bending loss of FM and HOMs; (b) Mode field area of FM and bending loss ratio with the number of trenches
Fig. 9. (a1)-(d1) Electric field distribution of FM with 0 type trench to 3 types trenches; (a2)-(d2) Electric field distribution of HOMs with 0 type trench to 3 types trenches
Fig. 10. Change trend of FM, HOMs and effective mode field area with thermal load
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Table 1. Performance comparison of fibers with different structures of refractive index ring
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