Post-Treatment Techniques for Enhancing Mode-Coupling in Long Period Fiber Gratings Induced by CO2 Laser

Xizhen XU; Jian TANG; Jing ZHAO; Kaiming YANG; Cailing FU; Qiao WANG; Shen LIU; Changrui LIAO; Jiarong LIAN; Yiping WANG

doi:10.1007/s13320-015-0277-5

[1] D. D. Davis, T. K. Gaylord, E. N. Glytsis, S. G. Kosinski, S. C. Mettler, and A. M. Vengsarkar, “Long-period fibre grating fabrication with focused CO2 laser pulses,” Electronics Letters, 1998, 34(3): 302–303.

[2] Y. Rao, Y. Wang, Z. Ran, and T. Zhu, “Novel fiber-optic sensors based on long-period fiber gratings written by high-frequency CO2 laser pulses,” Journal of Lightwave Technology, 2003, 21(5): 1320–1327.

[3] Y. Wang and Y. Rao, “Long period fibre grating torsion sensor measuring twist rate and determining twist direction simultaneously,” Electronics Letters, 2004, 40(3): 164–166.

[4] Y. Wang, L. Xiao, D. Wang, and W. Jin, “Highly sensitive long-period fiber-grating strain sensor with low temperature sensitivity,” Optics Letters, 2006, 31(23): 3414–3416.

[5] Y. Wang, L. Xiao, D. Wang, and W. Jin, “In-fiber polarizer based on a long-period fiber grating written on photonic crystal fiber,” Optics Letters, 2007, 32(9): 1035–1037.

[6] Y. Wang, W. Jin, J. Ju, H. Xuan, H. L. Ho, L. Xiao, et al., “Long period gratings in air-core photonic bandgap fibers,” Optics Express, 2008, 16(4): 2784–2790.

[7] L. Drozin, P. Y. Fonjallaz, and L. Stensland, “Long-period fibre gratings written by CO2 exposure of H2-loaded, standard fibres,” Electronics Letters, 2000, 36(8): 742–744.

[8] Y. Liu and K. S. Chiang, “CO2 laser writing of long-period fiber gratings in optical fibers under tension,” Optics Letters, 2008, 33(17): 1933–1935.

[9] H. W. Lee and K. S. Chiang, “CO2 laser writing of long-period fiber grating in photonic crystal fiber under tension,” Optics Express, 2009, 17(6): 4533–4539.

[10] R. C. Chaves, A. d. A. P. Pohl, I. Abe, R. Sebem, and A. Paterno, “Strain and temperature characterization of LPGs written by CO2 laser in pure silica LMA photonic crystal fibers,” Photonic Sensors, 2015, 5(3): 241–250.

[11] A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, “Long-period fiber gratings as band-rejection filters,” Journal of Lightwave Technology, 1996, 14(1): 58–65.

[12] A. Singh, “Long period fiber grating based refractive index sensor with enhanced sensitivity using Michelson interferometric arrangement,” Photonic Sensors, 2014, 5(2): 172–179.

[13] Y. Wang, D. N. Wang, W. Jin, Y. Rao, and G. Peng, “Asymmetric long period fiber gratings fabricated by use of CO2 laser to carve periodic grooves on the optical fiber,” Applied Physics Letters, 2006, 89(15): 151105-1–151105-3.

[14] M. Vaziri and C. L. Chen, “Optical-fiber strain sensors with asymmetric etched structures,” Applied Optics, 1993, 32(31): 6399–6406.

[15] Y. Wang, J. Chen, and Y. Rao, “Torsion characteristics of long-period fiber gratings induced by high-frequency CO2 laser pulses,” Journal of the Optical Society of America B, 2005, 22(6): 1167–1172.

[16] S. Savin, M. J. F. Digonnet, G. S. Kino, and H. J. Shaw, “Tunable mechanically induced long-period fiber gratings,” Optics Letters, 2000, 25(10): 710–712.

[17] L. Su, K. S. Chiang, and C. Lu, “Microbend-induced mode coupling in a graded-index multimode fiber,” Applied Optics, 2005, 44(34): 7394–7402.

[18] H. Sakata and T. Iwazaki, “Sensitivity-variable fiber optic pressure sensors using microbend fiber gratings,” Optics Communications, 2009, 282(23): 4532–4536.

[19] Y. Wang, D. N. Wang, and W. Jin, “CO2 laser-grooved long period fiber grating temperature sensor system based on intensity modulation,” Applied Optics, 2006, 45(31): 7966–7970.

[20] Y. Wang, X. Tan, W. Jin, D. Ying, Y. L. Hoo, and S. Liu, “Temperature-controlled transformation in fiber types of fluid-filled photonic crystal fibers and applications,” Optics Letters, 2010, 35(1): 88–90.

[21] M. Kulishov and J. Azana, “Long-period fiber gratings as ultrafast optical differentiators,” Optics Letters, 2005, 30(20): 2700–2702.

[22] M. Dubov, I. Bennion, S. A. Slattery, and D. N. Nikogosyan, “Strong long-period fiber gratings recorded at 352 nm,” Optics Letters, 2005, 30(19): 2533–2535.