OFS Research Over the Last 10 Years at CQU &amp; UESTC

Yunjiang RAO

doi:10.1007/s13320-012-0057-4

[1] Y. J. Rao, “Studies on fiber optic low-coherence interferometric and fiber Brag grating sensors,” Photonic Sensors, vol. 1, no. 4, 382-400, 2011.

[2] Y. J. Rao, Y. P. Wang, Z. L. 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, vol. 21, no. 5, pp. 1320-1327, 2003.

[3] T. Zhu, Y. J. Rao, J. L. Wang, and Y. Song, “A highly sensitive fiber-optic refractive index sensor based on an edge-written long-period fiber grating,” IEEE Photonics Technology Letters, vol. 19, no. 24, pp. 1946-1948, 2007.

[4] Y. P. Wang, D. N. Wang, W. Jin, Y. J. Rao, and G. D. Peng, “Asymmetric long period fiber gratings fabricated by use of CO2 laser to carve periodic grooves on the optical fiber,” Applied Physics Letters, vol. 89, no. 15, pp. 151105, 2006.

[5] Y. Liu, H. W. Ho, K. S. Chiang, T. Zhu, and Y. J. Rao, “Glass structure changes in CO2-laser writing of long-period fiber gratings in Boron-doped single-mode fibers,” Journal of Lightwave Technology, vol. 27, no. 7, pp. 857-863, 2009.

[6] Y. Gu, K. S. Chiang, and Y. J. Rao, “Writing of apodized phase-shifted long-period fiber gratings with a computer-controlled CO2 laser,” IEEE Photonics Technology Letters, vol. 21, no. 10, pp. 657-659, 2009.

[7] T. Zhu, Y. J. Rao, Y. Song, K. S. Chiang, and M. Liu, “Highly sensitive temperature-independent strain sensor based on a long-period fiber grating with a CO2-laser engraved rotary structure,” IEEE Photonics Technology Letters, vol. 21, no. 8, pp. 543-545, 2009.

[8] T. Zhu, K. S. Chiang, Y. J. Rao, C. H. Shi, Y. Song, and M. Liu, “Characterization of long-period fiber gratings written by CO2 laser in twisted single-mode fibers,” Journal of Lightwave Technology, vol. 27, no. 21, pp. 4863-4869, 2009.

[9] Y. J. Rao, D. W. Duan, Y. E. Fan, T. Ke, and M. Xu, “High-temperature annealing behaviors of CO2 laser pulse-induced long-period fiber grating in a photonic crystal fiber,” Journal of Lightwave Technology, vol. 28, no. 10, pp. 1530-1535, 2010.

[10] Y. J. Rao, T. Zhu, and Q. J. Mo, “Highly sensitive fiber-optic torsion sensor based on an ultra-long-period fiber grating,” Optics Communications, vol. 266, no. 1, pp. 187-190, 2006.

[11] T. Zhu, Y. J. Rao, and Q. J. Mo, “High sensitivity fiber-optic torsion sensor based on a novel ultra long-period fiber grating,” Acta Physica Sinica, vol. 55, no. 1, pp. 249-253, 2006 (in Chinese).

[12] T. Zhu, Y. J. Rao, Q. J. Mo, and J. L. Wang, “Study on characteristics of a CO2-laser-induced ultra-long-period fiber grating,” Acta Physica Sinica, vol. 56, no. 9, pp. 5287-5292, 2007 (in Chinese).

[13] T. Zhu, Y. J. Rao, and J. L. Wang, “Characteristics of novel ultra-long-period fiber gratings fabricated by high-frequency CO2 laser pulses,” Optics Communications, vol. 277, no. 1, pp. 84-88, 2007.

[14] Y. P. Wang, Y. J. Rao, Z. L. Ran, T. Zhu, and X. K. Zeng, “Bend-insensitive long-period fiber grating sensors,” Optics and Lasers in Engineering, vol. 41, no. 1, pp. 233-239, 2004.

[15] Y. P. Wang and Y. J. Rao, “Long period fiber grating torsion sensor measuring twist rate and determining twist direction simultaneously,” Electronics Letters, vol. 40, no. 3, pp. 164-166, 2004.

[16] Y. P. Wang and Y. J. Rao, “CO2-laser induced LPFG torsion characteristics depending on length of twisted fiber,” Electronics Letters, vol. 40, no. 18, pp. 1101-1103, 2004.

[17] T. Zhu, Y. J. Rao, J. L. Wang, and M. Liu, “Transverse-load characteristics of twisted long-period fiber gratings written by high-frequency CO2 laser pulses,” Electronics Letters, vol. 42, no. 8, pp. 21-22, 2006.

[18] Y. P. Wang, J. P. Chen, and Y. J. Rao, “Torsion characteristics of long-period fiber gratings induced by high-frequency CO2 laser pulses,” Journal of the Optical Society of America B: Optical Physics, vol. 22, no. 6, pp. 1167-1172, 2005.

[19] Y. P. Wang, D. N. Wang, W. Jin, and Y. J. Rao, “Asymmetric transverse-load characteristics and polarization dependence of long-period fiber gratings written by a focused CO2 laser,” Applied Optics, vol. 46, no. 16, pp. 3079-3086, 2007.

[20] Y. P. Wang and Y. J. Rao, “A novel long period fiber grating sensor measuring curvature and determining bend-direction simultaneously,” IEEE Sensors Journal, vol. 5, no. 5, pp. 839-843, 2005.

[21] T. Zhu, Y. J. Rao, and Q. J. Mo, “Simultaneous measurement of refractive index and temperature using a single ultralong-period fiber grating,” IEEE Photonics Technology Letters, vol. 17, no. 12, pp. 2700-2702, 2005.

[22] Y. P. Wang, Y. J. Rao, Z. L. Ran, T. Zhu, and A. Z. Hu, “A novel tunable gain equalizer based on a long-period fiber grating written by high-frequency CO2 laser pulses,” IEEE Photonics Technology Letters, vol. 15, no. 2, pp. 251-253, 2003.

[23] Y. J. Rao, T. Zhu, Z. L. Ran, Y. P. Wang, J. Jiang, and A. Z. Hu, “Novel long-period fiber gratings written by high-frequency CO2 laser pulses and applications in optical fiber communication,” Optics Communications, vol. 229, no. 1-6, pp. 209-221, 2004.

[24] Y. J. Rao, A. Z. Hu, and Y. C. Niu, “A novel dynamic LPFG gain equalizer written in a bend-insensitive fiber,” Optics Communications, vol. 244, no. 1-6, pp. 137-140, 2005.

[25] T. Zhu, Y. J. Rao, R. K. Wang, and J. L. Wang, “All fiber dynamic gain equalizer based on a fiber grating with rotary refractive index change,” Acta Physica Sinica, vol. 55, no. 9, pp. 4720-4724, 2006 (in Chinese).

[26] T. Zhu, Y. J. Rao, and J. L. Wang, “All-fiber dynamic gain equalizer based on a twisted long-period grating written by high-frequency CO2 laser pulses,” Applied Optics, vol. 46, no. 3, pp. 375-378, 2007.

[27] Y. Q. Liu, K. S. Chiang, Y. J. Rao, Z. L. Ran, and T. Zhu, “Light coupling between two parallel CO2-laser written long-period fiber gratings,” Optics Express, vol. 15, no. 26, pp. 17645-17651, 2007.

[28] T. Zhu, C. H. Shi, Y. J. Rao, L. L. Shi, and K. S. Chiang, “All-fiber bandwidth-tunable band-rejection filter based on a composite grating induced by CO2 laser pulses,” Optics Express, vol. 17, no. 19, pp. 16750-16755, 2009.

[29] Y. J. Rao, J. Luo, Z. L. Ran, J. F. Yue, X. D. Luo, and Z. Zhou, “Long-distance fiber-optic Φ-OTDR intrusion sensing system,” in Proc. SPIE (The International Society for Optical Engineering, 20th International Conference on Optical Fiber Sensors), vol. 7503, pp. 75031O, 2009.

[30] K. L. Xie, Y. J. Rao, and Z. L. Ran, “Distributed optical fiber sensing system based of Rayleigh scattering light Φ-OTDR using single-mode fiber laser with high power and narrow linewidth,” Acta Optica Sinica, vol. 28, no. 3, pp. 569-572, 2008 (in Chinese).

[31] J. Luo, Y. J. Rao, J. F. Yue, and Z. L. Ran, “Highly sensitive distributed optical fiber intrusion monitoring system,” Chinese Journal of Scientific Instrument, vol. 30, no. 6, pp. 1123-1128, 2009 (in Chinese).

[32] Y. J. Rao, J. Z. Li, Z. L. Ran, and K. L. Xie, “Distributed intrusion detection based on combination of Φ-OTDR and POTDR,” in Proc. SPIE (The International Society for Optical Engineering, 19th International Conference on Optical Fiber Sensors), vol. 7004, pp. 700461, 2008.

[33] Z. L. Ran, Y. J. Rao, L. W. Luo, S. Xiong, and Q. Deng, “Φ-OTDR used for providing security service in EPON,” in OECC (14th OptoElectronics and Communications Conference), pp. 5213305, 2009.

[34] X. H. Jia, Y. J. Rao, L. Chang, C. Zhang, and Z. L. Ran, “Enhanced sensing performance in long distance brillouin optical time-domain analyzer based on Raman amplification: Theoretical and experimental investigation,” Journal of Lightwave Technology, vol. 28, no. 11, pp. 1624-1630, 2010.

[35] Y. J. Rao, X. H. Jia, L. Li, and Z. L. Ran, “Detailed investigation on gain-clamping characteristics of ultralong fiber Raman laser using FBGs,” Journal of the Optical Society of America B: Optical Physics, vol. 26, no. 7, pp. 1334-1340, 2009.

[36] Y. Wu, Y. J. Rao, Y. H. Chen, and Y. Gong, “Miniature fiber-optic temperature sensors based on silica/polymer microfiber knot resonators,” Optics Express, vol. 17, no. 20, pp. 18142-18147, 2009.

[37] Y. Wu, X. Zeng, Y. J. Rao, Y. Gong, C. Hou, and G. Yang, “MOEMS accelerometer based on microfiber knot resonator,” IEEE Photonics Technology Letters, vol. 21, no. 20, pp. 1547-1549, 2009.

[38] Y. H. Chen, Y. Wu, Y. J. Rao, and Y. Gong, “Hybrid Mach-Zehnder interferometer and knot resonator based on silica microfibers,” Optics Communications, vol. 283, no. 14, pp. 2953-2956, 2010.