[1] Aiello G. R. and Rogerson G. D., Microw. Mag. IEEE 4, 36 (2003).
[2] Weiwei Zhang, Junqiang Sun, Jian Wang, Cheng Cheng and Xinliang Zhang, Photon. Technol. Lett. IEEE 21, 271 (2009).
[3] Fei Wang, Jianji Dong, Enming Xu and Xinliang Zhang, Optics Express 18, 24588 (2010).
[4] Xianbin Yu, Timothy Braidwood Gibbon, Michal Pawlik, Soren Blaaberg and Idelfonso Taful Monroy, Optics Express 17, 9680 (2009).
[5] Tsu-Hsiu Wu, Jui-pin Wu and Yi-Jen Chiu, Optics Express 18, 3379 (2010).
[6] Chao Wang, Fei Zeng and Jianping Yao, Photon. Technol. Lett. IEEE 19, 137 (2007).
[7] Hongwei Chen, Minghua Chen, Tianliang Wang, Mo Li and Shizhong Xie, Journal of Lightwave Technology 26, 2492 (2008).
[8] Fangzheng Zhang, Jian Wu, Songnian Fu, Kuu Xu, Yan Li, Xiaobin Hong, Ping Shum and Jintong Lin, Optics Express 18, 15870 (2010).
[9] You Min Chang, Junsu Lee and Ju Han Lee, Optics Express 18, 20072 (2010).
[10] Jian Wang, Junqiang Sun, Xinliang Zhang and Dexiu Huang, Journal of Quantum Electronics 45, 292 (2009).
[11] Hao Huang, Kun Xu, Jiangqiang Li, Jian Wu, Xiaobin Hong and Jintong Lin, Journal of Lightwave Technology 26, 2635 (2008).
[12] Zhao Yu, Liu Yongzhi and Zhao Deshuang, Journal of Optoelectronics Laser 20, 329 (2009). (in Chinese)
[13] Li Jun, Huang Dexiu and Zhang Xinliang, Optics and Precision Engineering 11, 68 (2004). (in Chinese)