[1] GAO Hua-li, WU Chong-qing, LI Ya-jie and NI Dong, Optoelectronics Letters 2, 142 (2006).
[2] Wang Xiaoliang, Chen Daru, Ma Xiaowei, Li Haitao and Luo Shujun, Optoelectronics Letters 12, 261 (2016).
[3] Eugen Friesen, Christopher Gessenhardt, Sebastian A. Kaiser and Thomas Dreier, Optics Letters 37, 5244 (2012).
[4] Ruan J, Huang P and Qin Z, IEEE Photonics Technology Letters 27, 62 (2015).
[5] M. Ramakrishnan, G. Rajan, Y. Semenova and G. Farrell, IEEE Sensors Journal 14, 2571 (2014).
[6] Huang Y, Zhou Z and Zhang Y, IEEE Transactions on Instrumentation & Measurement 59, 2997 (2010).
[7] Kim B H, Lee S H and Lin A, Optics Express 17, 1789 (2009).
[8] Ruan Juan, Z. X. Qin and Q. K. Zeng, Optics Communications 319, 42 (2014).
[9] Linh Viet Nguyen, Stephen C. Warren-Smith, Heike Ebendorff-Heidepriem and Tanya M. Monro, Optics Express 24, 8967 (2016).
[10] Leonhard Polz, Barbara Hopf, Andreas Jarsen, Michael Eitzenberger, Markus Lindner, Hartmut Bartelt and Johannes Roths, Journal of Lightwave Technology 34, 4550 (2016).