1. Key Laboratory of All Optical Network and Advanced Telecommunication Network Ministry of Education Institute of Lightwave Technology Beijing Jiaotong University Beijing China
2. National Institute of Metrology Beijing China
3. Institute of Microelectronics of the Chinese Academy of Sciences Beijing China
4. Poly Microchip Technology Co. LTD Beijing China
5. Shanghai Institute of Measurement and Testing Technology National Center of Measurement and Testing for East China National Center of Testing Technology Shanghai China