SPIE Proceedings [SPIE 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems - Chengdu, China (Sunday 8 July 2007)] 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems - Precise wavelength demodulator used for fiber sensitivity