A novel design and fabrication approach for a high fill-factor micro-electro-mechanical system (MEMS) micromirror array-based wavelength-selective switch (WSS) is presented. The WSS is composed of a polarization-independent transmission grating and a high fill-factor micromirror array. The WSS is successfully demonstrated based on the fabricated high fill-factor micromirror array. Test results show that the polarization-dependent loss (PDL) is less than 0.3 dB and that the insertion loss (IL) of the wavelength channel is about -6 dB. The switching function between the two output ports of WSS is measured. The forward switching time is recorded to be about 0.5 ms, whereas the backward switching time is about 7 ms.
© 2011 Chinese Optics Letters
(230.4040) Optical devices : Mirrors
(060.2605) Fiber optics and optical communications : Free-space optical communication
(230.4685) Optical devices : Optical microelectromechanical devices
(130.4815) Integrated optics : Optical switching devices
Sihua Li, Zhujun Wan, Jing Xu, Shaolong Zhong, and Yaming Wu, "Wavelength-selective switch based on a high f ill-factor micromirror array," Chin. Opt. Lett. 9, 090601- (2011)