1 x N-2 wavelength-selective switch with two cross-scanning one-axis analog micromirror arrays in a 4-f optical system

Tsai J., Huang S., Hah D., Wu M.

JOURNAL OF LIGHTWAVE TECHNOLOGY, vol.24, no.2, pp.897-903, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 2
  • Publication Date: 2006
  • Doi Number: 10.1109/jlt.2005.861915
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.897-903
  • Keywords: microelectromechanical devices, optical components, optical fiber switches, wavelength division multiplexing
  • Abdullah Gül University Affiliated: No


A new high-port-count wavelength-selective switch (WSS) has been realized using two cross-scanning one-axis analog micromirror arrays in a 4 - f optical system. The number of output ports is increased from N to N-2, where N is the maximum linear port count limited by optical diffraction. Using surface-micromachined micromirrors with hidden vertical comb drives, large scan angles (> +/- 5 degrees mechanical), low drive voltages (7 V), and high fill factors (> 96.25%) are achieved for both scanning mirrors. Experimental results for WSS are demonstrated using both two-dimensional (2-D) array of discrete collimators and monolithic 2-D collimator array. A fiber-to-fiber insertion loss ranging from 6 to 18 dB and a switching time of < 700 mu s have been achieved.