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 N2, 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 ° 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 µs have been achieved.
© 2006 IEEE
Jui-che Tsai, Sophia Ting-Yu Huang, Dooyoung Hah, and Ming C. Wu, "1 × N2 Wavelength-Selective Switch With Two Cross-Scanning One-Axis Analog Micromirror Arrays in a 4-f Optical System," J. Lightwave Technol. 24, 897- (2006)