Abstract
For the first time, an optimized optical add–drop filter (OADF) for dense
wavelength-division-multiplexing systems is demonstrated using the Texas Instruments microelectro-mechanical-system
Digital Micromirror Device (DMD™). This OADF features a polarization-insensitive fault-tolerant broadband
operation, low loss, and the ability to selectively add/drop with high-wavelength-resolution multiple channels in
the C telecommunications band. The proof-of-concept OADF designed for the C-band demonstrates low insertion loss,
0.15-dB polarization dependent loss, 3-dB wavelength resolution of 0.4 nm, and an average crosstalk of better than
30 dB. With the use of a reference mirror, the OADF becomes a multiwavelength 2 x 2 routing switch.
© 2007 IEEE
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