are described and demonstrated. Polarization effects due to stress birefringence and
polarization-dependent grating efficiency have been eliminated using a modified
polarization compensator and grating design. The devices have a polarization-dependent
wavelength shift of less than 10 pm, and a polarization-dependent loss below 0.2 dB. The 48-
channel device has a measured crosstalk of-35 dB, an insertion loss better than 4 dB, and a …