Abstract
Special designs of sampled Bragg gratings have been used to fabricate distributed-feedback semiconductor laser arrays with very precise wavelength spacing and strong coupling coefficients. By dividing one sampling period into two equal sections, each with a grating but with a -phase shift between the sections, the st-order channels are enhanced while eliminating the zeroth-order reflection. By using multiple phase-shifted sections, only the st-order channel is enhanced. Using a single electron beam lithography step and two -phase-shifted sections, we have fabricated an eight-channel laser array with a channel spacing of 100 GHz.
© 2017 Optical Society of America
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