Abstract

Novel optical-waveguide mode filters, based on mode-selective coupling between nonidentical waveguides and attenuation in a lossy waveguide, are proposed and demonstrated. Both TE0 and TM0 mode filters were fabricated from glass compositions by rf-sputtering. For both the TE0 and TM0 mode filters, insertion losses were 2.1 dB and 1.1 dB, respectively, and attentuations for undesirable modes were 16.8 dB and 21.6 dB, respectively.

© 1978 Optical Society of America

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