A structure that tan reduce abrupt-bend losses in dielectric optical waveguides is proposed. The structure has a relatively low refractive-index region at the outside of the corner; the region operates as a phase-front accelerator of the propagating mode. It has been ascertained by basic experiments that the bending loss of this structure can be significantly reduced from that of the conventional one.
© 1986 Optical Society of America
Original Manuscript: June 18, 1986
Manuscript Accepted: August 21, 1986
Published: November 1, 1986
Toru Shiina, Kazuo Shiraishi, and Shojiro Kawakami, "Waveguide-bend configuration with low-loss characteristics," Opt. Lett. 11, 736-738 (1986)