Design and application of very low-loss abrupt bends in optical waveguides
- 1 January 1994
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Quantum Electronics
- Vol. 30 (12) , 2827-2835
- https://doi.org/10.1109/3.362727
Abstract
A new low-loss abrupt bend structure of the microprism type is proposed. This new bend uses a microprism to compensate for the phase difference of the phase front before and after the bend corner, so the entire phase front of the eigenmode is tilted properly, resulting in a very low-loss characteristic. Simulated results show that a normalized transmitted power of greater than 95% is achieved for a bend angle of 10°. Moreover, a phase compensation rule and its corrections are presented to determine the optimal prism parameters. Application examples of the microprism to design a very low-loss large-angle Z-bend and two cascaded Z-bends are also shownKeywords
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