A very low-loss wide-angle Y-branch with a composite diamond-like microprism

Author

Lin, Han-Bin

Author_Institution

Dept. of Electr. Eng., China Inst. of Technol. & Commerce, Taipei, Taiwan

Volume

37

Issue

2

fYear

2001

fDate

2/1/2001 12:00:00 AM

Firstpage

231

Lastpage

236

Abstract

A very low-loss wide-angle symmetric Y-branch with a low-index composite diamond-like microprism (CDM) is proposed. The CDM is composed of a diamond-like microprism (DM) and a post-compensating microprism (PM). The former is designed to compensate the phase-front mismatch at the branching point, and it will improve the field mismatch by this diamond-like shape; the latter is used to reduce the coupling between the branches. After complete phase-front compensation of the CDM; the simulated normalized transmission will maintain 96.4% even if the branching angle is up to 200. Besides, the design rules of the indices of CDM are remarkably readily derived and efficient. This structure will also provide various advantages of simple shape, relative insensitivity to fabrication errors, and flexible selection of prism index. Furthermore, detailed examinations of the design parameters have been discussed relative to the transmission characteristics

Keywords

compensation; integrated optics; micro-optics; optical design techniques; optical losses; optical prisms; branching angle; branching point; complete phase-front compensation; composite diamond-like microprism; design parameters; fabrication errors; field mismatch; phase-front mismatch; post-compensating microprism; prism index; transmission characteristics; very low-loss wide-angle Y-branch; Couplings; Delta modulation; Dielectrics; Optical device fabrication; Optical devices; Optical modulation; Optical refraction; Optical waveguides; Power combiners; Power dividers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.903073

Filename

903073