Electronics and Telecommunications Research Institute

Korea Telecom

Gwan Chong Joo

Sang Hwan Lee

Min Kyu Song

Nam Hwang

Ki S Park

Seung Goo Kang

Hong Man Kim

The present invention relates to an optical integrated circuit; and, more particularly, to a method for preparing an improved hybrid optical integrated circuit which is capable of accommodating optical waveguides, optical devices, such as light emitting devices and light receiving devices, and optical fibers in an effective manner. The present invention has the advantages of minimizing horizontal misalignment error between the SOI waveguide rib area, the V-groove etch window and the alignment marks, decreasing the manufacturing cost by passively aligning the waveguides, the optical devices and the optical fibers on a single substrate. Also, the present invention has an effect of reducing fresnel reflection loss by providing the LPCVD silicon nitride layer capable of being used as an anti-reflection coating layer at both ends of the waveguide.

Method for fabricating a hybrid optical integrated circuit employing SOI optical waveguide

A bidirectional optical communication module using a single optical fiber is disclosed. The module includes an optical fiber having a cut-away surface polished to have an acute angle between the cut-away surface and an axis of the optical fiber, a semiconductor laser emitting a transmission light coupled with a light fiber core, and a bidirectional optical device having a light receiving portion absorbing a receiving light outputted from the light fiber core for thereby optically coupling a bidirectional optical device in which a light receiving device is integrated into a light transmitting semiconductor laser as a single chip and an optical fiber when fabricating an optical module for implementing a light signal transmission and receiving operation using one optical fiber.

Bidirectional optical communication module using single optical fiber

Growing community of inventors

Daejeon, South Korea

Gwan Chong Joo