National Central University

Mao-Jen Wu

Chia-Chi Chang

Jen-Yu Chang

Yun-Chih Lee

Hsiao-Chin Lan

Hsu-Liang Hsiao

Chin-Ta Chen

Bo-Kuan Shen

Guan-Fu Lu

Yan-Chong Chang

Jen-Inn Chyi

Jin-Wei Shi

Jinn-Kong Sheu

Chun-Kai Wang

Cheng-Hiong Chen

An optical transmission module includes a semiconductor substrate, a first film layer, an electronic component layer and a waveguide structure. The electronic component layer is used for converting a first electrical signal into an optical signal. The waveguide structure is formed on the first film layer, and includes a first reflective surface, a waveguide body and a second reflective surface. After the optical signal is transmitted through the semiconductor substrate and the first film layer and enters the waveguide structure, the optical signal is reflected by the first reflective surface, transmitted within the waveguide body and reflected by the second reflective surface. After the optical signal reflected by the second reflective surface is transmitted through the first film layer and the semiconductor substrate and received by the electronic component layer, the optical signal is converted into a second electrical signal by the electronic component layer.

Optical transmission module

The optical coupler module for converting and transmitting electrical/optical signals includes a semiconductor substrate, a first film, a second film, an electrical transmission unit, at least one signal conversion unit and an optical waveguide structure. The first film and the second film are formed on opposite surfaces of the semiconductor substrate. The signal conversion unit and the optical waveguide structure are disposed on opposite sides of the semiconductor substrate. The optical waveguide structure has a reflector and a waveguide body. The optical signal generated from the signal conversion unit sequentially passes the first film, the semiconductor substrate and the second film and enters the optical waveguide structure. Then, the optical signal is reflected by the reflector and transmitted in the waveguide body to be outputted. Alternatively, the optical signal is transmitted in a reverse direction from the optical waveguide structure to the signal conversion unit.

Optical coupler module having optical waveguide structure

An optical coupler module includes a semiconductor substrate disposed on the print circuit board; a reflecting trench structure formed on the semiconductor substrate; a reflector formed on a slant surface of the reflecting trench structure; a strip trench structure formed on the semiconductor substrate and connecting with the reflecting trench structure; a thin film disposed on the above-mentioned structure. The optical coupler module further includes a signal conversion unit disposed on the semiconductor substrate and the position of the signal conversion unit corresponds to the reflector; and an optical waveguide structure formed in the trench structures. The optical signal from the signal conversion unit is reflected by the reflector and then transmitted in the optical waveguide structure, or in a reverse direction to reach the signal conversion unit.

Green light emitting diodes (LED) of gallium arsenide (GaAs) are series-connected. The series connection has a small transmission attenuation and a wide bandwidth. The GaAs LED has a big forward bias and so neither extra driving current nor complex resonant-cavity epitaxy layer is needed. Hence, the present invention has a high velocity, a high efficiency and a high power while an uneven current distribution is avoided.

Method of fabricating linear cascade high-speed green light emitting diode

Growing community of inventors

Taoyuan, Taiwan

Mao-Jen Wu