Nippon Telegraph and Telephone Corporation

Ntt Electronics Corporation

Mikitaka Ito

Akimasa Kaneko

Toshio Watanabe

Takayuki Mizuno

Yasuyuki Inoue

Takashi Goh

Tsutomu Kitoh

Tomoyuki Yamada

Yoshinori Hibino

Mitsuru Nagano

Two AWG circuits are integrated while preventing degradation in quality of a multiplexing/demultiplexing function. An arrayed waveguide grating circuit includes: a first slab waveguide () connected to a first input waveguide () and second output waveguides (); a second slab waveguide () connected to first output waveguides () and a second input waveguide (); and an array waveguide () connecting the first slab waveguide () and the second slab waveguide (), wherein the input waveguides () are connected to the slab waveguides () at an interval of 1.5&#xd7; from the outermost second output waveguide out of the second output waveguides () connected at an interval x depending on a wavelength.

Arrayed waveguide grating circuit

An arrayed waveguide grating type optical multiplexer/demultiplexer circuit in which wavelength dispersion is reduced. An input wave guide (), a first slab waveguide (), an arrayed waveguide (), a second slab waveguide () and an output waveguide () are connected sequentially. Furthermore, a parabola waveguide () is provided between the input waveguide () and the first slab waveguide (), and a taper waveguide () is provided between the second slab waveguide () and the output waveguide (). A parabola waveguide length Zexists in a range Z=Z=Zdetermined by a parabola waveguide length Zwhere the ratio of absolute amplitude between the main peak and the first side peak in the field distribution of far-field of the parabola waveguide () has an upper limit of 0.217, and a parabola waveguide length Zwhere the relative phase of the main peak and the first side peak in the field distribution of far-field has a lower limit of 3.14 radian.

Arrayed waveguide grating type optical multiplexer/demultiplexer circuit

Growing community of inventors

Tokyo, Japan

Mikitaka Ito