Nippon Telegraph and Telephone Corporation

Kazunori Senoo

Kenya Suzuki

Keita Yamaguchi

Yutaka Miyamoto

Toshikazu Hashimoto

Hirotaka Ono

Mitsumasa Nakajima

Takashi Go

Shingo Kawai

Mitsunori Fukutoku

In an optical switch array on which optical switches that require individual electric wires are integrated, the present invention provides an optical switch array and a multi-cast switch in which the electric wires are shortened by optimizing the arrangement of the optical circuit portion. In the optical switch array in which three arrays of 1&#xd7;4 switch circuits are disposed in parallel, the position where each optical switch is disposed is sequentially shifted by Dy in the y axis direction. That is, in the case where an adjacent 1&#xd7;4 optical switch circuit exists on both sides, the 1&#xd7;4 optical switch located there between is located at the center of the two 1&#xd7;4 optical switch circuits, which are adjacent in the y axis direction. Each of the three 1&#xd7;4 optical switch circuits that are arrayed are disposed at a position shifted from the adjacent 1&#xd7;4 optical switch circuit by Dy in the y axis direction, in accordance with the positional coordinate in the x axis direction, and the electric wires at the ground side are shared such that each optical switch circuit is located sequentially shifted by Dy in the &#x2212;y axis direction.

Optical switch array and multicast switch

The present invention implements an optical spectral shaper that is compact even if a number of input/output ports increases. The present invention provides a spatial light modulator, including: an optical waveguide front end that includes an input side waveguide portion which emits each signal light at a different angle while expanding a beam diameter of the signal light, and an output side waveguide portion that wave-guides each of the inputted signal lights, and couples the signal lights with a plurality of output fibers respectively; a spatial light modulator that changes the phase of each signal light by controlling the phase pattern of the plurality of pixels and emits the signal light, and the spatial light modulator in which a specific phase pattern is set for each pixel region to which each signal light enters; and an optical element group that is disposed so that each of the signal lights emitted from the optical waveguide front end is collected at a different pixel position on the spatial light modulator, and the light emitted from the spatial light modulator is coupled with the optical waveguide front end.

Optical spectrum shaper and optical signal monitor using same

An optical node device includes: a multicore optical amplification unit that amplifies collectively light transmitted along a multicore fiber; a separation unit that inputs the amplified light in each core to each of a plurality of input-side single-core fibers; an optical cross-connect switch that attenuates the light input from each of the plurality of input-side single-core fibers through an optical attenuator, separates the light in accordance with a wavelength, and outputs the separated light to an output-side single-core fiber of a plurality of output-side single-core fibers related to a respective output destination; a plurality of single-core optical amplification units that amplify the light transmitted along the corresponding output-side single-core fibers; and an output unit that outputs the light transmitted along each of the plurality of output-side single-core fibers to a multicore fiber. A control unit controls the optical attenuator and the single-core optical amplification unit based on input signal optical power and output optical signal power.

Optical node device

Growing community of inventors

Musashino, Japan

Kazunori Senoo