Arrayed waveguide grating and method for compensating optical transmitting center wavelength of light traveling through the same

An arrayed waveguide grating through which light travels, comprising:

• at least one first optical waveguide;
• a first slab waveguide;
• a plurality of arrayed waveguides connected to said at least one first optical waveguide via said first slab waveguide, each of said plurality of arrayed waveguides having a different length;
• a second slab waveguide;
• a plurality of second optical waveguides connected to said plurality of arrayed waveguides via the second slab waveguide, at least one of said first and second slab waveguides being partitioned to first and second segments at a partition surface intersecting a path of the light;
• and
• a moving member configured to slide the at least one of the first and second segments along the partition surface to compensate an optical transmitting center wavelength of the light according to a temperature of the arrayed waveguide grating, the moving member including an expanding and contracting material which is configured to expand or contract corresponding to a change in the temperature by an amount corresponding to a shift of the optical transmitting center wavelength caused by the change in the temperature.

An arrayed waveguide grating through which light travels, comprising:

• at least one first optical waveguide;
• a first slab waveguide;
• a plurality of arrayed waveguides connected to said at least one first optical waveguide via said first slab waveguide, each of said plurality of arrayed waveguides having a different length;
• a second slab waveguide;
• a plurality of second optical waveguides connected to said plurality of arrayed waveguides via the second slab waveguide, at least one of said first and second slab waveguides being partitioned to first and second segments at a partition surface intersecting a path of the light;
• a moving member configured to slide the at least one of the first and second segments along the partition surface;
• a temperature sensor configured to detect a temperature of the arrayed waveguide grating;
• and
• a controller configured to control a movement of the moving member based on the temperature detected by the temperature sensor to compensate an optical transmitting center wavelength of the light.

A method for compensating an optical transmitting center wavelength of light which travels through an arrayed waveguide grating which includes a plurality of arrayed waveguides connecting a first slab waveguide and a second slab waveguide, the method comprising:

• partitioning at least one of said first and second slab waveguides to first and second segments at a partition surface intersecting a path of the light;
• providing a moving member configured to slide the at least one of the first and second segments along the partition surface;
• detecting a temperature of the arrayed waveguide grating;
• and
• controlling a movement of the moving member based on the detected temperature to compensate an optical transmitting center wavelength of the light.

A wavelength division multiplexing system comprising:

• a MUX/DEMUX unit;
• a DEMUX/MUX unit;
• a communication unit including at least any one of a point-to-point element, an optical ADM element or an optical XC element;
• and
• an arrayed waveguide grating through which light travels, the arrayed waveguide grating comprising:
• at least one first optical waveguide;
• a first slab waveguide;
• a plurality of arrayed waveguides connected to said at least one first optical waveguide via said first slab waveguide, each of said plurality of arrayed waveguides having a different length;
• a second slab waveguide;
• a plurality of second optical waveguides connected to said plurality of arrayed waveguides via the second slab waveguide, at least one of said first and second slab waveguides being partitioned to first and second segments at a partition surface intersecting a path of the light;
• and
• a moving member configured to slide the at least one of the first and second segments along the partition surface to compensate an optical transmitting center wavelength of the light according to a temperature of the arrayed waveguide grating, the moving member including an expanding and contracting material which is configured to expand or contract corresponding to a change in the temperature by an amount corresponding to a shift of the optical transmitting center wavelength caused by the change in the temperature.

A wavelength division multiplexing system comprising:

• a MUX/DEMUX unit;
• a DEMUX/MUX unit;
• a communication unit including at least any one of a point-to-point element, an optical ADM element or an optical XC element;
• and
• an arrayed waveguide grating through which light travels, the arrayed waveguide grating comprising:
• at least one first optical waveguide;
• a first slab waveguide;
• a plurality of arrayed waveguides connected to said at least one first optical waveguide via said first slab waveguide, each of said plurality of arrayed waveguides having a different length;
• a second slab waveguide;
• a plurality of second optical waveguides connected to said plurality of arrayed waveguides via the second slab waveguide, at least one of said first and second slab waveguides being partitioned to first and second segments at a partition surface intersecting a path of the light;
• and
• a moving member configured to slide the at least one of the first and second segments along the partition surface;
• a temperature sensor configured to detect a temperature of the arrayed waveguide grating;
• and
• a controller configured to control a movement of the moving member based on the temperature detected by the temperature sensor to compensate an optical transmitting center wavelength of the light.

An arrayed waveguide grating through which light travels, comprising:

• a first slab waveguide;
• a second slab waveguide;
• a plurality of arrayed waveguides connecting said first slab waveguide and said second slab waveguide, each of said plurality of arrayed waveguides having a different length, at least one of said first and second slab waveguides being partitioned to first and second segments at a partition surface intersecting a path of the light;
• and
• a moving member configured to slide the at least one of the first and second segments along the partition surface to compensate an optical transmitting center wavelength of the light according to a temperature of the arrayed waveguide grating, the moving member including an expanding and contracting material which is configured to expand or contract corresponding to a change in the temperature by an amount corresponding to a shift of the optical transmitting center wavelength caused by the change in the temperature.

An arrayed waveguide grating through which light travels, comprising:

• a first slab waveguide;
• a second slab waveguide;
• a plurality of arrayed waveguides connecting said first slab waveguide and said second slab waveguide, each of said plurality of arrayed waveguides having a different length, at least one of said first and second slab waveguides being partitioned to first and second segments at a partition surface intersecting a path of the light;
• a moving member configured to slide the at least one of the first and second segments along the partition surface;
• a temperature sensor configured to detect a temperature of the arrayed waveguide grating;
• and
• a controller configured to control a movement of the moving member based on the temperature detected by the temperature sensor to compensate an optical transmitting center wavelength of the light.