| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength variable filter that constitutes a light interference circuit with a variable transmission property and that achieves nondependability on temperature for ambient temperature. SOLUTION: The embodiment is characterized in that a heater 30 is mounted for locally heating an optical resin 21. The illustrated heater 30 is a rough configuration of it and, in actuality, an externally attachable heater capable of locally heating the optical resin is sufficient. Also, from the heater 30, an electric wiring 40 for applying an electric power is taken out. Meantime, for the purpose of making this AWG nondependent on temperature, a groove 20 is formed in a first slab waveguide 12 and the optical resin 21 is filled into the groove. However, by designing the light interference circuit constituting the AWG so that the groove 20 and the optical resin 21 satisfy an expression (1), nondependability on temperature is achieved. COPYRIGHT: (C)2010,JPO&INPIT |
