Wavelength characteristic variable apparatus
AssigneeFujitsu Limited
InventorsNobuaki Mitamura, Norihisa Naganuma
Life of this patent
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Abstract
A movable mirror having a mirror surface reflecting a light input from an input fiber collimator is moved in an arrow (1) direction so that the reflection frequency of the input light reflected by an optical filter can be variable. The light is reflected plural times between the mirror surface and the optical filter, directed to a fixed mirror by the mirror surface, reflected by the fixed mirror, and is connected to an output fiber collimator. By moving the movable mirror in parallel, the reflection count of the light between the optical filter and the mirror surface is variable. Therefore, the wavelength characteristic of the light is obtained as an accumulated wavelength characteristic depending on the reflection count.
Claims14
A wavelength characteristic variable apparatus, comprising:
- an optical filter unit having a desired wavelength characteristic;
- and
- a reflection unit capable of turning back an input optical beam, and varying a number of times the optical beam is input into said optical filter unit, wherein
- said wavelength characteristic can be effectively varied by changing a number of times the optical beam is input into said optical filter unit.
Dependencies are inferred from the claim text.