Disclosed is a variable alignment-type optical fiber block in which alignment
of waveguides can be changed according to temperature. The optical fiber block
includes: a substrate having a receiving section formed at one end of the substrate,
the receiving section having a predetermined volume; a ferrule seated in the receiving
section, the ferrule having a hole in which an optical fiber is inserted; a first
expandable block disposed between one side surface of the ferrule and an inner
wall surface of the receiving section, which are opposed to each other, the first
expandable block having a first thermal expansive coefficient; and, a second expandable
block disposed between the other side surface of the ferrule and another inner
wall surface of the receiving section, which are opposed to each other, the second
expandable block having a second thermal expansive coefficient.
