A semiconductor laser element includes: a semiconductor laser region in
which at least one laser emission portion including an active layer for
emitting light is provided; a multimode interference region including a
first wave-guiding layer, one end of the first wave-guiding layer being
optically coupled to the active layer of the at least one laser emission
portion; and an output waveguide region including a second wave-guiding
layer, the second wave-guiding layer being optically coupled to another
end of the first wave-guiding layer, wherein the active layer of the at
least one laser emission portion, the first wave-guiding layer, and the
second wave-guiding layer are integrally formed.
