homowavelength crosstalk is a crosstalk that occur on a single wavelength.

True

Crosstalk - 1982 is rated/received certificates of:

Australia:M

Iceland:12

Reducing crosstalk depends on where the crosstalk is occurring. In adjacent channels on something like, say, a microwave link, polarizing the signals on adjacent channels alternately works pretty well. There are other ways, and lots of other places where crosstalk can appear. Just one was cited.

designing a cable infrastructure to avoid crosstalk interference