Answer
That radiation is found in the infrared portion of the electromagnetic spectrum.
Work Step by Step
A diode laser emits at a wavelength: $\lambda=987nm=9.87\times10^{-7}m$.
A radiation with a wavelength like that lies in the infrared portion of the electromagnetic spectrum, whose wavelength range is from $7.5\times10^{-7}m$ to over $10^{-4}m$.