Patent ID: 8754398

Claim:
A light-emitting diode, comprising: a light emitting section including an active layer having a quantum well structure in which well layers having the composition: (In X1 Ga 1-X1 )As and barrier layers having the composition: (Al X2 Ga 1-X2 )As (0<X2≦1) are alternately laminated, a first guide layer and a second guide layer which are paired to sandwich the active layer and have the composition: (Al X3 Ga 1-X3 )As (0≦X3≦1), and a first cladding layer and a second cladding layer which are paired to sandwich the active layer via the first guide layer and the second guide layer, respectively; a current diffusion layer formed on the light emitting section; and a functional substrate bonded to the current diffusion layer; wherein the first cladding layer and the second cladding layer have the composition: (Al X4 Ga 1-X4 ) Y In 1-Y P (0<X4<1, 0<Y≦1), and an emission peak wavelength is 900 nm or more and 985 nm or less.