US 5,315,433 A · Optical wavelength converting apparatus

Abstract

In an optical wavelength converting apparatus, a fundamental wave impinges upon a crystal of a nonlinear optical material, the type II of phase matching between the fundamental wave and its second harmonic is effected, and the second harmonic of the fundamental wave is thereby radiated out of the optical wavelength converting apparatus. Two crystals constituted of the same material are employed as the crystal. The two crystals have equal lengths and are located in orientations such that corresponding optic axes may be shifted 90.degree. from each other. The optical wavelength converting apparatus yields the second harmonic having the maximum possible output power and yet can be kept small in size and low in cost.

Claims9

Dependent claims

An optical wavelength converting apparatus in which a crystal structure formed of nonlinear optical material is provided to receive a fundamental wave and to emit a second harmonic of the fundamental wave, said structure being formed and oriented for type II phase matching between the fundamental wave and the second harmonic,

said structure comprising two crystals, each formed of said optical material, and together forming said crystal structure, wherein said two crystals have substantially equal lengths and are oriented with respect to each other such that corresponding optic axes of said crystals are shifted substantially 90.degree. from each other.

Dependencies are inferred from the claim text.

Optical wavelength converting apparatus

Life of this patent

Optical wavelength converting apparatus

Life of this patent

Abstract

Claims9