Waveguide type wavelength conversion element

Abstract

Abstract PURPOSE:To increase second harmonic wave generation efficiency by determining the thickness of the uppermost layer having specific or other secondary sensitivity at such a prescribed value which satisfies Cerenkov radiation conditions. CONSTITUTION:A core 3 is embedded in a quartz clad 2 on a silicon substrate 1 except one side thereof and an org. nonlinear material 4 which constitutes a part of the clad layer and has the structure mounted with an org. single crystal having the secondary molecular sensitivity larger than 1X10<30>esu or an org. high polymer having the unit of the sensitivity larger than 1X10<30>esu in the side chain or doped therewith forms the uppermost layer in contact with the layer 2 inclusive of one side of the core 3. The waveguide type wavelength conversion element having the high second harmonic wave generation efficiency utilizing the Cerenkov radiation is obtd. if the thickness of this material 4 is determined so that the equiv. refractive index neff of the light waves guided in the layer 3 calculated by using the refractive indices of the material 4 at the basic wavelength W and the second harmonic wave length 2W, designated as n0W, n0<2>W, satisfies the Cerenkov radiation conditions nW<neff<n0<2>W.

Inventors

• 👤 Yoshito Shudo
• 👤 義人 首藤
• 👤 Takashi Kurihara
• 👤 隆 栗原
• 👤 Michiyuki Amano
• 👤 道之 天野
• 👤 Toshikuni Kaino
• 👤 戒能　俊邦

Bibliographic Details