Tim Science Island membuat kemajuan dalam teknologi Q-switching lithium niobate laser infra merah efisiensi tinggi
Baru-baru ini, kelompok penelitian Jiang Haihe, seorang peneliti di Laboratorium Teknologi Laser Medis dari Institut Kesehatan, Institut Penelitian Hefei dari Akademi Ilmu Pengetahuan China, bekerja sama dengan Grup Teknologi Elektronik China, dan membuat kemajuan penting dalam penelitian akustik- teknologi Q-switching optik pada pita inframerah menengah: untuk pertama kalinya, kristal lithium niobate (LiNbO3) telah direalisasikan. Sakelar acousto-optik dan output Q-switched efisiensi tinggi dalam laser 2,79 μm Er,Cr:YSGG. Hasil yang relevan telah diterbitkan dalam jurnal optik internasional Optics Letters.
Lithium niobate crystal is a traditional multifunctional crystal. In recent years, lithium niobate thin-film photonic devices with extremely low optical loss and rich photoelectric functions have developed rapidly. Lithium niobate is expected to replace silicon materials in the field of integrated photonics. Problems provide solutions. Since the discovery of lithium niobate crystal in 1937, although it has good acousto-optic properties and has been used as a transducer material for a long time, it has not been able to realize the laser acousto-optic Q-switching switch of bulk crystals. This research has realized the homogeneity and integration of the acousto-optic medium and the transducer, which can simplify the manufacturing process, reduce the auxiliary cost, and also reduce the loss of ultrasonic energy, so that the diffraction efficiency of the lithium niobate Q-switch can reach 57%. And the lithium niobate crystal has a high damage resistance threshold (>200 MW/cm2).
