Pasukan Pulau Sains membuat kemajuan dalam teknologi penukar Q litium niobate berkecekapan tinggi laser inframerah pertengahan
Baru-baru ini, kumpulan penyelidik Jiang Haihe, seorang penyelidik di Makmal Teknologi Laser Perubatan Institut Kesihatan, Institut Penyelidikan Hefei Akademi Sains China, bekerjasama dengan China Electronics Technology Group, dan membuat kemajuan penting dalam penyelidikan acousto- teknologi pensuisan Q optik dalam jalur inframerah pertengahan: buat kali pertama, kristal litium niobate (LiNbO3) telah direalisasikan. Suis acousto-optik dan output suis-Q berkecekapan tinggi dalam laser Er,Cr:YSGG 2.79 μm. Keputusan yang berkaitan telah diterbitkan dalam jurnal optik antarabangsa 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).
