Hô Nicolas, Laniel Jacques M, Vallée Réal, Villeneuve Alain
Centre d'Optique Photonique et Laser, Université Laval, Quebec G1K7P4, Canada.
Opt Lett. 2003 Jun 15;28(12):965-7. doi: 10.1364/ol.28.000965.
Chalcogenide glasses are promising candidates for all-optical switching and various nonlinear applications. However, we show that As2S3 thin films are photosensitive at wavelengths in the 1.5-microm telecommunication window. This sensitivity is evidenced by the formation of self-written waveguides in slabs, where channels as narrow as 1 microm are created. We also show the detrimental effects of such photosensitivity in ridge waveguides. This photosensitivity seems to occur only in thin-film form and not in bulk samples or fibers.
硫族化物玻璃是全光开关和各种非线性应用的理想候选材料。然而，我们发现As2S3薄膜在1.5微米电信窗口波长处具有光敏性。这种光敏性通过在平板中形成自写波导得到证明，在平板中可以创建窄至1微米的通道。我们还展示了这种光敏性在脊形波导中的有害影响。这种光敏性似乎仅在薄膜形式中出现，而在块状样品或光纤中不会出现。
