Frequency up-conversion imaging with 60-dB gain using picosecond optical parametric amplifier

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（11）
• 页码范围: 68-71
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201311.111901.

摘要

A weak infrared (IR) image amplifier with more than 60-dB optical gain and frequency up-conversion is developed from a picosecond (PS) 355-nm pumped gated optical parametric amplifier (OPA) in aβBaB2O4 (BBO) crystal.The IR image at 1064 nm is amplified and up-converted into the visible region at 532 nm by parametric amplification and up-conversion.With the optimized optical gain,the lowest detectable energy of the image can be as low as 1.8 femto-Joule per pulse,which is three orders of magnitude lower than the detection limit of a charge-coupled device (CCD) camera.The transversal resolution of the OPA imaging is investigated,and the approaches for higher detection sensitivity and higher transversal resolution are proposed.