An optimized method for continuous wave 2-dimensional (2-D) upconversion of incoherent or thermal light is demonstrated and quantified. Using standard resolution targets a resolution of 200×1000 pixels is obtained. The suggested method is viewed in scope of modern CCD cameras operating in the near infrared (NIR) portion of the electromagnetic spectrum. The key is optimization of the upconversion process. This include Quasi-Phase-Matching leading to higher effective nonlinearities and elimination of walk-off, an intra-cavity design enhancing the upconversion process, and finally the use of modern NIR CCD detectors. Furthermore, we discuss the exceptionally good depth of field possible for imaging systems based on the proposed method.
|Journal||Proceedings of the SPIE - The International Society for Optical Engineering|
|Publication status||Published - 2011|
|Event||Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X - San Francisco, CA, United States|
Duration: 24 Jan 2011 → 27 Jan 2011
Conference number: 10
|Conference||Nonlinear Frequency Generation and Conversion|
|City||San Francisco, CA|
|Period||24/01/2011 → 27/01/2011|
Bibliographical note2011 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
- Sum frequency generation
- Infrared imaging
- Thermal imaging