A simple model for 2D image upconversion of incoherent light

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We present a simple theoretical model for 2 dimensional (2-D) image up-conversion of incoherent light. While image upconversion has been known for more than 40 years, the technology has been hindered by very low conversion quantum efficiency (~10-7). We show that our implementation compared to previous work can result in a feasible system: Using intracavity upconversion and Quasi Phase Matching (QPM) nonlinear materials provide increased conversion efficiency. Using a QPM crystal and choosing the wavelengths so the first order term in the phasematch wavelength acceptance vanishes, results in very large wavelength acceptance. This work describes how the bandwidth acceptance can be predicted and designed. This gives promise of a new way to make infrared imaging devices with tunable spectral sensitivity.
Original languageEnglish
JournalProceedings of the SPIE - The International Society for Optical Engineering
Pages (from-to)791714
Publication statusPublished - 2011
EventNonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X - San Francisco, CA, United States
Duration: 24 Jan 201127 Jan 2011
Conference number: 10


ConferenceNonlinear Frequency Generation and Conversion
Country/TerritoryUnited States
CitySan Francisco, CA

Bibliographical note

2011 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.


  • Infrared
  • Sum Frequency Generation
  • Upconversion
  • Thermal imaging


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