The theory of continuous wave difference frequency generation (DFG) is studied for a mixing of two waves in a nonlinear medium, the absorption effect of the material is included and optimization conditions are studied. Trace concentrations of nitric oxide were observed in a mixture of ambient air using a DFG source with periodically poled lithium niobate (PPLN) as the nonlinear medium. A sensitivity of 300 ppb was achieved. The design and development of a fiber-coupled DFG sensor are reported. This sensor applied to the observation of carbon monoxide.
| Identifer | oai:union.ndltd.org:RICE/oai:scholarship.rice.edu:1911/17166 |
| Date | January 1998 |
| Creators | Li, Di |
| Contributors | Tittel, F. K. |
| Source Sets | Rice University |
| Language | English |
| Detected Language | English |
| Type | Thesis, Text |
| Format | 66 p., application/pdf |
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