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Laser discrimination by stimulated emission of a phosphor
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Chakrabarti, K. Mathur, V. K. |
| Copyright Year | 1991 |
| Description | A method for discriminating sources of UV, near infrared, and far infrared laser radiation was discovered. This technology is based on the use of a single magnesium sulfide phosphor doubly doped with rare earth ions, which is thermally/optically stimulated to generate colors correlatable to the incident laser radiation. The phosphor, after initial charging by visible light, exhibits green stimulated luminescence when exposed to a near infrared source (Nd: YAG laser). On exposure to far infrared sources (CO2 laser) the phosphor emission changes to orange color. A UV laser produces both an orange red as well as green color. A device using this phosphor is useful for detecting the laser and for discriminating between the near infrared, far infrared, and UV lasers. The technology is also capable of infrared laser diode beam profiling since the radiation source leaves an imprint on the phosphor that can be photographed. Continued development of the technology offers potential for discrimination between even smaller bandwidths within the infrared spectrum, a possible aid to communication or wavemixing devices that need to rapidly identify and process optical signals. |
| File Size | 324318 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920013235 |
| Archival Resource Key | ark:/13960/t07x19513 |
| Language | English |
| Publisher Date | 1991-12-01 |
| Access Restriction | Open |
| Subject Keyword | Lasers And Masers Communication Equipment Laser Outputs Ultraviolet Lasers Yag Lasers Luminescence Color Laser Beams Magnesium Compounds Near Infrared Radiation Far Infrared Radiation Sulfides Stimulated Emission Doped Crystals Semiconductor Lasers Rare Earth Elements Phosphors Optical Communication Incident Radiation Infrared Lasers Signal Processing Carbon Dioxide Lasers Metal Ions Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
