Selective Photon Light Pipe Experiments
Abstract
A feasibility study of using a combustion-driven light source to pump a 1540 nm eye-safe phosphate glass fiber laser was performed. The proposed laser pumping concept consists of a 980 nm narrow-band ytterbia selective emitter and a transparent sapphire filament light pipe that transfers the light to an eye-safe erbium-doped ytterbium phosphate fiber laser. The maximum radiant exitance and irradiance of the selective emitter light pipes (SELP) were analyzed and experimentally determined. The maximum irradiance with ytterbia SELP, to date, is at 9.7 W/sq cm with 32.4 mW power output measured on a 425 micrometers sapphire light pipe. The ytterbia SELP is currently below the pumping irradiance threshold of 11 (optimistic) to 35 W/sq cm for the phosphate glass double-clad fiber laser. A new double-clad two stage fiber laser pumped by neodymium SELP was identified as an alternative design.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 2000
- Accession Number
- ADA384286
Entities
People
- Daniel J. Krommenhoek
- Kevin C. Chen
- Pedro Sarmiento
- Ray Beach
- Steve Payne