Accession Number : ADA600334


Title :   Iron-Doped Zinc Selenide: Spectroscopy and Laser Development


Descriptive Note : Doctoral thesis


Corporate Author : AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT


Personal Author(s) : Evans, Jonathan W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a600334.pdf


Report Date : 27 Mar 2014


Pagination or Media Count : 137


Abstract : We examine the quantum mechanics of optically active ions in crystals. Insight is developed which qualitatively explains the shape of the optical absorption and emission spectra of Fe2+ ions in II?VI materials. In addition to a discussion of the relevant theory, this work explores experimental techniques for absorption spectroscopy, laser-induced fluorescence spectroscopy, and upper-state lifetime measurements in detail. The data collected from these experiments are interpreted in the context of the theories developed herein. The theory and data are used to develop a simple model of the temperature dependence of the upper-state lifetime of Fe2+ ions in ZnSe. We report the demonstration of high-power continuous wave (CW) laser oscillation from Fe2+ ions in zinc selenide in detail. Broadband wavelength tuning of an Fe:ZnSe laser is demonstrated using spectrally selective intracavity optics. Additionally, several resonator configurations were briefly tested with the significant result that 1 W power was achieved near 4100 nm. We report the use of pulsewidth modulation techniques to deliver short, high-peak-power pulses from an Fe:ZnSe laser. The first passively Q-switched Fe:ZnSe laser was successfully demonstrated with average power 600 mW and with pulse widths 60 ns. Additionally, the first modelocked Fe:ZnSe laser was successfully demonstrated with average power of 200 mW.


Descriptors :   *INFRARED SPECTROSCOPY , *LASERS , *ZINC SELENIDES , CONTINUOUS WAVES , LASER INDUCED FLUORESCENCE , QUANTUM THEORY , TEST METHODS , TRANSITION METALS


Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE