Amplified Spontaneous Emission of the Iodine B 3Pi(O(+) sub u) X 1 Sigma (O(+) sub g) System
Abstract
Amplified spontaneous emission (ASE) via optical excitation of molecular iodine has been studied. Rotationally resolved excitation and emission spectroscopy over the entire B-X manifold was investigated. The relative reduction of ASE output energy through collisional losses was studied for various buffer gases. A parametric study of output performance, including gain and conversion efficiency, was also performed. ASE was observed for the pump wavelength range 604-514 nm. This wavelength range produced excited I2(B) with vibrational excitation of v' = 7-44. Subsequent emission to the I2(X) state occurred to the vibrational levels v'= 38-84. Emission for these transitions occurred in the wavelength range of 1.07-1.34 micro. The rotational dependence of the ASE showed two distinct regions. The normal emission intensity varied with the rotational Boltzmann population distribution with a threshold requirement, with emission over the region of 25 < or = J < or = 85. The spike emission displayed an abnormally strong signal near the pump bandhead. Also, spike emission consisted of a single line rather than doublet emission.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1987
- Accession Number
- ADA182590
Entities
People
- John W. Glessner
Organizations
- Air Force Institute of Technology