Energy transition characterization of 1.18 and 1.3 {mu}m bands of bismuth fiber by spectroscopy of the transient oscillations

Journal Article · Mon May 09 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3590266· OSTI ID:21518425

Gumenyuk, Regina; Okhotnikov, Oleg G ^[1]; Golant, Konstantin; Golant, Konstantin ^[2]; Gumenyuk, Regina; Okhotnikov, Oleg G ^[3]

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1. Optoelectronics Research Centre, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere (Finland)
2. Kotel'nikov Institute of Radioengineering and Electronics, Russian Academy of Science, Mokhovaya 11, bld.7, 125009 Moscow (Russian Federation)
3. Optoelectronics Research Centre, Tampere University of Technology, P.O. Box 692, FIN-333101 Tampere (Finland)

The experimental evidence of laser transition type in bismuth-doped silica fibers operating at different spectral bands is presented. Spectrally resolved transient (relaxation) oscillations studied for a Bi-doped fiber laser at room and liquid-nitrogen temperatures allow to identify the three- and four-level energy bands. 1.18 {mu}m short-wavelength band is found to be a three-level system at room temperature with highly populated terminal energy level of laser transition. The depopulation of ground level by cooling the fiber down to liquid-nitrogen temperature changes the transition to four-level type. Four-level energy transition distinguished at 1.32 {mu}m exhibits the net gain at room temperature.

• OSTI ID: 21518425
• Journal Information: Applied Physics Letters, Vol. 98, Issue 19; Other Information: DOI: 10.1063/1.3590266; (c) 2011 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
BISMUTH
BISMUTH ADDITIONS
COOLING
DOPED MATERIALS
ENERGY LEVELS
FIBERS
GAIN
GLASS
GROUND LEVEL
LASER RADIATION
OSCILLATIONS
RELAXATION
SILICA
SPECTROSCOPY
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TRANSIENTS
WAVELENGTHS
ALLOYS
AMPLIFICATION
BISMUTH ALLOYS
ELECTROMAGNETIC RADIATION
ELEMENTS
LEVELS
MATERIALS
METALS
MINERALS
OXIDE MINERALS
RADIATIONS
TEMPERATURE RANGE