Speckle random pattern laser: Self-formation of looped lasing paths and dynamic effects in a wide-aperture thin-slice solid-state laser

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.065801· OSTI ID:21000562

Otsuka, Kenju; Miyasaka, Yoshihiko ^[1]; Nemoto, Kana ^[2]

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1. Department of Human and Information Science, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259-1292 (Japan)
2. Department of Physics, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259-1292 (Japan)

We observed self-formation of looped random lasing paths in a laser-diode-pumped wide-aperture thin-slice solid-state laser with imperfect reflective end surfaces. Observed lasing patterns, resulting from random scatterers on the surfaces, showed transverse intensity distributions possessing exponential spatial autocorrelation functions. It is shown that such a speckle type of lasing pattern formation takes place when the pump position is tuned such that the surface irregularity possesses an exponential autocorrelation function whose delay length is smaller than the lasing beam diameter.

• OSTI ID: 21000562
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APERTURES
CORRELATION FUNCTIONS
CORRELATIONS
DISTRIBUTION
PUMPING
RANDOMNESS
SEMICONDUCTOR LASERS
SURFACES