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Master's Dissertation
DOI
10.11606/D.54.1986.tde-08062009-093329
Document
Author
Full name
Germano Woehl Junior
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1986
Supervisor
Committee
Li, Maximo Siu (President)
Terrile, Maria Cristina
Zimmerman, Robert Lee
Title in Portuguese
Construção de um laser de centro de cor para aplicações em espectroscopia.
Keywords in Portuguese
Cristais haleto alcalinos
Espectroscopia
Laser de centro de cor
Abstract in Portuguese
O objetivo deste trabalho é o desenvolvimento de um laser de centro de cor para aplicações em espectroscopia. O laser opera em regime CW e a cavidade óptica utilizada é do tipo X, com dois espelhos esféricos intracavidade astigmáticamente compensados. O meio ativo utilizado foi um cristal de KCl:Li+ com centros FA (II), e como fonte de bombeamento foi empregado um laser de Ar+ em 514nm. O limiar de potência de bombeamento foi de 120 mW, a eficiência energética foi de 2,8% e o intervalo de sintonia obtido vai de 2,56 a 2,82 μm numa potência de bombeamento de 700mW. O laser opera também com a cavidade na configuração anel. Para testar o LCC foram feitas aplicações empregando a técnica de espectroscopia intercavidade em cristais de KCl: Li+: NO-2: NO-3 e KBr:OH-.
Title in English
Development of a color center laser for spectroscopy application.
Keywords in English
Alkali Halide Crystals
Color center laser
Near infrared spectroscopy
Tunable laser
Abstract in English
The present work shows the development of a color Center laser for spectroscopy application. It is a CW laser which uses an X-type cavity with two astigmatically compensated intracavity spherical mirrors. The laser can be converted to a ring laser. The used active medium was a KCl:Li+ single crystal with a FA (II) centers and the pumping source was an Ar+ laser (λ= 514nm, 700mW). Pump power at threshold was measured to be 120mW. The tuning range was 2.56< λ < 2.82 μm and the slope efficiency was 2,8%. To test the color center laser we measured intracavity spectra of KCl: Li+: NO-2: NO-3 and KBr:OH- single crystals.
 
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Publishing Date
2009-06-15
 
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