Page 263 - Handbook of Lasers

1.4.2 Centers and Crystals for Color Center Lasers
Color centers are formed by one or more vacancies in a crystal; the vacancy may also be
accompanied by nearby foreign ions. The simple F center (an electron trapped at an anion
vacancy) and several more complex aggregated centers are depicted by the structural models
+
in Figure 1.4.2. Other centers, such as a F center for example, consist of two electrons
3
bound to three neighboring anion vacancies. Principal centers and crystalline hosts used for
color center lasers are summarized in Table 1.4.1.

Table 1.4.1
Principal Centers and Crystals Used for Color Center Lasers

(a)
Center Crystal Center Crystal*
+
F 2 LiF (F ) AH KCl:Na +
2
F 2 + KBr (F ) CaF :Na +
2 A
2
KCl MgF 2 :Na +
KF SrF 2 :Na +
LiF
LiF:OH - F 2 + :O 2- KCl:Na +
-
LiF:OH ,Mg 2+ NaCl:OH -
NaCl
NaCl:OH - F 2 + :S 2- NaCl
NaF
F 3 + LiF
F 2 - LiF
F 3 - LiF
+
(F )* NaF:Mg 2+
2
F A (II) KCl:Li +
+ LiF +
(F 2 )** RbCl:Li
+
o
(F ) A KCl:Li + F A :Tl (1) KCl:Tl +
2
KCl:Na +
KI:Li + F B (II) KCl:Na +
NaF:Li +
o
RbI:Li + Tl (1) KBr:Tl +
KCl:Tl +
+ - +
(F 2 ) H NaCl:OH KF:Tl
NaCl:Tl +

(a) Dopants are given after the colon.

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