5 Dye Lasers 195
6. SOLID-STATE DYE LASERS
Solid-state dye lasers were first demonstrated by Softer and McFarland
[139] in 1967 using rhodamine-doped polymethyl methacrylate (PMMA) under
laser excitation. Lasing of rhodamine-doped PMMA under flashlamp excitation
was demonstrated by Peterson and Snavely [140].
Table 18 lists available matrices used in solid-state dye lasers. Modified
PMMA (MPMMA) [141,142] is an improved form of PMMA with high damage
thresholds and excellent optical properties. MPMMA results from purifying the
initial monomer compositions and by doping PMMA with low molecular addi-
tives [142]. Gromov
et al.
[141] report that MPMMA has an energy damage
thresholds of 13 J/cm 2. Further, these authors report that the threshold for photo-
bleaching of rhodamine 6G in MPMMA is -,1.6 J/cm2. Duarte [46] reports that
for a beam radius of 200 ~tm no evidence of photobleaching in rhodamine-doped
MPMMA was evident at energy densities of N0.7 J/cm2. The measured refractive
index for rhodamine-6G-doped MPMMA at a concentration of 0.1 mM is 1.453
at ~, = 594.48 nm.
Gromov
et al.
[141] report that at an incident energy density of 1 J/cm2 photo-
bleaching occurs in 2000 pulses for dye 11B and in 1100 pulses for rhodamine
111. Hermes
et al.
[143] quotes a useful lifetime of more than 20,000 pulses for
PM-570-doped hydroxypropyl acrylate/MMA at an incident energy density of 0.6
J/cm 2.
For ORMOSIL, Duarte
et al.
[45] report on long-pulse lasing under dye
laser excitation. This ORMOSIL was synthesized using the method of Dunn
et
al.
[144] and was composed by a 1:1:1:3.5 molar ratio of TMOS/MMA/3-
(trimethoxysilyl) propyl MA/0.04 N HC1 [145]. The dye concentration used in
TABLE 15 Dispersion Characteristics of Prism Materials for Pulse Compressiona
9~
dnld~, denld'L 2
Material
n (~tm) ([tm -1) (~tm -2)
Reference
Quartz 1.457 0.62 -0.03059 0.1267
BK7 1.51554 0.62 -0.03613 0.15509
F2 1.61747 0.62 -0.07357 0.34332
SF10 1.72444 0.62 -0.10873 0.53819
LaSF9 1.84629 0.62 -0.11189 0.57778
1.83257 0.80 -0.05201 0.18023
ZnSe b 2.586 0.62 -0.698 5.068
2.511 0.80 -0.246 1.163
[lo5]
[87]
[87]
aAdapted from Diels [87], with permission.
bCalculated using data from Marple [ 117].
o~-~
0
0
r
0
..>
~0
I.I.J
_..I
C',l C',I C',l C',l C',l Cxl Cxl C',I {"1
.~~
D
9 - ~~
M ~
0"~ ~ oo ~ ~ I ~ ~t" P'-
0 0 0 0 0 0 0 0 0 0
~J
+
0
o o o o o ,-~ ,.~ ,-~ ,.~ ~ ,.~ ,.~
0
~J
,.,c)
196
0
9
L~
I',,,
iii
~o ~~ ~ ~ ~
~-:
"- ~< ~ ~ ~
~: ~ ~ ~ ..............
< .~
~" ~C) r"-
u'~ ~ u'~ r ~- ~ r'--
o
amaaoa aaa~~
0
~_~~ o :~:
~ ~
- ~ ~8 ~--
.....
r--& ~ b
.~
~e
197

Get Tunable Lasers Handbook now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.