Daniel Jaque, "Optimum conditions for ultraviolet-laser generation based on self-frequency sum mixing in Nd3+-activated borate crystals," J. Opt. Soc. Am. B 19, 1326-1334 (2002)
A simple theoretical model of the ultraviolet laser radiation generated by self-frequency sum mixing in a single argon-pumped -doped nonlinear crystal is proposed. Self-absorption by both absorption edge and bands lying in the ultraviolet range is taken into account. The model is then applied to
and borate laser crystals. The crystal length, pump wavelength, and concentration that optimize the pump to ultraviolet efficiency are determined for each case. The ultraviolet output power is found to be tens of milliwatts for a pump power of 2 W.
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SFSM Phase-Matching Angles Obtained for NYAB and NYCOB Crystals As a Function of Argon Wavelength and
Ion Oscillating Channel
(nm)
NYAB Crystal
NYCOB Crystal
Transition
Wavelength (nm)
Phase-Matching Angle (°)
Transition
Wavelength (nm)
Phase-Matching Angle (°)
514.5
501.7
Not allowed
496.5
Not allowed
488
Not allowed
Table 2
Ultraviolet Wavelength As a Function of Pump and IR, Laser Wavelengths for SFSM in NYABa
(nm)
(nm)
(nm)
(cm-1/at. %)
(cm-1/at. %)
(cm-1)
514.5
1062
346.6
0.143
0.006
0.513
501.7
1062
340.7
0.012
0
0.576
496.5
1062
338.3
0.005
0
0.645
488
1062
334.3
0.012
0
0.684
514.5
1338
371.6
0.143
0.019
0.299
501.7
1338
364.9
0.012
0.041
0.345
496.5
1338
362.1
0.005
0.173
0.351
488
1338
357.6
0.012
0.154
0.38
ultraviolet;
pump;
infrared wavelengths. Also shown is the
absorption cross section for pump
and UV
radiation as well as the absorption coefficient for UV radiation that is due to the presence of the NYAB absorption edge
Table 3
Nonlinear Coefficient ,
Dependence of the Fluorescence Lifetime of the Metastable State
Stimulated-Emission Cross Sections That Correspond to the Two Main IR Channels,a
and Internal Optical Loss Factor
for NYAB and NYCOB Crystals
Ultraviolet Wavelength As a Function of Pump and IR Laser Wavelengths for SFSM in NYCOBa
(nm)
(nm)
(nm)
(cm-1/at. %)
(cm-1/at. %)
(cm-1)
514.5
1060
346.4
0.296
0.020
0.33
501.7
1060
340.5
0.040
0.012
0.380
496.5
1060
338.1
0.012
0.011
0.396
488
1060
334.1
0.005
0.023
0.424
514.5
1332
371.1
0.296
0.006
0.211
501.7
1332
364.4
0.040
0.097
0.242
496.5
1332
361.7
0.012
0.239
0.254
488
1332
357.1
0.005
0.189
0.273
ultraviolet;
pump;
infrared wavelengths. Also shown is the
absorption cross section for pump
and UV
radiation as well as the absorption coefficient for UV radiation that is due to the presence of the NYCOB absorption edge
Tables (4)
Table 1
SFSM Phase-Matching Angles Obtained for NYAB and NYCOB Crystals As a Function of Argon Wavelength and
Ion Oscillating Channel
(nm)
NYAB Crystal
NYCOB Crystal
Transition
Wavelength (nm)
Phase-Matching Angle (°)
Transition
Wavelength (nm)
Phase-Matching Angle (°)
514.5
501.7
Not allowed
496.5
Not allowed
488
Not allowed
Table 2
Ultraviolet Wavelength As a Function of Pump and IR, Laser Wavelengths for SFSM in NYABa
(nm)
(nm)
(nm)
(cm-1/at. %)
(cm-1/at. %)
(cm-1)
514.5
1062
346.6
0.143
0.006
0.513
501.7
1062
340.7
0.012
0
0.576
496.5
1062
338.3
0.005
0
0.645
488
1062
334.3
0.012
0
0.684
514.5
1338
371.6
0.143
0.019
0.299
501.7
1338
364.9
0.012
0.041
0.345
496.5
1338
362.1
0.005
0.173
0.351
488
1338
357.6
0.012
0.154
0.38
ultraviolet;
pump;
infrared wavelengths. Also shown is the
absorption cross section for pump
and UV
radiation as well as the absorption coefficient for UV radiation that is due to the presence of the NYAB absorption edge
Table 3
Nonlinear Coefficient ,
Dependence of the Fluorescence Lifetime of the Metastable State
Stimulated-Emission Cross Sections That Correspond to the Two Main IR Channels,a
and Internal Optical Loss Factor
for NYAB and NYCOB Crystals
Ultraviolet Wavelength As a Function of Pump and IR Laser Wavelengths for SFSM in NYCOBa
(nm)
(nm)
(nm)
(cm-1/at. %)
(cm-1/at. %)
(cm-1)
514.5
1060
346.4
0.296
0.020
0.33
501.7
1060
340.5
0.040
0.012
0.380
496.5
1060
338.1
0.012
0.011
0.396
488
1060
334.1
0.005
0.023
0.424
514.5
1332
371.1
0.296
0.006
0.211
501.7
1332
364.4
0.040
0.097
0.242
496.5
1332
361.7
0.012
0.239
0.254
488
1332
357.1
0.005
0.189
0.273
ultraviolet;
pump;
infrared wavelengths. Also shown is the
absorption cross section for pump
and UV
radiation as well as the absorption coefficient for UV radiation that is due to the presence of the NYCOB absorption edge