Spectral Matching of Nd<bold>∶</bold>YAG, Cr<bold>∶</bold>Nd<bold>∶</bold>YAG and Ce<bold>∶</bold>Nd<bold>∶</bold>YAG Laser Materials Under Solar Pumping

Property	Value
Melting point /℃	1970
Thermal conductivity at 300 K /（W∙cm^-1∙K^-1）	0.14
Stimulated emission cross-section of ⁴F_3/2→⁴I_11/2 transition $σ_{21}$ /cm²	2.8×10^-19
Fluorescence lifetime /μs	230
Scattering loss $α_{s c}$ /cm^-1	0.002

Table 2. Solar spectral total irradiance of analyzed band
View table
Table 2. Solar spectral total irradiance of analyzed band
Type of solar
spectrum
AM0 AM1.5
Direct normal
irradiance
Hemispherical
tilted irradiance
Total irradiance 1320.46 900.17 1000.40

Table 3. Overlapping efficiency calculation of laser materials’ absorption spectra and solar spectrum

View table

Table 3. Overlapping efficiency calculation of laser materials’ absorption spectra and solar spectrum

Laser material	Absorption band /nm	AM1.5 spectral analysis			AM0 spectral analysis
Laser material	Absorption band /nm	$\int_{λ_{i}}^{λ_{j}} P_{λ} d λ$ / （W·m^-2）	$\sum \int_{λ_{i}}^{λ_{j}} P_{λ} d λ$ / （W·m^-2）	$η_{P}$ /%	$\int_{λ_{i}}^{λ_{j}} P_{λ} d λ$ / （W·m^-2）	$\sum \int_{λ_{i}}^{λ_{j}} P_{λ} d λ$ / （W·m^-2）	$η_{P}$ /%
Nd∶YAG	515-540	37.955	173.378	17.34	46.355	203.121	15.40
	565-595	44.434			56.491
	735-765	32.438			37.941
	795-825	29.934			33.297
	855-885	28.617			29.037
Cr∶Nd∶YAG	400-490	123.894	355.677	35.55	166.711	437.512	33.13
	515-540	37.955			46.355
	560-630	102.839			124.171
	735-765	32.438			37.941
	795-825	29.934			33.297
	855-885	28.617			29.037
Ce∶Nd∶YAG	315-365	21.245	334.202	33.41	44.731	434.737	32.92
	400-500	139.579			186.222
	515-540	37.955			46.355
	565-595	44.434			56.491
	735-765	32.438			37.941
	795-825	29.934			33.297
	855-885	28.617			29.037

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Jia Zhang, Changming Zhao, Zitao Cai, Ziyin Zhao. Spectral Matching of Nd∶YAG, Cr∶Nd∶YAG and Ce∶Nd∶YAG Laser Materials Under Solar Pumping[J]. Chinese Journal of Lasers, 2023, 50(13): 1301002

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