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Improved output efficiency is obtained from a solid state laser by placing the exciter flash lamp and laser rod in individual compartments separated by a combined optical and thermal filter.
English (United States)
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Laser Cavity Cooling System
Improved output efficiency is obtained from a solid state laser by placing the
exciter flash lamp and laser rod in individual compartments separated by a
combined optical and thermal filter.
Referring to the figure, flash lamp 1 and laser rod 2 are each supported in
respective compartments 3 and 4 of housing 5. A combined optical and thermal
filter 6 mounted in seal 7 separates the two compartments. Filter 6 is fabricated
from glass that blocks most unwanted radiation from the flash tube, and is
formed with an evacuated interior to provide a high impedance to thermal
The flash lamp is supported by seals 8 in the housing and its electrodes 9
extend outside the housing for connection to power. Laser rod 2 with extensions
10 is likewise supported by seals 11. Each compartment has its own inlet 12 and
outlet 13 through which coolant is supplied. Since electrodes 9 are separated
from the cooling medium, the required purity of the coolant is not as stringent.
The optical effect of filter 6 decreases the non contributing pumping energy from
the flash lamp and is primarily effective in the infrared wave lengths.
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