Direct solar pumped laser

Details Direct solar pumped laser Direct solar pumped laser

1979-04-16

1981-07-28

Sikes, William L.

Oscillators

Molecular or particle resonant type

331 945P, H01S 320

Patent

active

042812941

ABSTRACT:
A direct solar pumped laser operates on emission from the phosphorescent T.sub.1 .fwdarw.S.sub.o transition of a suitable dye molecule used in liquid or solid solution. The first excited singlet electronic state S.sub.1 is excited from the ground state S.sub.o by light from solar concentrators absorbed in the absorption bands of the strong spin-allowed transitions S.sub.p .rarw.S.sub.o, p.gtoreq.1, where the primary absorption band is usually p=1. Excitation of dye molecules to the first triplet state T.sub.1 occurs via intersystem crossing from S.sub.1 to the triplet state manifold.

REFERENCES:
patent: 2207656 (1940-07-01), Cartwright et al.
patent: 3451010 (1969-06-01), Maiman
patent: 4004573 (1977-01-01), Frieling et al.
"Transparent Heat Mirrors for Solar-Energy Applications", by Fan et al. Applied Optics vol. 15, No. 4, (Apr. 1976).
"Organic Laser Systems" in Lasers, vol. 1, pp. 203-211, (1966).
"Photon Trapping and Energy Transfer in Multiple-Dye Plastic Matrices: An Efficient Solar-Energy Concentrator", by Swartz et al., Optics Lett., vol. 1, (Aug. 1977).
"Remarks on Negative Absorption" by Rautian et al., Opt. Spect. , vol. 10, pp. 65-66, (Jan. 1967).

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