Coherent light generators – Particular pumping means – Pumping with optical or radiant energy
Patent
1991-11-12
1994-09-13
Epps, Georgia Y.
Coherent light generators
Particular pumping means
Pumping with optical or radiant energy
372 69, H01S 3093
Patent
active
RE0347299
ABSTRACT:
An optically pumped single mode laser, e.g. Nd:YAG crystal (20) with planoconcave mirrors is increased in efficiency by an order of magnitude to about 8% by optics (25, 27) for focusing the high power multimode output of laser diode arrays (21, 22) into the mode volume (20') of the laser medium (20). A plurality of these optically pumped single mode lasers (1-4) may be cascaded in a ring with dichroci mirrors (M.sub.1 -M.sub.4) at the corners for coupling in the laser diode arrays, each having its own means for spatially tailoring its beam to concentrate pump distribution inside the lasing mode volume of the medium. An InGaAlAs pump diode (30) with its wavelength of the same as a lasing medium makes the ring unidirectional.
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K. Kubodera &
California Institute of Technology
Epps Georgia Y.
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