Coherent light generators – Particular pumping means – Pumping with optical or radiant energy
Patent
1998-03-27
2000-08-15
Bovernick, Rodney
Coherent light generators
Particular pumping means
Pumping with optical or radiant energy
385 11, 385 33, 385 36, 359494, 359495, H01S 3091, G02B 600, G02B 632, G02B 634
Patent
active
061047414
ABSTRACT:
A semiconductor laser light source includes: a semiconductor laser array which emits laser beams whose polarization planes are parallel to each other and whose divergent angles .theta.z and .theta.x in two orthogonal directions satisfy an inequality .theta.z>.theta.x; a cylindrical lens which converges the laser beams emitted from the semiconductor laser array in a direction that decreases the divergent angle .theta.z; a wave plate which controls the direction of polarization so that the polarization planes of the laser beams having passed through the cylindrical lens are at 90 degrees to each other; a birefringent optical element which merges by the birefringent effect the optical paths of the laser beams having passed through the wave plate; and a light emitting surface which converges the laser beams merged by the birefringent optical element in a direction that decreases the divergent angle .theta.x.
Thus, the efficiency of merging the laser beams and the efficiency of joining the laser beams to the succeeding optical system can be greatly improved.
REFERENCES:
patent: 4253735 (1981-03-01), Kawamura et al.
patent: 5533152 (1996-07-01), Kessler
patent: 5612969 (1997-03-01), Dombi
"Scalable, end-pumped, diode-laser-pumped laser", T.Y. Fan, A. Sanchez, and W.E. DeFeo, Optics Letters, vol. 14, Oct. 1, 1989, pp. 1057-1059, XP000068907.
Igarashi Kouichi
Muro Kiyofumi
Oeda Yasuo
Bovernick Rodney
Leung Quyen Phan
Mitsui Chemicals Inc.
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