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US 5,856,994 AGranted
Laser-diode-pumped solid-state laser using index-guided type multi-transverse mode broad area laser
AssigneeFuji Photo Film Co., Ltd.
InventorToshiro Hayakawa
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Abstract
A laser-diode-pumped solid-state laser in which a solid-state laser crystal is pumped by a laser beam emitted from a laser diode. An index-guided type multi-transverse mode broad area laser having a single optical waveguide is used as the laser diode. This leads to reduced output variations and noise of the laser. Preferably, the front reflectivity of the laser with respect to the oscillation wavelength of the laser should be more than 20%.
Claims8
A laser-diode-pumped solid-state laser, comprising:
- a pump source producing a pump beam;
- and
- a solid-state laser crystal pumped by the pump beam to emit a laser beam of a given wavelength;
- wherein said pump source comprises an index-guided type multi-transverse mode broad area laser diode having a single optical waveguide.
1 more element
A laser-diode-pumped solid-state laser, comprising:
- a pump source producing a pump beam;
- a solid-state laser crystal pumped by the pump beam to emit a laser beam of a given wavelength;
- a photodetector disposed in a path of the laser beam for detecting the beam and converting the beam into an optical feedback signal;
- and
- an automatic power control circuit for outputting a current in accordance with the optical feedback signal to said pump source as a drive current for said pump source;
- wherein said pump source comprises an index-guided type multi-transverse mode broad area laser diode having a single optical waveguide.
3 more elements
Dependencies are inferred from the claim text.