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US 5,212,710 AGranted
Laser light beam synthesizing apparatus
AssigneeSony Corporation
InventorsYushi Kaneda, Michio Oka
Life of this patent
Estimating the term…
Abstract
A laser light source in which a couple of light beams whose shapes are re-formed and whose polarizing planes are made perpendicular to each other are synthesized by a beam splitter and then the synthesized light is incident on an optical guide through a predetermined optical system, thereby generating the synthesized light having a short spot diameter and an improved power density.
Claims31
A laser light source comprising:
- a first light source for emitting a first light beam having a shape in cross-section of a flat ellipse;
- a second light source for emitting a second light beam having a shape in cross-section of a flat ellipse;
- first beam shape re-form means for re-forming the cross-sectional beam shape of the first light beam from a flat ellipse to a more circular ellipse;
- second beam shape re-form means for re-forming the cross-sectional beam shape of the second light beam from a flat ellipse to a more circular ellipse;
- polarizing means for polarizing the second light beam with respect to the first light beam such that the polarizing plane of a light beam emitted from said first beam shape re-form means is oriented at an angle of 90 degrees with respect to the polarizing plane of a light beam emitted from the second beam shape re-form means;
- and
- beam synthesizing means for synthesizing the light beam outputted from the first beam shape re-form means and a light beam outputted from the polarizing means, which is supplied thereto with an incident angle deviated by an angle of 90 degrees relative to the incident angle of the first light beam, to produce a synthesized light beam.
4 more elements
A laser light source comprising:
- a first light source for emitting a first light beam having a cross-sectional shape of a flat ellipse;
- second light source for emitting a second light beam having a cross-sectional shape of a flat ellipse, the polarizing plane of which is different by an angle of 90 degrees relative to the polarizing plane of the first light beam;
- first beam shape re-forming means for reforming the cross-sectional beam shape of the first light beam to be a more circular ellipse;
- second beam shape re-forming means for re-forming the cross-sectional beam shape of the second light beam to be a more circular ellipse;
- and
- beam synthesizing means for synthesizing a light beam outputted from the first beam shape re-forming means and a light beam supplied from the second beam shape re-forming means with an incident angle different by 90 degrees relative to that of the first light beam to produce a synthesized light beam.
3 more elements
A solid-state laser device comprising:
- a first light source for emitting a first light beam;
- a second light source for emitting a second light beam;
- a first beam shape reforming means for reforming the cross-sectional beam shape of the first light beam to have a more circular cross-section;
- a second beam shape reforming means for reforming the beam shape of the second light beam to have a more circular cross-section;
- polarizing means for polarizing a light beam outputted from the second beam shape reforming means such that the polarizing plane of the light beam emitted from the second beam shape reforming means is oriented at an angle of 90 degrees relative to the polarizing plane of a light beam emitted from the first beam shape reforming means;
- beam synthesizing means for synthesizing a light beam outputted from the first beam shape re-forming means and a light beam outputted from the polarizing means, which is supplied thereto with an incident angle different by an angle of 90 degrees relative to the incident angle of the first light beam, to produce a synthesized light beam;
- and
- at least one optical fiber which is supplied with the synthesized light beam outputted from the beam synthesizing means;
- wherein a light beam outputted from the at least one optical fiber is supplied to a laser medium to generate a laser light.
6 more elements
A solid-state laser device comprising:
- a light source, including:
- a first light source for emitting a first light beam;
- a second light source for emitting a second light beam, the polarizing plane of which is different by an angle of 90 degrees relative to the polarizing plane of the first light beam;
- first beam shape re-forming means for reforming the cross-sectional beam shape of the first light beam to have a more circular cross-section;
- second beam shape re-forming means for reforming the cross-sectional beam shape of the second light beam to have a more circular cross-section;
- beam synthesizing means for synthesizing a light beam outputted from the first beam shape re-forming means with a light beam output from the second beam shape re-forming means which is supplied with an incident angle different by an angle of 90 degrees relative to the incident angle of the first light beam;
- and
- at least one optical fiber which is supplied with a light beam outputted from the beam synthesizing means,
- a laser medium;
- and
- wherein a light beam outputted from the at least one optical fiber is supplied to the laser medium to generate a laser light.
8 more elements
Dependencies are inferred from the claim text.