US5384796A
Expired / Lapsed
US
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Second harmonic generating method and apparatus thereof
Assignee: Samsung Electronics Co Ltd
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Filing: 1993-10-06
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Granted: 1995-01-24
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Expires: 2013-10-06
Abstract
Abstract A method and apparatus for second harmonic generation of laser light includes a non-linear birefringent crystalline element and a dynamic laser rod which has two transmission faces and an optical axis, the face of the dynamic laser rod facing the non-linear birefringent crystalline element being inclined at an angle to the optical axis of the dynamic laser rod so that the optical axis of the birefringent crystalline element forms a Brewster angle with a normal to the inclined face of the dynamic laser rod. Thus, the internal space occupied by the second harmonic generating apparatus is reduced and the supporting structure is miniaturized.
Inventors
- 👤 Seong-gil Jee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:58
CPC Classifications
H; H03; H03H; H03H3/00; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/108; H01S3/109; H01S3/05; H01S3/06; H01S3/0602; H01S3/061; H01S3/0615; H01S3/09; H01S3/091; H01S3/094; H01S3/0941; H01S3/09415
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
216 words
A second harmonic generating method comprising: arranging a dynamic laser rod having an optical axis with an inclined face forming an angle θ P , with respect to the optical axis of the dynamic laser rod so that ##EQU4## wherein θ B is the Brewster angle and η laser is the refractive index of the dynamic laser rod and an opposite face through which laser pumping light is received; and arranging an optical axis of a non-linear birefringent crystalline element to form the Brewster angle with a normal to the inclined face of the dynamic laser rod whereby light from the dynamic laser rod incident on the non-linear birefringent crystalline element is polarized perpendicular to the optical axis of the non-linear birefringent crystalline element, the non-linear birefringent crystalline element having two opposed faces perpendicular to the optical axis of the non-linear birefringent crystalline element, an anti-reflective coating layer for a basic frequency of laser light generated in the dynamic laser rod on the face of the non-linear birefringent crystalline element facing the dynamic laser rod and a reflective coating highly reflecting the basic frequency laser light and a coating layer that is highly transmissive of a second harmonic of the basic frequency laser light on the face of the dynamic laser rod opposite the inclined face.
Claim 2
Dependent Claim
216 words
A second harmonic generating method comprising: arranging a dynamic laser rod having an optical axis with an inclined face forming an angle θ P , with respect to the optical axis of the dynamic laser rod so that ##EQU4## wherein θ B is the Brewster angle and η laser is the refractive index of the dynamic laser rod and an opposite face through which laser pumping light is received; and arranging an optical axis of a non-linear birefringent crystalline element to form the Brewster angle with a normal to the inclined face of the dynamic laser rod whereby light from the dynamic laser rod incident on the non-linear birefringent crystalline element is polarized perpendicular to the optical axis of the non-linear birefringent crystalline element, the non-linear birefringent crystalline element having two opposed faces perpendicular to the optical axis of the non-linear birefringent crystalline element, an anti-reflective coating layer for a basic frequency of laser light generated in the dynamic laser rod on the face of the non-linear birefringent crystalline element facing the dynamic laser rod and a reflective coating highly reflecting the basic frequency laser light and a coating layer that is highly transmissive of a second harmonic of the basic frequency laser light on the face of the dynamic laser rod opposite the inclined face.
Claim 3
Dependent Claim
111 words
A second harmonic generating apparatus comprising a non-linear birefringent crystalline element and a dynamic laser rod which has two transmission faces and an optical axis wherein the transmission face of the dynamic laser rod that faces the non-linear birefringent crystalline element is inclined at a predetermined angle with respect to the optical axis of the dynamic laser rod and the birefringent crystalline element has an optical axis forming a Brewster angle with a normal to the inclined transmission face of the dynamic laser rod whereby light from the dynamic laser rod incident on the non-linear birefringent crystalline element is polarized perpendicular to the optical axis of the non-linear birefringent crystal-line element.
Claim 4
Dependent Claim
111 words
A second harmonic generating apparatus comprising a non-linear birefringent crystalline element and a dynamic laser rod which has two transmission faces and an optical axis wherein the transmission face of the dynamic laser rod that faces the non-linear birefringent crystalline element is inclined at a predetermined angle with respect to the optical axis of the dynamic laser rod and the birefringent crystalline element has an optical axis forming a Brewster angle with a normal to the inclined transmission face of the dynamic laser rod whereby light from the dynamic laser rod incident on the non-linear birefringent crystalline element is polarized perpendicular to the optical axis of the non-linear birefringent crystal-line element.
Claim 5
Dependent Claim
57 words
The second harmonic generating apparatus according to claim 2 wherein an angle θ P of the inclined transmission face of the dynamic laser rod relative to the optical axis of the dynamic laser rod satisfies the expression: ##EQU5## wherein θ B is the Brewster angle and η laser is the refractive index of the dynamic laser rod.
Claim 6
Dependent Claim
30 words
The second harmonic generating apparatus according to claim 2 wherein the non-linear birefringent crystalline element has two faces that are perpendicular to the optical axis of the birefringent crystal-line element.
Claim 7
Dependent Claim
69 words
The second harmonic generating apparatus according to claim 2 including a highly reflective coating highly reflecting basic frequency laser light generated in the dynamic laser rod and a transmissive coating that highly transmits a second harmonic if the basic frequency laser light generated by the non-linear birefringent crystalline element on the transmission face of the dynamic laser rod, opposite the inclined transmission face, where pumping laser light is input.
Claim 8
Dependent Claim
65 words
The second harmonic generating apparatus according to claim 2 including an anti-reflective coating for the basic frequency laser light in the face of the non-linear birefringent crystal-line element that faces the dynamic laser rod and a highly transmissive coating highly transmitting a second harmonic of the basic frequency laser light on the face of the non-linear birefringent crystalline element remote from the dynamic laser rod.
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