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EP0342523A2
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Generation of parallel second harmonic light rays using an optical fiber
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1989-05-11
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Granted: —
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Expires: 2009-05-11
Abstract
Abstract An arrangement for generating light at a second harmonic of an input light at a fundamental frequency/wavelength. Light at the fundamental frequency/wavelength is generated by a laser (1) and impinges upon an input end of an optical fiber (4). The optical fiber has a non-linear optical characteristic and generates a second harmonic of the input light. The second harmonic which exits the fiber (4) has an axisymmetrical and conical equiphase wave surface. A collimator lens (5) collimates the second harmonic and parallel light rays are produced on the output side of the lens.
Inventors
- 👤 Naota C/O Osaka Works Uenishi
- 👤 Takafumi C/O Osaka Works Uemiya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:44
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; G02F1/377; G02F1/383; G02F1/372
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
Apparatus for generating parallel second harmonic light rays comprising: a laser light source capable of emitting a light at a fundamental frequency/wavelength; an optical fiber made of a material having non-linear optical characteristic for generating second harmonic light in response to said fundamental frequency/wavelength light from said laser light source; and a collimator lens having an inclined circular symmetrical surface for converting said second harmonic light output from said optical fiber into parallel light rays.
Claim 2
Dependent Claim
37 words
Apparatus as in claim 1 further comprising: a first lens for collimating light form said laser light source; and a second lens for converging light from said first lens onto an input end of said optical fiber.
Claim 3
Dependent Claim
15 words
Apparatus as in claim 1 wherein said optical fiber comprises a core and a clad.
Claim 4
Dependent Claim
13 words
Apparatus as in claim 1 wherein said collimator lens is conical in shape.
Claim 5
Dependent Claim
17 words
Apparatus as in claim 1 wherein said collimator lens is in the shape of a truncated cone.
Claim 6
Dependent Claim
21 words
Apparatus as in claim 1 wherein said collimator lens is in the shape of a cone having a cylindrical columnar support.
Claim 7
Dependent Claim
22 words
Apparatus as in claim 1 wherein said collimator lens is in the shape of a truncated cone having a cylindrical columnar support.
Claim 8
Dependent Claim
13 words
Apparatus as in claim 1 wherein said collimator lens has opposite inclined sides.
Claim 9
Dependent Claim
25 words
Apparatus as in claim 1 wherein an output end of said optical fiber and an input side of said collimator lens are touching one another.
Claim 10
Independent Claim
76 words
A method for generating parallel rays of a second harmonic comprising the steps of: generating laser light at a fundamental frequency/wavelength; causing the fundamental frequency/wavelength light to inpinge on an optical fiber made of a non-linear material which, in response, generates light at a second harmonic of said fundamental frequency/wavelength; and collimating said second harmonic light using a collimator lens disposed so that said lens' optical axis is aligned with said optical fiber's axis of symmetry.
References Cited (Backward Citations)
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