US5084879A
Expired / Lapsed
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Phase matching in harmonic laser apparatus including a MgO:LiNbO3 crystal at room temperature
Assignee: Hamamatsu Photonics KK
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Filing: 1990-06-21
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Granted: 1992-01-28
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Expires: 2010-06-21
Abstract
Abstract In response to fundamental laser light, a LiNbO 3 crystal emits second harmonic laser light. A phase matching angle of 90 degrees is obtained at room temperature by using a LiNbO 3 crystal doped with MgO at a proper concentration. In the case where fundamental laser light of 1064 nm is applied from a Nd-YAG laser, the concentration of MgO should be about 1.0 mol % or about 7.5 mol %.
Inventors
- 👤 Hideo Suzuki
- 👤 Takashi Suzuki
- 👤 Yasushi Obayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:56
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/108; H01S3/109; H01S3/09; H01S3/091; H01S3/094; H01S3/0941; H01S3/1095
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
A laser light emitting apparatus comprising: fundamental laser means for emitting fundamental laser light; a LiNbO 3 crystal doped with MgO at such a concentration that a phase matching angle of 90 degrees is obtained at room temperature, for emitting harmonic laser light in response to the fundamental light; and means for inputting the fundamental laser light from the fundamental laser means into the LiNbO 3 crystal at a predetermined incident angle.
Claim 2
Dependent Claim
72 words
A laser light emitting apparatus comprising: fundamental laser means for emitting fundamental laser light; a LiNbO 3 crystal doped with MgO at such a concentration that a phase matching angle of 90 degrees is obtained at room temperature, for emitting harmonic laser light in response to the fundamental light; and means for inputting the fundamental laser light from the fundamental laser means into the LiNbO 3 crystal at a predetermined incident angle.
Claim 3
Dependent Claim
16 words
The apparatus according to claim 1, wherein the harmonic laser light is second harmonic laser light.
Claim 4
Dependent Claim
37 words
The apparatus according to claim 1, wherein the fundamental laser means is a solid-state laser selected from the group consisting of a Nd-YAG laser, a Nd-YLF laser, a Nd-glass laser, a Nd-BEL laser and a Nd-YAP laser.
Claim 5
Dependent Claim
15 words
The apparatus according to claim 1, wherein the fundamental laser means is a Cu-vapor laser.
Claim 6
Dependent Claim
21 words
The apparatus according to claim 1, wherein the fundamental laser means and the LiNbO 3 crystal are provided within a resonator.
Claim 7
Dependent Claim
18 words
The apparatus according to claim 2, wherein a Nd:MgO:LiNbO 3 crystal is used as a self-second-harmonic generating crystal.
Claim 8
Dependent Claim
38 words
The apparatus according to claim 3, wherein the fundamental laser means is the Nd-YAG laser which operates at a wavelength of 1064 nm, and the concentration of MgO is about 1.0 mol % or about 7.5 mol %.
Claim 9
Dependent Claim
76 words
A phase matching method in a laser light emitting apparatus, comprising the steps of: preparing a LiNbO 3 crystal doped with MgO at such a concentration that a phase matching angle of 90 degrees is obtained at room temperature; generating fundamental light; and inputting the fundamental light to the LiNbO 3 crystal at a predetermined incident angle; whereby harmonic laser light is emitted from the LiNbO 3 crystal with the phase matching angle of 90 degrees.
Claim 10
Dependent Claim
76 words
A phase matching method in a laser light emitting apparatus, comprising the steps of: preparing a LiNbO 3 crystal doped with MgO at such a concentration that a phase matching angle of 90 degrees is obtained at room temperature; generating fundamental light; and inputting the fundamental light to the LiNbO 3 crystal at a predetermined incident angle; whereby harmonic laser light is emitted from the LiNbO 3 crystal with the phase matching angle of 90 degrees.
Claim 11
Dependent Claim
16 words
The method according to claim 8, wherein the harmonic laser light is second harmonic laser light.
Claim 12
Dependent Claim
18 words
The method according to claim 9, wherein a Nd:MgO:LiNbO 3 crystal is used as a self-second-harmonic generating crystal.
Claim 13
Dependent Claim
41 words
The method according to claim 8, wherein the fundamental laser light is laser light emitted from a Nd-YAG laser and having a wavelength of 1064 nm, and the concentration of MgO is about 1.0 mol % or about 7.5 mol %.
References Cited (Backward Citations)
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