EP0596714A1
Expired / Lapsed
EP
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Solid state laser apparatus
Assignee: Mitsui Chemicals Inc
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Filing: 1993-11-03
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Granted: —
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Expires: 2013-11-03
Abstract
Abstract A solid state laser apparatus capable of suppressing a mode hopping phenomena by restricting longitudinal modes except a fundamental mode, and providing a very stable output. The solid state laser apparatus comprises such components as a semiconductor laser (20) emitting a pumping radiation (26) for exciting a lasant material (23), lens systems (21) for focusing the pumping radiation (26) and an optical resonator (25) comprising a concave mirror (22), the lasant material (23) formed of Nd:YVO₄ doped with approximately 1 at% of Nd and a non-linear optical element (24) formed of KTiOPO₄ with an inclined c-axis.
Inventors
- 👤 Kenji c/o Mitsui Petrochem. Ind. Ltd. Suzuki
- 👤 Akira C/O Mitsui Petrochem.Ind.Ltd. Eda
- 👤 Katsuhiko C/O Mitsui Petrochem.Ind. Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:37
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/108; H01S3/109; H01S3/05; H01S3/06; H01S3/0602; H01S3/0604; H01S3/0627; H01S3/08; H01S3/08018; H01S3/0804; H01S3/0805; H01S3/08054; H01S3/08059; H01S3/08063; H01S3/14; H01S3/16; H01S3/163; H01S3/1671; H01S3/1673
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
79 words
A solid state laser apparatus with plural optical elements disposed in an optical resonator (6;25), wherein one of the optical elements is a lasant material (3;23) excited by a pumping radiation (10;26), at least two of the optical elements are birefringent optical elements, and an optical axis of the optical resonator (6;25) is formed by one of two polarizing optical axes separated by a beam walk-off that is caused in a first one (1;23;24) of the birefringent optical elements.
Claim 2
Dependent Claim
70 words
The solid state laser apparatus as claimed in claim 1, wherein the optical resonator (6;25) is of a linear type, at least one of reflecting mirror means composing the optical resonator (6;25) is curved mirror means (4;1c;23c;24c;33b;22a), and the first birefringent optical element (1;23;24) is placed between the curved mirror means (4;1;23c;24c;33b;22a) and a second one (2;24;23;41) of the birefringent optical element other than the first birefringent optical element (1;23;24).
Claim 3
Dependent Claim
68 words
The solid state laser apparatus as claimed in claim 1 or 2, wherein the optical resonator (6;25) is of a linear type, at least one of reflecting mirror means composing the optical resonator (6;25) is flat mirror means (5;24b;23a), and a second birefringent optical element (2;24;23;41) other than the first birefringent optical element is placed between the flat mirror means (5;24b;23a) and the first birefringent optical element (1;23;24).
Claim 4
Dependent Claim
23 words
The solid state laser apparatus as claimed in claim 1, 2 or 3, the lasant material (23) is the first birefringent optical element.
Claim 5
Dependent Claim
73 words
The solid state laser apparatus as claimed in claim 4, wherein curved reflecting mirror means (4;23c;33b) composing the optical resonator (25), the lasant material (1;23) providing the first birefringent optical element, at least one (2;24) of the second birefringent optical elements and reflecting mirror means (5;24b) composing the optical resonator are placed inthat order from an incident side of the pumping radiation, and a beam walk-off is caused in the lasant material (1;23).
Claim 6
Dependent Claim
21 words
The solid state laser apparatus as claimed in claim 4 or 5, wherein the lasant material (23) is formed of Nd:YVO₄.
Claim 7
Dependent Claim
49 words
The solid state laser apparatus as claimed in claim 6, wherein at least one (2;24) of the second birefringent optical elements is formed of a non-linear optical material, and a laser beam oscillated by the lasant material (1;23) is converted to a second harmonic by the non-linear optical material.
Claim 8
Dependent Claim
19 words
The solid state laser apparatus as claimed in claim 7, wherein the non-linear optical material is formed of KTiOPO₄.
Claim 9
Dependent Claim
71 words
The solid state laser apparatus as claimed in claim 3 wherein curved mirror means (4) composing the optical resonator, the lasant material (3), the first birefringent optical element (1), the second birefringent optical element (2) and flat mirror means (5) composing the optical resonator are placed in that order from an incident side of the pumping radiation, and a beam walk-off is caused also in the second birefringent optical element (2).
Claim 10
Dependent Claim
23 words
The solid state laser apparatus as claimed in claim 1 or 2, wherein the lasant material is the second birefringent optical element (2;24;23;41).
Claim 11
Dependent Claim
59 words
The solid state laser apparatus as claimed in claim 10, wherein reflecting mirror means (31a;23a) composing the optical resonator (25), the lasant material (23) providing the second birefringent optical element, the first birefringent optical element (24) and curved mirror means (24c,22a) composing the optical resonator (25) are placed in the order from an incident side of the pumping radiation.
Claim 12
Dependent Claim
45 words
The solid state laser apparatus as claimed in claim 11, wherein the first birefringent optical element (24) is formed of a non-linear optical material, and a laser beam oscillated by the lasant material (23) is converted to a second harmonic by the non-linear optical material.
Claim 13
Dependent Claim
58 words
The solid state laser apparatus as claimed in claim 2, reflecting mirror means (23a) composing the optical resonator (25), the lasant material (23), the second birefringent optical element (41), the first birefringent optical element (24) and curved mirror means (22a) composing the optical resonator (25) are placed in the order from an incident side of the pumping radiation.
Claim 14
Dependent Claim
19 words
The solid state laser apparatus as claimed in claim 13, wherein the lasant material (23) is formed of Nd:YAG.
Claim 15
Dependent Claim
47 words
The solid state laser apparatus as claimed in claim 13 or 14, wherein the first birefringent optical element (24) is formed of a non-linear optical material, and a laser beam oscillated by the lasant material (23) is converted to a second harmonic by the non-linear optical material.
Claim 16
Dependent Claim
19 words
The solid state laser apparatus as claimed in claim 15, wherein the non-linear optical material is formed of KNbO₃.
References Cited (Backward Citations)
JPH02150084A
Cited
US5130997A
Cited
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