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US5335245A Expired / Lapsed US ⏱️ 0.0 years remaining

Power laser with uncoated diamond window

Assignee: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
•
Filing: 1993-02-17
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Granted: 1994-08-02
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Expires: 2013-02-17
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Abstract

Abstract A power laser has a cavity (2) delimited at its opposite ends by a first partially transmitting window (3) and a second reflecting window ( 4). The first window (3) is constituted by at least one diamond wafer (5) with uncoated flat parallel surfaces, having a controlled thickness whose variations do not exceed 0.2 micron. The diamond wafer (5; 6) is mounted in an annular support (9; 10) of material which is a good heat conductor and is provided with a cooler (11; 12). The window (3) can comprise two parallel wafers (5 A , 5 B ) of diamond separated by a calibrated distance (14) which is an uneven multiple of λ/4n, λ being the laser wavelength and n the index of refraction of the medium between the wafers. Or the second window (4) can also be constituted by a diamond wafer (6) with a reflective metallic coating (60). A sweeping gas can be blown over the internal surface of at least one of the windows.

Inventors

  • 👤 Bruno Marie
  • 👤 Daniel Guerin
  • 👤 Christian Larquet

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 20:31
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 52 words
A power laser comprising a cavity (2) delimited at respective opposite ends by a first partially transmitting window (3) and a second reflecting window (4), said first window (3) comprising at least one diamond wafer (5) with uncoated flat parallel surfaces, having a controlled thickness whose variations do not exceed 0.2 micron.
Claim 2
Dependent Claim 52 words
A power laser comprising a cavity (2) delimited at respective opposite ends by a first partially transmitting window (3) and a second reflecting window (4), said first window (3) comprising at least one diamond wafer (5) with uncoated flat parallel surfaces, having a controlled thickness whose variations do not exceed 0.2 micron.
Claim 3
Dependent Claim 37 words
Laser according to claim 1, wherein the diamond wafer (5; 6) is mounted in an annular support (9; 10) of material which is a good heat conductor, and cooling means (11; 12) for the wafer (5; 6).
Claim 4
Dependent Claim 27 words
Laser according to claim 1, wherein the window (3) comprises two parallel wafers (5 A , 5 B ) of diamond separated by a calibrated distance (14).
Claim 5
Dependent Claim 33 words
Laser according to claim 3, wherein said calibrated distance (14) is an uneven multiple of λ/4n, λ being the laser wavelength and n the index of refraction of the medium between the wafers.
Claim 6
Dependent Claim 24 words
Laser according to claim 1, wherein the second window (4) is also constituted by a diamond wafer (6) with a reflective metallic coating (60).
Claim 7
Dependent Claim 37 words
Laser according to claim 1, which is a gas laser, and which further comprises, in the cavity (2), means (13) for circulation of a sweeping gas over the internal surface of at least one of the windows.
Claim 8
Dependent Claim 21 words
Laser according to claim 1, which is a CO 2 laser, wherein the diamond of the wafers (5; 6) is C-II-A.
Claim 9
Dependent Claim 17 words
Laser according to claim 7, wherein the thickness of the wafers (5,6) does not exceed 0.5 mm.

References Cited (Backward Citations)

US3895313A Cited
US4536442A Cited
WO1989008856A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-08-01 1998-01-31 1998-08-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-08-01 2002-01-31 2002-08-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-08-01 2006-01-31 2006-08-02 $7700.00 Window Closed / Lapsed

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