US4921357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser oscillator device
Assignee: Fanuc Corp
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Filing: 1988-04-28
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Granted: 1990-05-01
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Expires: 2008-04-28
Abstract
Abstract A laser oscillator device applies a high-frequency voltage to a plurality of discharge regions through a dielectric for producing a high-frequency discharge for laser pumping. The laser oscillator device includes a DC power supply (16), and a high-frequency power supply (18, 19, 20, 21) for converting a DC voltage into a high-frequency voltage. The DC power supply (16) and the high-frequency power supply (18, 19, 20, 21) are coupled to each other by a filter (30). The filter (30) prevents a high-frequency component from being fed back from the high-frequency power supply (18, 19, 20, 21) to prevent the laser oscillator device from operating unstably due to parasitic oscillation. Other arrangements are disclosed for preventing interference between the high-frequency power supply and the DC power supply.
Inventors
- 👤 Norio Karube
- 👤 Akira Egawa
- 👤 Etsuo Yamazaki
- 👤 Nobuaki Iehisa
- 👤 Mitsuo Manabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:42
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0975
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A laser oscillator device for applying a high-frequency voltage to a plurality of discharge regions through a dielectric to produce a high-frequency discharge for laser pumping, comprising: DC power supply means for providing a DC voltage; high-frequency power supply means for converting the DC voltage into a high-frequency voltage including a high-frequency signal component; and filter means for coupling said DC power supply means and said high-frequency power supply and for blocking the high-frequency signal component from being feedback to said DC power supply means to thereby stabilize said DC power supply means.
Claim 2
Dependent Claim
93 words
A laser oscillator device for applying a high-frequency voltage to a plurality of discharge regions through a dielectric to produce a high-frequency discharge for laser pumping, comprising: DC power supply means for providing a DC voltage; high-frequency power supply means for converting the DC voltage into a high-frequency voltage including a high-frequency signal component; and filter means for coupling said DC power supply means and said high-frequency power supply and for blocking the high-frequency signal component from being feedback to said DC power supply means to thereby stabilize said DC power supply means.
Claim 3
Dependent Claim
17 words
A laser oscillator device according to claim 1, wherein said filter means comprises an LC filter circuit.
Claim 4
Dependent Claim
15 words
A laser oscillator device according to claim 1, wherein said filter means comprises a resistor.
Claim 5
Dependent Claim
109 words
A laser oscillator device for applying a high-frequency voltage to a plurality of discharge regions through a dielectric to produce a high-frequency discharge for laser pumping, comprising: DC power supply means for providing a DC voltage; high-frequency power supply means for converting the DC voltage into a high-frequency voltage including a high-frequency signal component; and coupling line means for coupling said DC power supply means and said high-frequency power supply and for blocking the high-frequency signal component from being feedback to said DC power supply means to thereby stabilize said DC power supply means, said coupling line means further including a shield grounded near said high-frequency power supply means.
Claim 6
Dependent Claim
109 words
A laser oscillator device for applying a high-frequency voltage to a plurality of discharge regions through a dielectric to produce a high-frequency discharge for laser pumping, comprising: DC power supply means for providing a DC voltage; high-frequency power supply means for converting the DC voltage into a high-frequency voltage including a high-frequency signal component; and coupling line means for coupling said DC power supply means and said high-frequency power supply and for blocking the high-frequency signal component from being feedback to said DC power supply means to thereby stabilize said DC power supply means, said coupling line means further including a shield grounded near said high-frequency power supply means.
Claim 7
Dependent Claim
114 words
A laser oscillator device for applying a high-frequency voltage to a plurality of discharge regions through a dielectric to produce a high-frequency discharge for laser pumping, comprising: DC power supply means for providing a DC voltage and having an output impedance; high-frequency power supply means for converting the DC voltage into a high-frequency voltage; and feedback line means for feeding back a current from an input of said high-frequency power supply to said DC power supply means so as to lower the output impedance of said DC power supply means and to block the high-frequency signal component from being feedback to said DC power supply means to thereby stabilize said DC power supply means.
Claim 8
Dependent Claim
114 words
A laser oscillator device for applying a high-frequency voltage to a plurality of discharge regions through a dielectric to produce a high-frequency discharge for laser pumping, comprising: DC power supply means for providing a DC voltage and having an output impedance; high-frequency power supply means for converting the DC voltage into a high-frequency voltage; and feedback line means for feeding back a current from an input of said high-frequency power supply to said DC power supply means so as to lower the output impedance of said DC power supply means and to block the high-frequency signal component from being feedback to said DC power supply means to thereby stabilize said DC power supply means.
References Cited (Backward Citations)
US4706252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |