Patent EP0310000A2 successfully refreshed from Google Patents.
EP0310000A2
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EP
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Laser apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1988-09-27
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Granted: —
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Expires: 2008-09-27
Abstract
Abstract A laser apparatus includes an optical resonator having a laser medium (1) and generating a laser light. A wavelength selection element (4) selects a given wavelength of the laser light. The selected wavelength resides within a gain bandwidth of the laser medium. A sealed container (5) houses the wavelength selection element (4). A sealed container may be filled with a gas. A density of the gas within the sealed container (5) may be changed to vary the selected wavelength.
Inventors
- 👤 Koichi Wani
- 👤 Yasuhiro Shimada
- 👤 Hidehito Kawahara
- 👤 Tadaaki Miki
- 👤 Yoshiro Ogata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:05
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/13; H01S3/136; H01S3/137; H01S3/106; H01S3/1062; H01S3/14; H01S3/22; H01S3/223; H01S3/225
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
52 words
A laser apparatus comprising: (a) an optical resonator including a laser medium and generating a laser light; (b) a wavelength selection element selecting a given wavelength of the laser light, the selected wavelength residing within a gain bandwidth of the laser medium; and (c) a sealed container housing the wavelength selection element.
Claim 2
Dependent Claim
52 words
A laser apparatus comprising: (a) an optical resonator including a laser medium and generating a laser light; (b) a wavelength selection element selecting a given wavelength of the laser light, the selected wavelength residing within a gain bandwidth of the laser medium; and (c) a sealed container housing the wavelength selection element.
Claim 3
Dependent Claim
19 words
The laser apparatus of claim 1 wherein a pressure within the sealed container is lower than an atmospheric pressure.
Claim 4
Dependent Claim
16 words
The laser apparatus of claim 1 wherein the sealed container is filled with an inert gas.
Claim 5
Dependent Claim
134 words
A laser apparatus comprising: (a) an optical resonator including a laser medium and generating a laser light having a band of wavelengths which corresponds to a gain bandwidth of the laser medium; (b) a sealed container filled with a gas; (c) a wavelength selection element disposed within the sealed container and selecting a wavelength of the laser light, wherein the selected wavelength is variable within the gain bandwidth of the laser medium in accordance with a density of the gas within the sealed container, and wherein the selected wavelength determines a central wavelength of a laser light outputted from a combination of the optical resonator and the wavelength selection element; and (d) means for varying the density of the gas within the sealed container to vary the central wavelength of the output laser light.
Claim 6
Dependent Claim
134 words
A laser apparatus comprising: (a) an optical resonator including a laser medium and generating a laser light having a band of wavelengths which corresponds to a gain bandwidth of the laser medium; (b) a sealed container filled with a gas; (c) a wavelength selection element disposed within the sealed container and selecting a wavelength of the laser light, wherein the selected wavelength is variable within the gain bandwidth of the laser medium in accordance with a density of the gas within the sealed container, and wherein the selected wavelength determines a central wavelength of a laser light outputted from a combination of the optical resonator and the wavelength selection element; and (d) means for varying the density of the gas within the sealed container to vary the central wavelength of the output laser light.
Claim 7
Dependent Claim
67 words
The laser apparatus of claim 4 further comprising means for detecting the central wavelength of the output laser light, means for determining a target wavelength, means for deriving a difference between the detected central wavelength and the target wavelength, and means for controlling the density-varying means in accordance with the derived difference to hold the central wavelength of the output laser light essentially at the target wavelength.
Claim 8
Dependent Claim
24 words
The laser apparatus of claim 5 futher comprising means for varying the target wavelength to vary the central wavelength of the output laser light.
Claim 9
Dependent Claim
17 words
The laser apparatus of claim 4 wherein the gas within the sealed cotainer includes an inert gas.
Claim 10
Dependent Claim
102 words
A laser apparatus comprising: (a) an optical resonator generating a laser light; (b) a sealed container filled with a gas; (c) a wavelength selection element disposed within the sealed container and selecting a wavelength of the laser light; and (d) means for detecting a central wavelength of a laser light outputted from a combination of the optical resonator and the wavelength selection element; and (e) means for adjusting a density of the gas within the sealed container in accordance with the detected central wavelength of the output laser light to control the central wavelength of the output laser in a feedback manner.
Claim 11
Dependent Claim
102 words
A laser apparatus comprising: (a) an optical resonator generating a laser light; (b) a sealed container filled with a gas; (c) a wavelength selection element disposed within the sealed container and selecting a wavelength of the laser light; and (d) means for detecting a central wavelength of a laser light outputted from a combination of the optical resonator and the wavelength selection element; and (e) means for adjusting a density of the gas within the sealed container in accordance with the detected central wavelength of the output laser light to control the central wavelength of the output laser in a feedback manner.
Claim 12
Dependent Claim
17 words
The laser apparatus of claim 8 wherein the gas within the sealed container includes an inert gas.
Claim 13
Dependent Claim
61 words
The laser apparatus of claim 8 wherein the wavelength detecting means comprises a second sealed container, a wavelength dispersion element disposed within the second sealed container and forming a spectrum pattern of the output laser light, means for sensing the spectrum pattern, and means for determining the central wavelength of the output laser light in accordance with the sensed spectrum pattern.
Claim 14
Dependent Claim
23 words
The laser apparatus of claim 8 wherein the wavelength detecting means outputs a signal to the controlling means via an optical fiber cable.
Claim 15
Dependent Claim
63 words
A laser apparatus comprising: (a) an optical resonator outputting a laser light; (b) a sealed container; (c) a wavelength dispersion element disposed within the sealed container and forming a spectrum pattern of the output laser light; (d) means for sensing the spectrum pattern; and (e) means for determining a wavelength of the output laser light on the basis of the sensed spectrum pattern.
Claim 16
Dependent Claim
63 words
A laser apparatus comprising: (a) an optical resonator outputting a laser light; (b) a sealed container; (c) a wavelength dispersion element disposed within the sealed container and forming a spectrum pattern of the output laser light; (d) means for sensing the spectrum pattern; and (e) means for determining a wavelength of the output laser light on the basis of the sensed spectrum pattern.
Claim 17
Dependent Claim
16 words
The laser apparatus of claim 12 wherein the sealed container is filled with an inert gas.
Claim 18
Dependent Claim
81 words
The laser apparatus of claim 12 wherein the wavelength determining means comprises means for calculating an integral of an intensity of light in the spectrum pattern located in a shorter wavelength side of a reference point, means for calculating an integral of an intensity of light in the spectrum pattern located in a longer wavelength side of the reference point, means for comparing the calculated integrals, and means for calculating the wavelength on the basis of the comparison between the integrals.
References Cited (Backward Citations)
No citation records indexed.
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