US4988859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical waveform measuring device
Assignee: Hamamatsu Photonics KK
•
Filing: 1989-05-11
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Granted: 1991-01-29
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Expires: 2009-05-11
Abstract
Abstract An optical waveform measuring device, comprising an optical amplifier for amplifying a light beam under measurement and a photodetector to which a light beam amplified by the optical amplifier is applied.
Inventors
- 👤 Yutaka Tsuchiya
- 👤 Shinichiro Aoshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:47
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/0407; G01J1/0459; G01J1/42; H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/501; H01J31/502; G01J1/44; G01J2001/4446; G01J2001/4486
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
74 words
An optical waveform measuring device, comprising: an optical amplifier to which a light beam under measurement is applied, said light beam under measurement having an original wavelength and said amplifier amplifying the intensity of said light beam under measurement at or near said original wavelength; a photodetector having means for generating an electron image in response to an amplified light beam generated by said optical amplifier in response to said light beam under measurement.
Claim 2
Dependent Claim
74 words
An optical waveform measuring device, comprising: an optical amplifier to which a light beam under measurement is applied, said light beam under measurement having an original wavelength and said amplifier amplifying the intensity of said light beam under measurement at or near said original wavelength; a photodetector having means for generating an electron image in response to an amplified light beam generated by said optical amplifier in response to said light beam under measurement.
Claim 3
Dependent Claim
18 words
An optical waveform measuring device as set forth in claim 1, wherein said photodetector is a streak tube.
Claim 4
Dependent Claim
46 words
An optical waveform measuring device as set forth in claim 1, wherein said optical amplifier is a non-resonance traveling-wave type optical amplifier; and said non-resonance type amplifier is provided as a semiconductor laser having a anti-reflection coatings on both end faces for preventing optical reflection therefrom.
Claim 5
Dependent Claim
27 words
An optical waveform measuring device as set forth in claim 3, wherein each of said end faces is cut at an angle equal to the Brewster angle.
Claim 6
Dependent Claim
22 words
An optical waveform measuring device as set forth in claim 1, wherein said optical amplifier is a Fabry Perot type optical amplifier.
Claim 7
Dependent Claim
31 words
An optical waveform measuring device as set forth in claim 1, wherein said optical amplifier comprises a solid state laser medium pumped by an exciting light beam from a semiconductor laser.
Claim 8
Dependent Claim
29 words
An optical waveform measuring device as set forth in claim 1, wherein said optical amplifier comprises a laser medium pumped by an exciting light beam from a semiconductor laser.
Claim 9
Dependent Claim
20 words
An optical waveform measuring device as set forth in claim 1, wherein said optical amplifier comprises a gas laser medium.
Claim 10
Dependent Claim
20 words
An optical waveform measuring device as set forth in claim 1, wherein said optical amplifier comprises a dye laser medium.
Claim 11
Dependent Claim
20 words
An optical waveform measuring device as set forth in claim 7, wherein said light source comprises a light emitting diode.
Claim 12
Dependent Claim
20 words
An optical waveform measuring device as set forth in claim 7, wherein said light source comprises a current controlled lamp.
Claim 13
Dependent Claim
49 words
An optical waveform measuring device as set forth in claim 1, wherein said optical amplifier includes a gas laser medium, at least two opposing electrodes and a current-to-voltage converter, said medium disposed between said electrodes and said converter for applying a voltage across the electrodes to excite said medium.
Claim 14
Dependent Claim
29 words
An optical waveform measuring device as set forth in claim 1, wherein the gain of said optical amplifier is variable and said optical amplifier serves as a light gate.
Claim 15
Dependent Claim
29 words
An optical waveform measuring device as set forth in claim 3, wherein the gain of said optical amplifier is variable and said optical amplifier serves as a light gate.
Claim 16
Dependent Claim
31 words
An optical waveform measuring device as set forth in claim 1, wherein said means for generating an electron image includes an electron sampling slit plate for spatially limiting said electron image.
Claim 17
Dependent Claim
31 words
An optical waveform measuring device as set forth in claim 2, wherein said means for generating an electron image includes an electron sampling slit plate for spatially limiting said electron image.
Claim 18
Dependent Claim
65 words
An optical waveform measuring device as set forth in claim 15 or 16, wherein the photodetector generates a sampling output, said device further comprising a light chopping element for turning on and off said light beam under measurement at a predetermined frequency and a lock-in amplifier having a narrow band width for detecting a predetermined frequency component out of said sampling output of said photodetector.
Claim 19
Dependent Claim
60 words
An optical waveform measuring device as set forth in claim 1, the device further comprising at least two optical amplifiers for amplifying light, the outputs of which are applied through optical fibers to said means for generating an electron image of said photodetector such that said outputs are arranged in a line on said means for generating an electron image.
Claim 20
Dependent Claim
54 words
An optical waveform measuring device as set forth in claim 1, wherein said photodetector includes means for converting an electron image into an optical image, the waveform measuring device further comprising an image, pickup device for detecting said optical image and a display unit for displaying an output signal of said image pickup device.
Claim 21
Dependent Claim
54 words
An optical waveform measuring device as set forth in claim 2, wherein said photodetector includes means for converting an electron image into an optical image, the waveform measuring device further comprising an image pickup device for detecting said optical image and a display unit for displaying an output signal of said image pickup device.
Claim 22
Dependent Claim
54 words
An optical waveform measuring device as set forth in claim 3, wherein said photodetector includes means for converting an electron image into an optical image, the waveform measuring device further comprising an image pickup device for detecting said optical image and a display unit for displaying an output signal of said image pickup device.
Claim 23
Dependent Claim
55 words
An optical waveform device as set forth in claim 13 or 14, wherein said photodetector includes means for converting an electron image into an optical image, the waveform measuring device further comprising an image pickup device for detecting said optical image and a display unit for displaying an output signal of said image pickup device.
Claim 24
Dependent Claim
53 words
An optical waveform measuring device as set forth in claim 15 or 16, wherein said photodetector includes means for converting an electron image into an optical image, the waveform measuring device further comprising a second-detector for detecting said optical image and a display unit for displaying an output signal of said second photo-detector.
Claim 25
Dependent Claim
23 words
An optical waveform measuring device as set forth in claim 17, wherein said light chopping element comprises a non-resonance traveling-wave type optical amplifier.
Claim 26
Dependent Claim
27 words
An optical waveform measuring device as set forth in claim 19, wherein said means for converting an electron image into an optical image comprises a phosphor screen.
Claim 27
Dependent Claim
27 words
An optical waveform measuring device as set forth in claim 20, wherein said means for converting an electron image into an optical image comprises a phosphor screen.
Claim 28
Dependent Claim
27 words
An optical waveform measuring device as set forth in claim 21, wherein said means for converting an electron image into an optical image comprises a phosphor screen.
Claim 29
Dependent Claim
27 words
An optical waveform measuring device as set forth in claim 22, wherein said means for converting an electron image into an optical image comprises a phosphor screen.
Claim 30
Dependent Claim
27 words
An optical waveform measuring device as set forth in claim 23, wherein said means for converting an electron image into an optical image comprises a phosphor screen.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
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