US4923277A
Expired / Lapsed
US
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Optical wavelength converter device
Assignee: Fujifilm Holdings Corp
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Filing: 1988-11-02
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Granted: 1990-05-08
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Expires: 2008-11-02
Abstract
Abstract An optical wavelength converter device of the optical fiber type includes a core made of a nonlinear optical material and cladding surrounding the core for converting a wave having a fundamental frequency, which wave is applied to an end of the core, to its second harmonic and radiating the second harmonic into the cladding in such a way as to eliminate interference between the waves traveling in a guided mode in which the fundamental is guided through the core and the waves traveling in a radiation mode in which the second harmonic is radiated into the cladding. The cladding has a diameter of at least 500 μm.
Inventors
- 👤 Yoji Okazaki
- 👤 Koji Kamiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:56
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; G02F1/377; G02F1/383
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
An optical wavelength converter device comprising: (i) a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mode in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding, said cladding having a diameter of at least 500 μm.
Claim 2
Dependent Claim
90 words
An optical wavelength converter device comprising: (i) a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mode in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding, said cladding having a diameter of at least 500 μm.
Claim 3
Dependent Claim
131 words
An optical wavelength converter device according comprising: a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mole in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding, said cladding having a diameter of at least 500 μm; wherein said diameter of the cladding is greater than or equal to L.tan θ+d, where d is the diameter of said core, θ the phase matching angle of the second harmonic, and L the length of the optical wavelength converter device.
Claim 4
Dependent Claim
131 words
An optical wavelength converter device according comprising: a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mole in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding, said cladding having a diameter of at least 500 μm; wherein said diameter of the cladding is greater than or equal to L.tan θ+d, where d is the diameter of said core, θ the phase matching angle of the second harmonic, and L the length of the optical wavelength converter device.
Claim 5
Dependent Claim
131 words
An optical wavelength converter device comprising: (i) a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mode in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding, said cladding having a diameter of at least 500 μm; wherein said diameter of the cladding is greater than or equal to 2L.tan θ+d, where d is the diameter of said core, θ the phase matching angle of the second harmonic, and L the length of the optical wavelength converter device.
Claim 6
Dependent Claim
131 words
An optical wavelength converter device comprising: (i) a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mode in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding, said cladding having a diameter of at least 500 μm; wherein said diameter of the cladding is greater than or equal to 2L.tan θ+d, where d is the diameter of said core, θ the phase matching angle of the second harmonic, and L the length of the optical wavelength converter device.
Claim 7
Dependent Claim
121 words
Am optical wavelength converter device comprising: (i) a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mode in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding; wherein the diameter of the cladding is greater than or equal to L.tan θ+d, where d is the diameter of said core, θ the phase matching angle of the second harmonic, and L the length of the optical wavelength converter device.
Claim 8
Dependent Claim
121 words
Am optical wavelength converter device comprising: (i) a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mode in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding; wherein the diameter of the cladding is greater than or equal to L.tan θ+d, where d is the diameter of said core, θ the phase matching angle of the second harmonic, and L the length of the optical wavelength converter device.
Claim 9
Dependent Claim
121 words
An optical wavelength converter device comprising: (i) a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mode in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding; wherein the diameter of the cladding is greater than or equal to 2L.tan θ+d, where d is the diameter of said core, θ the phase matching angle of the second harmonic, and L the length of the optical wavelength converter device.
Claim 10
Dependent Claim
121 words
An optical wavelength converter device comprising: (i) a core made of a nonlinear optical material; and (ii) cladding surrounding said core, for converting a fundamental applied to an end of said core to a second harmonic and radiating said second harmonic into said cladding to eliminate interference between waves traveling in a guided mode in which the fundamental is guided through said core and waves traveling in a radiation mode in which the second harmonic is radiated into said cladding; wherein the diameter of the cladding is greater than or equal to 2L.tan θ+d, where d is the diameter of said core, θ the phase matching angle of the second harmonic, and L the length of the optical wavelength converter device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |