US4909595A
Expired / Lapsed
US
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Optical wavelength conversion method and optical wavelength converter module
Assignee: Fujifilm Holdings Corp
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Filing: 1988-09-14
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Granted: 1990-03-20
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Expires: 2008-09-14
Abstract
Abstract A bulk crystal type optical wavelength converter device is made of a monocrystalline nonlinear optical material (3,5-dimethyl-1-(4-nitrophenyl)pyrazole, referred to as PRA). A linearly polarized fundamental having a wavelength ranging from 900 to 4000 nm is applied to the bulk monocrystalline nonlinear optical material to achieve angular phase matching of the type I for obtaining a second harmonic of the fundamental. An optical wavelength converter module comprises a fiber type optical wavelength converter device and a light source device. The optical wavelength converter device includes a core made of a monocrystal of the PRA which has a crystal orientation such that the c-axis thereof extends substantially along the axis of the core. The light source device applies, to the optical wavelength converter device, a fundamental which is linearly polarized in the direction of the a-axis or b-axis of the crystal which is normal to the c-axis.
Inventors
- 👤 Yoji Okazaki
- 👤 Koji Kamiyama
- 👤 Akinori Harada
- 👤 Takayuki Katoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:16
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; G02F1/377; G02F1/383
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
An optical wavelength conversion method of converting linearly polarized fundamental to a second harmonic which has a wavelength that is 1/2 of the wavelength of the fundamental by applying the fundamental to a nonlinear optical material represented by the following molecular diagram: ##STR2## said method comprising the step of applying a fundamental having a wavelength ranging from 900 to 4000 nm to the nonlinear optical material to achieve angular phase matching of the type I for producing a second harmonic of the fundamental.
Claim 2
Dependent Claim
83 words
An optical wavelength conversion method of converting linearly polarized fundamental to a second harmonic which has a wavelength that is 1/2 of the wavelength of the fundamental by applying the fundamental to a nonlinear optical material represented by the following molecular diagram: ##STR2## said method comprising the step of applying a fundamental having a wavelength ranging from 900 to 4000 nm to the nonlinear optical material to achieve angular phase matching of the type I for producing a second harmonic of the fundamental.
Claim 3
Dependent Claim
130 words
A optical wavelength converter module comprising: (i) a fiber type optical wavelength converter device including cladding and a core filled in said cladding, said core being made of a monocrstalline nonlinear optical material represented by the following molecular diagram: ##STR3## said optical material being a crystal which is as a rhombic system with three orthogonal axes a, b and c of the crystal being defined such that their lengths are in the order of b>a>c, and having a crystal orientation such that the c-axis thereof extends substantially along the axis of said core, and (ii) a light source device for applying a fundamental which is linearly polarized in the direction of the a-axis of b-axis of the crystal which are normal to said c-axis, to said optical wavelength converter device.
Claim 4
Dependent Claim
130 words
A optical wavelength converter module comprising: (i) a fiber type optical wavelength converter device including cladding and a core filled in said cladding, said core being made of a monocrstalline nonlinear optical material represented by the following molecular diagram: ##STR3## said optical material being a crystal which is as a rhombic system with three orthogonal axes a, b and c of the crystal being defined such that their lengths are in the order of b>a>c, and having a crystal orientation such that the c-axis thereof extends substantially along the axis of said core, and (ii) a light source device for applying a fundamental which is linearly polarized in the direction of the a-axis of b-axis of the crystal which are normal to said c-axis, to said optical wavelength converter device.
Claim 5
Dependent Claim
97 words
An optical wavelength converter module comprising: (i) a fiber type optical wavelength converter device including cladding and a core filled in said cladding, said core being made of a monocrystalline nonlinear optical material represented by the following molecular diagram: ##STR4## said optical material having a crystal orientation such that the c-axis thereof extends substantially along the axis of said core, and (ii) a light source device for applying a fundamental which is linearly polarized in the direction of the a-axis or b-axis of the crystal which are normal to said c-axis to said optical wavelength converter device.
Claim 6
Dependent Claim
97 words
An optical wavelength converter module comprising: (i) a fiber type optical wavelength converter device including cladding and a core filled in said cladding, said core being made of a monocrystalline nonlinear optical material represented by the following molecular diagram: ##STR4## said optical material having a crystal orientation such that the c-axis thereof extends substantially along the axis of said core, and (ii) a light source device for applying a fundamental which is linearly polarized in the direction of the a-axis or b-axis of the crystal which are normal to said c-axis to said optical wavelength converter device.
References Cited (Backward Citations)
US4536450A
Cited
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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) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
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