EP0322847A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Second harmonic wave generating device having active layer and second harmonic wave generating layer on same substrate
Assignee: Canon Inc
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Filing: 1988-12-27
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Granted: —
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Expires: 2008-12-27
Abstract
Abstract A second harmonic wave generating device comprises: a substrate (33); an active layer (34) formed on said substrate and adapted for generating light of a wavelength lambda in response to the injection of a current; a layer (31) of a second harmonic wave generating material formed on the substrate and adapted for generating light of a wavelength lambda /2 from the light generated in the active layer; and a pair of electrodes (35,36) for supplying the active layer with a current.
Inventors
- 👤 Akira Shimizu
- 👤 Sotomitsu Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 14:16
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/10; H01S5/1028; H01S5/12; H01S5/005; H01S5/0092; H01S5/02; H01S5/028; H01S5/04; H01S5/042; H01S5/0421; H01S5/0422; H01S5/0424; H01S5/06; H01S5/0604; H01S5/1032; H01S5/1035; H01S5/20; H01S5/22; H01S5/223; H01S5/2231; H01S5/227; H01S5/2275
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
76 words
A second harmonic wave generating device comprising: a substrate; an active layer formed on said substrate and adapted for generating light of a wavelength λ in response to the injection of a current; a layer of a second harmonic wave generating material formed on said substrate and adapted for generating light of a wavelength λ/2 from the light generated in said active layer; and a pair of electrodes for supplying said active layer with a current.
Claim 2
Dependent Claim
76 words
A second harmonic wave generating device comprising: a substrate; an active layer formed on said substrate and adapted for generating light of a wavelength λ in response to the injection of a current; a layer of a second harmonic wave generating material formed on said substrate and adapted for generating light of a wavelength λ/2 from the light generated in said active layer; and a pair of electrodes for supplying said active layer with a current.
Claim 3
Dependent Claim
15 words
A device according to claim 1, comprising a laser oscillator structure including said active layer.
Claim 4
Dependent Claim
47 words
A device according to claim 2, comprising a pair of end faces constituting a laser oscillator, wherein said end faces are provided with a coating for confining the light of said wavelength λ within the oscillator and taking out the light of wavelength λ/2 from the device.
Claim 5
Dependent Claim
68 words
A device according to claim 2, wherein said active layer is formed in a stripe shape extended in the direction of oscillation, and layers of said second harmonic wave generating material are positioned on both sides of the active layer, in a direction perpendicular to the direction of oscillation and in a position substantially same as that of the active layer in the direction of thickness of layer.
Claim 6
Dependent Claim
32 words
A device according to claim 2, further comprising a clad layer formed on said active layer and provided with a ridge portion extended, in a stripe form, in the direction of oscillation.
Claim 7
Dependent Claim
52 words
A device according to claim 5, wherein layers of said second harmonic wave generating material are positioned on both sides of the ridge portion, in a direction perpendicular to the direction of oscillation and in a position substantially same as that of said ridge portion in the direction of thickness of layer.
Claim 8
Dependent Claim
30 words
A device according to claim 5, wherein a part of said ridge portion in the direction of oscillation is replaced by a layer of said second harmonic wave generating material.
Claim 9
Dependent Claim
71 words
A device according to claim 1, wherein said active layer and said layer of second harmonic wave generating material are laminated on the substrate, and further comprising a first diffraction grating for diffracting the light of wavelength λ generated in said active layer toward the layer of second harmonic wave generating material, and a second diffraction grating for coupling thus diffracted light with the layer of second harmonic wave generating material.
Claim 10
Dependent Claim
53 words
A device according to claim 8, wherein the pitch Λ₁ of said first diffraction grating satisfies: Λ₁ = ℓ·(λ/2 n ) in which n is the effective refractive index for the light of wavelength λ in the area of said diffraction grating, and ℓ is an integer equal to or larger than 1.
Claim 11
Dependent Claim
45 words
A device according to claim 9, wherein the pitch Λ₂ of said second diffraction grating satisfies a relation: Λ₂ = ℓ·(λ/2 n ′) in which n ′ is the effective refractive index for the light of wavelength λ in the area of said diffraction grating.
Claim 12
Dependent Claim
52 words
A device according to claim 10, wherein a part of said second diffraction grating has a pitch Λ₃ satisfying a relation: Λ₃= ℓ′·(λ/2)2 n ˝ in which n ˝ is the effective refractive index in the area of said diffraction grating, and ℓ′ is an integer equal to or larger than 1.
Claim 13
Dependent Claim
33 words
A device according to claim 8, wherein said active layer contains of a III-V group compound semiconductor, and said layer of second harmonic wave generating material contains of a II-VI group compound semiconductor.
Claim 14
Dependent Claim
15 words
A device according to claim 8, comprising a laser oscillator structure including said active layer.
Claim 15
Dependent Claim
47 words
A device according to claim 13, comprising a pair of end faces constituting a laser oscillator, wherein said end faces are provided with a coating for confining the light of said wavelength λ within the oscillator and taking out the light of wavelength λ/2 from the device.
Claim 16
Dependent Claim
27 words
A device according to claim 13, wherein one of said electrodes is provided with a contact portion extended, in a stripe form, along the direction of oscillation.
Claim 17
Dependent Claim
29 words
A device according to claim 13, wherein said layer of second harmonic wave generating material constitutes a ridge portion of a stripe form extended in the direction of oscillation.
Claim 18
Dependent Claim
21 words
A device according to claim 16, wherein one of said electrodes is in contact on the top of said ridge portion.
Claim 19
Dependent Claim
25 words
A device according to claim 16, wherein one of said electrodes is in contact on both sides in the lower part of said ridge portion.
Claim 20
Dependent Claim
24 words
A device according to claim 16, wherein a p-n junction is formed in said active layer by one-side impurity diffusion from said ridge portion.
Claim 21
Dependent Claim
30 words
A device according to claim 18, wherein said active layer and said layer of second harmonic wave generating material are respectively sandwiched by clad layers to constitute a wave guide.
Claim 22
Dependent Claim
15 words
A device according to claim 1, further comprising a power source connected to said electrodes.
References Cited (Backward Citations)
No citation records indexed.
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