US5337401A
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US
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Optical functioning glass and method of manufacturing same, optical fiber, waveguide device, and laser device
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1991-10-24
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Granted: 1994-08-09
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Expires: 2011-10-24
Abstract
Abstract An optically active device comprising an optical fiber, a light source and a coupler is disclosed. The optical fiber has a core made of a silicate glass containing Rb and/or Cs oxide. The core is doped with Nd3+ as an active ion and transmits light at 1.3 mu m band. The light source generates excitation light at 0.8 mu m. The coupler directs the excitation light from the light source into the core of the optical fiber. A signal light or a spontaneous light at 1.3 mu m band which is transmitted in the core stimulates Nd3+ to emit light at 1.3 mu m band. As a result an optical function such as optical amplification can be effected at 1.3 mu m band.
Inventors
- 👤 Masashi Onishi
- 👤 Koji Nakazato
- 👤 Yoshiki Chigusa
- 👤 Minoru Watanabe
- 👤 Yoshiaki Miyajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:21
CPC Classifications
C; C03; C03C; C03C4/00; H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/0632; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C03C3/00; C03C3/04; C03C3/076; C03C3/095; C03C3/12; C03C3/16; C03C4/0071; H01S3/067; H01S3/06708; H01S3/06716; H01S2302/00; H01S2303/00; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1611; H01S3/1691
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
51 words
An optical fiber comprising: a core made of an optical functioning glass, said optical functioning glass being an oxide-based optical functioning glass containing Nd 3+ as an active ion doped in a host glass, wherein the host glass contains at least one element from the group consisting of Rb and Cs.
Claim 2
Dependent Claim
51 words
An optical fiber comprising: a core made of an optical functioning glass, said optical functioning glass being an oxide-based optical functioning glass containing Nd 3+ as an active ion doped in a host glass, wherein the host glass contains at least one element from the group consisting of Rb and Cs.
Claim 3
Dependent Claim
48 words
An optically active device comprising: an optical fiber according to claim 1, a light source for generating excitation light at a 0.80-μm wavelength band or a band near the 0.80-μm wavelength band; and optical means for directing the excitation light from said light source to said optical fiber.
Claim 4
Dependent Claim
36 words
A fiber amplifier comprising: an optically active device according to claim 2; and coupling means for coupling signal light at a 1.3-μm wavelength band or a band near the 1.3-μm wavelength band into said optical fiber.
Claim 5
Dependent Claim
40 words
A fiber laser comprising: an optically active device according to claim 2; and resonator means for feeding light at a 1.3-μm wavelength band or a band near the 1.3-μm wavelength band from said optical fiber back to said optical fiber.
Claim 6
Dependent Claim
50 words
A waveguide device comprising a planar waveguide made of an optical functioning glass which is an oxide-based optical functioning glass containing Nd 3+ as an active ion doped in a host glass, wherein the host glass contains at least one element selected from the group consisting of Rb and Cs.
Claim 7
Dependent Claim
50 words
A waveguide device comprising a planar waveguide made of an optical functioning glass which is an oxide-based optical functioning glass containing Nd 3+ as an active ion doped in a host glass, wherein the host glass contains at least one element selected from the group consisting of Rb and Cs.
Claim 8
Dependent Claim
24 words
A device according to claim 5, wherein said device propagates light at a 1.3-μm wavelength band or a band near the 1.3-μm wavelength band.
Claim 9
Dependent Claim
40 words
An optically active device comprising: a waveguide device according to claim 5; a light source for generating excitation light for exciting Nd 3+ ; and optical means for directing the excitation light from said light source to said planar waveguide.
Claim 10
Dependent Claim
48 words
An optically active device comprising: a waveguide device according to claim 6; a light source for generating excitation light at a 0.80-μm wavelength band or a band near the 0.80-μm wavelength band; and optical means for directing the excitation light from said light source to said planar waveguide.
Claim 11
Dependent Claim
36 words
A waveguide amplifier comprising: an optically active device according to claim 8; and coupling means for coupling signal light at a 1.3-μm wavelength band or a band near the 1.3-μm wavelength band to said planar waveguide.
Claim 12
Dependent Claim
40 words
A waveguide laser comprising: an optically active device according to claim 8; and resonator means for feeding light at a 1.3-μm wavelength band or a band near the 1.3-μm wavelength band from said planar waveguide back to said planar waveguide.
Claim 13
Dependent Claim
71 words
An oxide-based optical functioning glass containing Nd 3+ as an active ion doped in a host glass, wherein the host glass contains Rb of which amount is sufficient to cause a shift in the ESA peak wavelength in optical amplification and optical oscillation at the 1.3 μm wavelength band, when a light of 1.3 μm wavelength band and a light of 0.8 μm wavelength band enter thereinto at the same time.
Claim 14
Dependent Claim
71 words
An oxide-based optical functioning glass containing Nd 3+ as an active ion doped in a host glass, wherein the host glass contains Rb of which amount is sufficient to cause a shift in the ESA peak wavelength in optical amplification and optical oscillation at the 1.3 μm wavelength band, when a light of 1.3 μm wavelength band and a light of 0.8 μm wavelength band enter thereinto at the same time.
Claim 15
Dependent Claim
77 words
An oxide-based functioning glass comprising: a host glass containing Cs; and Nd 3+ , as an active ion, doped in said host glass, wherein the amount of Cs contained in the host glass is sufficient to cause a shift in ESA peak wavelength in optical amplification and optical oscillation at the 1.3 μm wavelength band, when a light of 1.3 μm wavelength band and a light of 0.8 μm wavelength band enter thereinto at the same time.
Claim 16
Dependent Claim
77 words
An oxide-based functioning glass comprising: a host glass containing Cs; and Nd 3+ , as an active ion, doped in said host glass, wherein the amount of Cs contained in the host glass is sufficient to cause a shift in ESA peak wavelength in optical amplification and optical oscillation at the 1.3 μm wavelength band, when a light of 1.3 μm wavelength band and a light of 0.8 μm wavelength band enter thereinto at the same time.
Claim 17
Dependent Claim
81 words
An oxide-based functioning glass comprising: a host glass containing Cs and Rb; and Nd 3+ , as an active ion, doped in said host glass, wherein the amount of Cs and Rb contained in the host glass is sufficient to cause a shift in ESA peak wavelength in optical amplification and optical oscillation at the 1.3 μm wavelength band, when a light of 1.3 μm wavelength band and a light of 0.8 μm wavelength band enter thereinto at the same time.
Claim 18
Dependent Claim
81 words
An oxide-based functioning glass comprising: a host glass containing Cs and Rb; and Nd 3+ , as an active ion, doped in said host glass, wherein the amount of Cs and Rb contained in the host glass is sufficient to cause a shift in ESA peak wavelength in optical amplification and optical oscillation at the 1.3 μm wavelength band, when a light of 1.3 μm wavelength band and a light of 0.8 μm wavelength band enter thereinto at the same time.
Claim 19
Dependent Claim
26 words
An oxide-based functioning glass according to claim 12, wherein said host glass further contains an alkaline-earth element selected from the group consisting of Mg and Ca.
Claim 20
Dependent Claim
54 words
An optical waveguide, comprising: an oxide-based optical functioning glass including a host glass containing Cs and Rb, and Nd 3+ , as an active ion, doped in said host glass; and a cladding material having a lower refractive index than that of the optical functioning glass, at least partially surrounding the optical functioning glass.
Claim 21
Dependent Claim
54 words
An optical waveguide, comprising: an oxide-based optical functioning glass including a host glass containing Cs and Rb, and Nd 3+ , as an active ion, doped in said host glass; and a cladding material having a lower refractive index than that of the optical functioning glass, at least partially surrounding the optical functioning glass.
Claim 22
Dependent Claim
21 words
An optical waveguide according to claim 15 wherein the said waveguide propagates light at or near the 1.3 μm wavelength band.
Claim 23
Dependent Claim
92 words
An optically active device comprising: a light source for generating excitation light; an optical waveguide including an oxide-based optical functioning glass, said optical functioning glass including a host glass containing Cs and Rb, and Nd 3+ , as an active ion, doped in said host glass, and a cladding material, having a lower refractive index than that of the optical functioning glass, at least partially surrounding the optical functioning glass; and optical means for directing said excitation light from said light source to said optical waveguide for exciting said Nd 3+ ions.
Claim 24
Dependent Claim
92 words
An optically active device comprising: a light source for generating excitation light; an optical waveguide including an oxide-based optical functioning glass, said optical functioning glass including a host glass containing Cs and Rb, and Nd 3+ , as an active ion, doped in said host glass, and a cladding material, having a lower refractive index than that of the optical functioning glass, at least partially surrounding the optical functioning glass; and optical means for directing said excitation light from said light source to said optical waveguide for exciting said Nd 3+ ions.
Claim 25
Dependent Claim
23 words
An optically active device as in claim 17, wherein said light source generates excitation light at or near the 0.8 μm wavelength band.
Claim 26
Dependent Claim
118 words
An optical amplifier comprising: an optical waveguide including an oxide-based optical functioning glass, said optical functioning glass including a host glass containing Cs and Rb, and Nd 3+ , as an active ion, doped in said host glass; and a cladding material; wherein the cladding material has a lower refractive index than that of the optical functioning glass, at least partially surrounding the optical functioning glass; a light source for generating excitation light at or near the 0.8 μm wavelength band; optical means for directing the excitation light into the optical waveguide; and coupling means for directing an input signal light into the optical waveguide, said input signal light being at or near the 1.3 μm wavelength band.
Claim 27
Dependent Claim
118 words
An optical amplifier comprising: an optical waveguide including an oxide-based optical functioning glass, said optical functioning glass including a host glass containing Cs and Rb, and Nd 3+ , as an active ion, doped in said host glass; and a cladding material; wherein the cladding material has a lower refractive index than that of the optical functioning glass, at least partially surrounding the optical functioning glass; a light source for generating excitation light at or near the 0.8 μm wavelength band; optical means for directing the excitation light into the optical waveguide; and coupling means for directing an input signal light into the optical waveguide, said input signal light being at or near the 1.3 μm wavelength band.
Claim 28
Dependent Claim
117 words
A laser comprising: a light source for generating excitation light at or near the 0.8 μm wavelength band; an optical waveguide including an oxide-based optical functioning glass; wherein said optical functioning glass includes a host glass containing Cs and Rb, and further includes Nd 3+ , as an active ion, doped in said host glass; and a cladding material; wherein the cladding material has a lower refractive index than that of the optical functioning glass, at least partially surrounding the optical functioning glass; optical means for directing the excitation light into the optical waveguide; and resonator means for feeding light at or near the 1.3μm wavelength band emitted by said optical waveguide back into the optical waveguide.
Claim 29
Dependent Claim
117 words
A laser comprising: a light source for generating excitation light at or near the 0.8 μm wavelength band; an optical waveguide including an oxide-based optical functioning glass; wherein said optical functioning glass includes a host glass containing Cs and Rb, and further includes Nd 3+ , as an active ion, doped in said host glass; and a cladding material; wherein the cladding material has a lower refractive index than that of the optical functioning glass, at least partially surrounding the optical functioning glass; optical means for directing the excitation light into the optical waveguide; and resonator means for feeding light at or near the 1.3μm wavelength band emitted by said optical waveguide back into the optical waveguide.
Claim 30
Independent Claim
77 words
A method of manufacturing an oxide-based optical functioning glass containing Nd 3+ as an active ion doped in a host glass, comprising the steps of: preparing a host glass by melting selected oxides, said oxides including at least SiO 2 , Na 2 O, and Cs 2 O selected from the group consisting of SiO 2 , Na 2 O, Cs 2 O, and Rb 2 O; and doping the resulting host glass with Nd 3+ .
Claim 31
Independent Claim
77 words
A method of manufacturing an oxide-based optical functioning glass containing Nd 3+ as an active ion doped in a host glass, comprising the steps of: preparing a host glass by melting selected oxides, said oxides including at least SiO 2 , Na 2 O, and Cs 2 O selected from the group consisting of SiO 2 , Na 2 O, Cs 2 O, and Rb 2 O; and doping the resulting host glass with Nd 3+ .
Claim 32
Dependent Claim
41 words
A method of manufacturing an oxide-based optical functioning glass according to claim 21, wherein the total concentration of the oxides Rb 2 O and Cs 2 O falls within a range from about 5 mol % to about 45 mol %.
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