Patent EP0189196A2 successfully refreshed from Google Patents.
EP0189196A2
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EP
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Raman amplified filter tap system
Assignee: Polaroid Corp
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Filing: 1986-01-23
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Granted: —
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Expires: 2006-01-23
Abstract
Abstract A device for the Raman effect amplification of light energy includes a closed resonant loop defined by an optical fiber that includes a material having a characteristic Raman gain curve. The resonant loop is coupled to an optical trunk line that carries a plurality of wavelength-distinct information-bearing signals and removes and resonantly supports a portion of the light energy of a selected information-bearing signal from the trunk line. A laser is coupled to the resonant loop and introduces shorter wavelength pumping light energy into the loop to effect amplification of the resonantly supported information-bearing signal by the Raman effect. In another form, shorter wavelength pumping light energy is introduced into the laser so as to alter the output of the laser diode to effectively tune the pump line for amplifying a selected wavelength-distinct information-bearing signal.
Inventors
- 👤 John W. Hicks, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 11:56
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/30; H01S3/302
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
105 words
A device for filtering and amplifying light energy comprising: filter means defining an optical resonator adapted to be coupled to an optical transmission line propagating wavelength-distinct light energy and for resonantly supporting a selected wavelength coupled from the transmission line, said resonator means including a material having a characteristic Raman gain curve that varies as a function of the difference in wavelength between pumping light energy introduced therein and the selected wavelength resonantly supported in said resonator means; and means for introducing pumping light energy into said resonator for effecting amplification, by the Raman effect, of the selected wavelengths resonantly supported within said filter resonator.
Claim 2
Independent Claim
105 words
A device for filtering and amplifying light energy comprising: filter means defining an optical resonator adapted to be coupled to an optical transmission line propagating wavelength-distinct light energy and for resonantly supporting a selected wavelength coupled from the transmission line, said resonator means including a material having a characteristic Raman gain curve that varies as a function of the difference in wavelength between pumping light energy introduced therein and the selected wavelength resonantly supported in said resonator means; and means for introducing pumping light energy into said resonator for effecting amplification, by the Raman effect, of the selected wavelengths resonantly supported within said filter resonator.
Claim 3
Dependent Claim
19 words
The device of claim 1 wherein said filter means is a' resonant cavity defined by an optical fiber loop.
Claim 4
Dependent Claim
25 words
The device of claim 1 wherein said filter means is an optical fiber resonant cavity coupled to the optical transmission line through a lateral coupling.
Claim 5
Dependent Claim
39 words
The device of claim 1 wherein said pumping means comprises at least one laser source, and said at least one laser source provides pumping light energy to an optical fiber segment that is laterally coupled to said filter means.
Claim 6
Dependent Claim
24 words
The device of claim 1 wherein said Raman gain curve is less than the width of the spacing between orders of said filter means.
Claim 7
Dependent Claim
69 words
The device of claim 1 further comprising a laser source operative for providing pumping light energy at one or more of a plurality of distinct wavelengths, and resonant pumping means for resonantly supporting one resonant pumping means for resonantly supporting one of the plurality of said pumping light wavelengths and for providing the selected one thereof to said laser source to substantially confine,the output thereof to said one wavelength.
Claim 8
Dependent Claim
16 words
The device of claim 6 wherein said resonant pumping means comprises an optical fiber resonant loop.
Claim 9
Dependent Claim
30 words
The device of claim 6 further comprising means defining a feedback path through said resonant pumping means for feeding back pumping light from said filter means to said laser source.
Claim 10
Dependent Claim
26 words
The device of claim 8 further comprising wavelength selective means in said feedback path for selectively passing the pumping light wavelengths to said resonant pumping means.
Claim 11
Dependent Claim
34 words
The device of claim 8 wherein said feedback path comprises an optical transmission path extending between said filter means and said laser for passing pumping light wavelengths from said resonator means to said laser.
Claim 12
Dependent Claim
21 words
The device of claim 10 wherein said feedback path further comprises a wavelength selective lateral couple for passing pumping light wavelengths.
Claim 13
Dependent Claim
30 words
The device of claim 11 wherein said feedback path further comprises a pumping light resonator in said optical transmission path between said wavelength selective lateral couple and said laser diode.
Claim 14
Dependent Claim
30 words
The device of claim 12 wherein said pumping light resonator comprises an optical fiber loop having characteristics which resonantly support the pumping light passed through said wavelength selective lateral couple.
Claim 15
Independent Claim
116 words
A device for filtering and amplifying light energy, said device comprising: filter means comprising an optical resonator cavity adapted to be coupled to an optical transmission line for resonantly supporting at least one select wavelength propagating in the transmission line, said resonator cavity including a material capable of amplifying at least said-one resonant wavelength upon pumping of said resonator cavity by light energy of a wavelength related to, but shifted from, the wavelength to be amplified; a pumping light source operative for pumping light energy at one or more of a plurality of distinct wavelengths; and means for defining a feedback path for feeding back pumping light energy from said filter means to said light source.
Claim 16
Independent Claim
116 words
A device for filtering and amplifying light energy, said device comprising: filter means comprising an optical resonator cavity adapted to be coupled to an optical transmission line for resonantly supporting at least one select wavelength propagating in the transmission line, said resonator cavity including a material capable of amplifying at least said-one resonant wavelength upon pumping of said resonator cavity by light energy of a wavelength related to, but shifted from, the wavelength to be amplified; a pumping light source operative for pumping light energy at one or more of a plurality of distinct wavelengths; and means for defining a feedback path for feeding back pumping light energy from said filter means to said light source.
Claim 17
Dependent Claim
27 words
The device of claim 14 wherein said feedback path includes an optical fiber loop having characteristics which resonantly support the pumping light energy provided by said source.
Claim 18
Independent Claim
185 words
A device for filtering and amplifying light energy, said device comprising: filter means comprising an optical resonator cavity adapted to be coupled to an optical transmission line for resonantly supporting wavelengths propagating in said transmission line, said resonator cavity including a material capable of amplifying one or more of its resonant wavelengths upon pumping of said resonator cavity by light energy on one or more of a plurality of select wavelengths; a pumping light source operative for pumping light energy into said resonator cavity at one or more of said plurality of select wavelengths, said light source being constructed and adapted for producing substantially one dominant frequency in accordance with a select input frequency; and pump input means for selectively supplying one of said plurality of select frequencies to said source, said pump input means comprising a transmission line carrying said plurality of select frequencies, an optical pump input resonant cavity coupled between said transmission line and said light source for resonating one of said select frequencies and for coupling said one frequency to said source to essentially confine said source to said one frequency.
Claim 19
Independent Claim
185 words
A device for filtering and amplifying light energy, said device comprising: filter means comprising an optical resonator cavity adapted to be coupled to an optical transmission line for resonantly supporting wavelengths propagating in said transmission line, said resonator cavity including a material capable of amplifying one or more of its resonant wavelengths upon pumping of said resonator cavity by light energy on one or more of a plurality of select wavelengths; a pumping light source operative for pumping light energy into said resonator cavity at one or more of said plurality of select wavelengths, said light source being constructed and adapted for producing substantially one dominant frequency in accordance with a select input frequency; and pump input means for selectively supplying one of said plurality of select frequencies to said source, said pump input means comprising a transmission line carrying said plurality of select frequencies, an optical pump input resonant cavity coupled between said transmission line and said light source for resonating one of said select frequencies and for coupling said one frequency to said source to essentially confine said source to said one frequency.
Claim 20
Dependent Claim
16 words
The device of claim 16 wherein said input resonant cavity consists of an optical fiber cavity.
Claim 21
Dependent Claim
39 words
The device of claim 16 wherein said source is a laser source having a laser cavity, and said input cavity is coupled to said laser cavity to introduce the resonant wavelength of said input cavity to said laser cavity.
References Cited (Backward Citations)
No citation records indexed.
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