CA2344750A1 - Full combined c and l bands optical amplifier and method - Google Patents
Full combined c and l bands optical amplifier and method Download PDFInfo
- Publication number
- CA2344750A1 CA2344750A1 CA 2344750 CA2344750A CA2344750A1 CA 2344750 A1 CA2344750 A1 CA 2344750A1 CA 2344750 CA2344750 CA 2344750 CA 2344750 A CA2344750 A CA 2344750A CA 2344750 A1 CA2344750 A1 CA 2344750A1
- Authority
- CA
- Canada
- Prior art keywords
- optical
- optical signal
- path
- paths
- polarization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/25—Distortion or dispersion compensation
- H04B2210/258—Distortion or dispersion compensation treating each wavelength or wavelength band separately
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
An optical amplifier for two adjacent bands of optical data channels provides gain across the entire spectrum; including the so-called dead-band, by splitting the entire input signal equally into two paths. One path is optimized to amplify one band and the other path is optimized to amplify the other. An optical delay in one path, usually the one optimized for the lower wavelength band, ensures equal optical path lengths for the two paths. The amplified signals in that two paths are then combined to yield or flat gain profile across the two bands and the gap in-between.
Claims (18)
1. An optical signal amplifier for amplifying at least first and second bands of optical data channels separated by a band gap having spectral width substantially less than each band's spectral width, comprising:
(a) optical signal sputter means at an input of said amplifier for splitting signals in said at least first and second bands and said band gap into first and second paths, (b) first optical signal gain means in said first path for amplifying said fist band;
(c) second signal gain means in said second path for amplifying said second band;
(d) optical signal combiner means for combining signals amplified by said first and second optical signal gain means onto an output of said amplifier.
(a) optical signal sputter means at an input of said amplifier for splitting signals in said at least first and second bands and said band gap into first and second paths, (b) first optical signal gain means in said first path for amplifying said fist band;
(c) second signal gain means in said second path for amplifying said second band;
(d) optical signal combiner means for combining signals amplified by said first and second optical signal gain means onto an output of said amplifier.
2. The optical signal amplifier as defined in claim 1, wherein said first and second optical paths are equal for both said fist and second bands.
3. The optical signal amplifier as defined in claim 1, further comprising:
{e) a predetermined optical delay line in a predetermined one of said first and second optical paths.
{e) a predetermined optical delay line in a predetermined one of said first and second optical paths.
4. The optical signal amplifier as defined in claim 1, wherein said optical signal sputter means is a polarization mean sputter means, and said optical signal combiner means is a polarization mean combiner means.
5. The optical signal amplifier as defined in claim 2, wherein said optical signal sputter means is a polarization mean splitter means, and said optical signal combiner means is a polarization mean combiner means.
6. The optical signal amplifier as defined in claim 3, wherein said optical signal splitter means is a polarization mean sputter means, and said optical signal combiner means is a polarization mean combiner means.
7. The optical signal amplifier as defined in claim 4, wherein said first and second optical signal gain means are polarization maintaining fiber amplifiers.
8. The optical signal amplifier as defined in claim 5, wherein said first and second optical signal gain means are polarization maintaining fiber amplifiers.
9. The optical signal amplifier as defined in claims 6, wherein said first and second optical signal gain means are polarization maintaining fiber amplifiers.
10. The optical signal amplifier as defined in claim 7, further comprising first and second linear polarizers, the first in the first optical path and the second in the second optical path.
11. The optical signal amplifier as defined in claim 8, further comprising first and second linear polarizers, the first in the first optical path and the second in the second optical path.
12. The optical signal amplifier as defined in claim 9, further comprising first and second linear polarizers, the first in the first optical path and the second in the second optical path.
13. A method for amplifying two adjacent bands of optical data channels separated by a band gap, comprising the steps of:
(a) splitting all optical signals in said two adjacent bands and said band gap into first and second optical paths;
(b) separately amplifying optical signals in said fist and second optical paths;
and (c) combining the amplified optical signals in said fist and second optical paths into a single path.
(a) splitting all optical signals in said two adjacent bands and said band gap into first and second optical paths;
(b) separately amplifying optical signals in said fist and second optical paths;
and (c) combining the amplified optical signals in said fist and second optical paths into a single path.
14. The method as defined in claim 13, further comprising an intermediate step of delaying optical signals in a predetermined on of the first and second optical paths by a predetermined amount.
15. The method as defined in claim 14, wherein step (a) is carried out by means of a polarization beam splitter and step (c) is carried out by means of a polarization beam combiner.
16. The method as defined in claim 15, wherein step (b) is carried out by means of two separate polarization maintaining fiber amplifiers.
17. The method as defined in claim 16, further comprising the step of linearly polarizing the optical signals in said first and second optical paths.
18. The method as defined in claim 17, wherein the step of linearly polarizing is carried out by means of two linear polarizers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2344750 CA2344750C (en) | 2001-04-18 | 2001-04-18 | Full combined c and l bands optical amplifier and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2344750 CA2344750C (en) | 2001-04-18 | 2001-04-18 | Full combined c and l bands optical amplifier and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2344750A1 true CA2344750A1 (en) | 2002-10-18 |
| CA2344750C CA2344750C (en) | 2010-11-02 |
Family
ID=4168886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2344750 Expired - Fee Related CA2344750C (en) | 2001-04-18 | 2001-04-18 | Full combined c and l bands optical amplifier and method |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2344750C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018089123A1 (en) * | 2016-11-10 | 2018-05-17 | Google Inc. | Overlapping spectrum amplification |
-
2001
- 2001-04-18 CA CA 2344750 patent/CA2344750C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018089123A1 (en) * | 2016-11-10 | 2018-05-17 | Google Inc. | Overlapping spectrum amplification |
| US9998806B2 (en) | 2016-11-10 | 2018-06-12 | Google Llc | Overlapping spectrum amplification |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2344750C (en) | 2010-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20170418 |