CA2466850A1 - Method and apparatus for measuring polarization-mode dispersion - Google Patents
Method and apparatus for measuring polarization-mode dispersion Download PDFInfo
- Publication number
- CA2466850A1 CA2466850A1 CA 2466850 CA2466850A CA2466850A1 CA 2466850 A1 CA2466850 A1 CA 2466850A1 CA 2466850 CA2466850 CA 2466850 CA 2466850 A CA2466850 A CA 2466850A CA 2466850 A1 CA2466850 A1 CA 2466850A1
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- laser beam
- pump laser
- polarization
- pump
- laser
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
- G01M11/336—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face by measuring polarization mode dispersion [PMD]
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Optics & Photonics (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Semiconductor Lasers (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Polarization-mode dispersion (PMD) of an optical device, i.e. fiber or component is effected by launching a first pump laser beam of a fixed wavelength, a probe laser beam with a second fixed wavelength and a second pump laser beam having a variable wavelength and a polarization direction orthogonal to the other two beams into an optical device to generate three output signals which are input into a semiconductor optical amplifier to generate flour-wave mixing (FWM) products. The average PMD of the device is computed by measuring the power of the FWM products versus the wavelength of the second pump laser beam.
Claims (10)
1. A method of determining the polarization-mode dispersion in an optical device comprising the steps of:
generating a first pump laser beam with a fixed wavelength;
generating a probe laser beam with a second fixed wavelength and the same input polarization direction as said first pump laser beam;
generating a second pump laser beam having a variable wavelength and a polarization direction orthogonal to the first pump laser beam and the probe laser beam;
launching the first and second pump laser beams and said probe laser beam into an optical device to generate three output signals;
inputting the three output signals into a semiconductor optical amplifier to generate four-wave mixing products dependent upon the polarization-mode dispersion of the device; and computing the average polarization-mode dispersion of the device by measuring the power of the four-wave mixing products versus the wavelength of the second pump laser beam.
generating a first pump laser beam with a fixed wavelength;
generating a probe laser beam with a second fixed wavelength and the same input polarization direction as said first pump laser beam;
generating a second pump laser beam having a variable wavelength and a polarization direction orthogonal to the first pump laser beam and the probe laser beam;
launching the first and second pump laser beams and said probe laser beam into an optical device to generate three output signals;
inputting the three output signals into a semiconductor optical amplifier to generate four-wave mixing products dependent upon the polarization-mode dispersion of the device; and computing the average polarization-mode dispersion of the device by measuring the power of the four-wave mixing products versus the wavelength of the second pump laser beam.
2. The method of claim 1, wherein there is a fixed optical frequency difference between the first pump laser beam and the probe laser beam.
3. The method of claim 1, wherein said first pump laser, probe laser and second pump laser beams are passed through a polarization beam splitter before being launched into an optical device.
4. The method of claim 3, wherein said first pump laser, said probe laser and said second pump laser beams exiting said beam splitter are passed through an isolator to ensure unidirection travel of the beams.
5. The method of claim 4, wherein said first pump laser, said probe laser and said second pump laser beams are passed through a two-by-two switch before being launched into an optical device, and the output signals from the optical device are directed through the switch to the semiconductor optical amplifier.
6. An apparatus for determining the polarization-mode dispersion in an optical device comprising:
first laser means for generating a first pump laser beam with a fixed wavelength;
second, probe laser means for generating a probe laser beam with a second fixed wavelength and the same input polarization direction as said first pump laser beam;
third laser means for generating a second pump laser beam having a variable wavelength and a polarization direction orthogonal to the first pump laser beam and the probe laser beam;
polarization beam splitter means for receiving said first pump, said probe and said second pump beams, and relaying said beams through an optical device under test to generate three output signals;
semiconductor optical amplifier means for receiving said output signals and generating four-wave mixing products dependent upon the polarization-mode dispersion of the device; and analyzer means for computing the polarization-mode dispersion of the device under test by measuring the power of the four-wave mixing products versus the wavelength of the second pump laser beam.
first laser means for generating a first pump laser beam with a fixed wavelength;
second, probe laser means for generating a probe laser beam with a second fixed wavelength and the same input polarization direction as said first pump laser beam;
third laser means for generating a second pump laser beam having a variable wavelength and a polarization direction orthogonal to the first pump laser beam and the probe laser beam;
polarization beam splitter means for receiving said first pump, said probe and said second pump beams, and relaying said beams through an optical device under test to generate three output signals;
semiconductor optical amplifier means for receiving said output signals and generating four-wave mixing products dependent upon the polarization-mode dispersion of the device; and analyzer means for computing the polarization-mode dispersion of the device under test by measuring the power of the four-wave mixing products versus the wavelength of the second pump laser beam.
7. The apparatus of claim 6 including two-by-two switch means for connecting an optical device under test to said beam splitter means and said semiconductor optical amplifier means.
8. The apparatus of claim 7 including optical isolator means between said beam splitter means and said switch means for ensuring unidirectional operation of the apparatus.
9. The apparatus of claim 8 including a pair of interconnected fiber semiconductor ring cavity laser means incorporating said polarization beam splitter means; second semiconductor optical amplifier means in each said ring cavity laser means; and coupler means at the intersection of said ring for feeding beams from said ring cavity laser means to said first optical isolator means.
10. The apparatus of claim 9 including dual-wavelength filter means and tunable filter means in said ring cavity laser means; and polarization controller means and beam splitter means in each said ring cavity laser means for creating said first pump laser, said probe laser and said second pump laser beams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2466850 CA2466850C (en) | 2004-05-11 | 2004-05-11 | Method and apparatus for measuring polarization-mode dispersion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2466850 CA2466850C (en) | 2004-05-11 | 2004-05-11 | Method and apparatus for measuring polarization-mode dispersion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2466850A1 true CA2466850A1 (en) | 2005-11-11 |
| CA2466850C CA2466850C (en) | 2011-04-12 |
Family
ID=35452055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2466850 Expired - Fee Related CA2466850C (en) | 2004-05-11 | 2004-05-11 | Method and apparatus for measuring polarization-mode dispersion |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2466850C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384836A (en) * | 2010-09-01 | 2012-03-21 | 中国科学院光电研究院 | Laser multi-parameter real-time measuring device |
| CN113218637A (en) * | 2021-06-08 | 2021-08-06 | 中国工程物理研究院激光聚变研究中心 | Method for acquiring harmonic conversion efficiency curve of full laser power section |
-
2004
- 2004-05-11 CA CA 2466850 patent/CA2466850C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384836A (en) * | 2010-09-01 | 2012-03-21 | 中国科学院光电研究院 | Laser multi-parameter real-time measuring device |
| CN102384836B (en) * | 2010-09-01 | 2014-01-29 | 中国科学院光电研究院 | Laser multi-parameter real-time measuring device |
| CN113218637A (en) * | 2021-06-08 | 2021-08-06 | 中国工程物理研究院激光聚变研究中心 | Method for acquiring harmonic conversion efficiency curve of full laser power section |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2466850C (en) | 2011-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20130513 |