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US 6,643,064 B2Granted
Optical signal interleaver
AssigneeIndustrial Technology Research Institute
InventorsChen-Bin Huang, Chieh Hu, Lih-Gen Sheu
Life of this patent
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Abstract
This specification discloses a light signal interleaver, which can separate a light signal into two light signals with a large interval in between. A birefringent plate is used as a light signal interleaver to separate all wavelengths in a light signal into an O-ray and an E-ray. Therefore, the invention can increase the total transmission capacity under the existent network structure.
Claims36
An optical signal interleaver to separate an incident beam with all wavelengths into an Even-wavelength ray and an Odd-wavelength ray for output, which comprises:
- a first polarization beam splitter/combiner, which splits the incident beam into two separate beams with orthogonal polarizations;
- a first polarization rotator, which rotates the polarization of one of the separate beams so as to get two beams with the same polarization;
- an optical signal interleaving mechanism, which interleaves the two beams with the same polarization to form two light signals, each having the Even-wavelength ray and the Odd-wavelength ray orthogonal in their polarizations;
- a polarization beam displacer, which displaces and separates each of the two light signals with the Even-wavelength ray and the Odd-wavelength ray orthogonal in their polarizations into an E-polarized signal and an O-polarized signal;
- a second polarization rotator, which rotates the polarizations of one of the Even-wavelength ray signals and the adjacent Odd-wavelength ray signals to be orthogonal to those of the other Even-wavelength ray signal and the other Odd-wavelength ray signal;
- a third polarization rotator, which rotates the polarizations of the two Even-wavelength ray signals or the two Odd-wavelength ray signals to be orthogonal to their original type;
- a second polarization beam splitter/combiner, which combines the Even-wavelength ray signals with orthogonal polarizations and the Odd-wavelength ray signals with orthogonal polarizations into the Even-wavelength ray and the Odd-wavelength ray, respectively, for output;
- and
- a beam angle deflector, which is disposed between the polarization beam displacer and the output position of the Even-wavelength ray and the Odd-wavelength ray to deflect the traveling direction of the optical signals passing through so that the Even-wavelength ray and the Odd-wavelength ray can enter a double optical fiber collimator.
6 more elements
An optical signal interleaver for connecting to a triple-core optical fiber collimator whose one port generates an incident beam with all wavelengths that is reflected after passing through the optical signal interleaver and becomes an Even-wavelength ray and an Odd-wavelength ray entering the other two ports of the triple-core optical fiber collimator, the optical signal interleaver comprising:
- a first beam angle deflector, which changes the angle that the incident enters the optical signal interleaver;
- a polarization beam splitter/combiner, which splits the incident beam into two separate beams with orthogonal polarizations;
- a first polarization rotator, which rotates the polarization of one of the separate beams so as to get two beams with the same polarization;
- a polarization beam displacer, which has a displacement direction orthogonal to the two beams with the same polarization;
- an optical signal interleaving mechanism, which interleaves the two beams with the same polarization to form two light signals, each having the Even-wavelength ray and the Odd-wavelength ray orthogonal in their polarizations;
- a spatial displacement reflector, which reflects the two light signals with the Even-wavelength ray and the Odd-wavelength ray orthogonal in their polarizations and produces spatial displacements;
- and
- a second beam angle deflector, which deflects the traveling direction of one of the Even-wavelength ray and the Odd-wavelength ray so that they can enter the other two ports of the triple-core optical fiber collimator;
- wherein the reflected light signals enter the optical signal interleaving mechanism to produce a desired spacing;
- the two optical signals are separated by the polarization beam displacer into an Even-wavelength ray signal and an Odd-wavelength ray signal, respectively;
- the polarization rotator rotates the polarizations of one of the Odd-wavelength ray signals and one of the Even-wavelength ray signals to be orthogonal to the polarizations of the other Odd-wavelength ray signal and the other Even-wavelength ray signal, respectively;
- and the beams pass through the polarization beam splitter/combiner to be combined into the Even-wavelength ray and the Odd-wavelength ray.
9 more elements
A four-port optical signal interleaving circulator comprising:
- a first polarization beam splitter/combiner, which splits the incident beam into two separate beams with orthogonal polarizations;
- a first polarization rotator, which rotates the polarization of one of the separate beams so as to get two beams with the same polarization;
- a first polarization beam displacer;
- a second polarization rotator which rotates a polarization of the two beams;
- a light signal interleaving mechanism, which interleaves the two beams with the same polarization to form two light signals, each having the Even-wavelength ray and the Odd-wavelength ray in their polarizations;
- a second polarization beam displacer;
- a third polarization rotator which rotates the polarizations of one of the Even-wavelength ray signals and the adjacent Odd-wavelength ray signal to be orthogonal to those of the other Even-wavelength ray signal and the other Odd-wavelength ray signal;
- a fourth polarization rotator which rotates the polarization of the two Even-wavelength ray signals or the two Odd-wavelength ray signals to be orthogonal to the original type;
- a beam angle deflector to deflect the traveling direction of the optical signals passing through;
- and
- a second polarization beam splitter/combiner which combines the Even-wavelength ray signals with the orthogonal polarizations and the Odd-wavelength ray signals with the orthogonal polarizations into the Even-wavelength ray and the Odd-wavelength ray, respectively for output.
8 more elements
A three-port optical signal interleaving bi-circulator, comprising:
- a first polarization beam splitter/combiner which splits the incident beam into two separate beams with orthogonal polarizations;
- a first polarization rotator, which rotates the polarization of one of the separate beams so as to get two beams with the same polarization;
- an optical signal interleaving mechanism, which interleaves the two beams with the same polarization to form two light signals, each having the Even-wavelength ray and the Odd-wavelength ray in their polarizations;
- a polarization beam displacer;
- a second polarization rotator which rotates the polarization of one of the Even-wavelength ray signals and the non-adjacent Odd-wavelength orthogonal to those of the other Even-wavelength ray signal and the other Odd-wavelength ray signal;
- a beam angle deflector;
- and
- a second polarization beam splitter/combiner which combines the Even-wavelength ray signals with orthogonal polarizations and the Odd-wavelength ray signals with orthogonal polarizations and to the Even-wavelength ray and the Odd-wavelength ray, respectively for output.
5 more elements
Dependencies are inferred from the claim text.