Three-port optical circulator
First Claim
1. A circulator comprising:
- a first collimator, a second collimator, and first, second and third ports, said first collimator defining the second port, said second collimator defining the first port and the third port, and a non-reciprocal section positioned between said first collimator and said second collimator;
said non-reciprocal section including;
a first isolator section and a complementary second isolator section commonly defining a forward path and a backward path thereof, whereby a forward light beam may enter the circulator from the first port of the second collimator, through the forward path and leave from the second port;
in opposite, a backward light beam may enter the circulator from the second port, through the backward path and leave from the third port, wherein the forward path and the backward path are different from each other;
wherein a non-birefringent deflecting device is provided between the first isolator section and the second isolator section.
1 Assignment
0 Petitions
Accused Products
Abstract
A circulator (10) includes a first collimating device (12) and a second collimating device (16) with three external optic fibers (14), (18) & (20) thereon wherein the first fiber (18) and the third fiber (20) are coupled to the second collimating device (16) while the second fiber (14) is coupled to the first collimating device (12). A non-reciprocal section (22) is positioned between the first collimating device (12) and the second collimating device (16). The non-reciprocal section (22) includes a first optic isolator section (24) and a second optic isolator section (26) commonly sandwiching a first light deflecting device (28) therebetween, and a second light deflecting device (30) being positioned between the second optic isolator section (26) and the second collimating device (16).
24 Citations
25 Claims
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1. A circulator comprising:
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a first collimator, a second collimator, and first, second and third ports, said first collimator defining the second port, said second collimator defining the first port and the third port, and a non-reciprocal section positioned between said first collimator and said second collimator;
said non-reciprocal section including;
a first isolator section and a complementary second isolator section commonly defining a forward path and a backward path thereof, whereby a forward light beam may enter the circulator from the first port of the second collimator, through the forward path and leave from the second port;
in opposite, a backward light beam may enter the circulator from the second port, through the backward path and leave from the third port, wherein the forward path and the backward path are different from each other;
wherein a non-birefringent deflecting device is provided between the first isolator section and the second isolator section.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A non-reciprocal section for use with a circulator, comprising:
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a first isolator section and a second isolator section; and
a deflecting device being positioned between the first isolator section and the second isolator section;
whereinsaid deflecting device is a dovetail prism so that two backward light beams which are divergently outward deflected, may be convergently inward deflected toward each(other after passing the deflecting device. - View Dependent Claims (11)
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12. A method for providing two different paths transmitting a backward light beam and a forward light beam, respectively, comprising steps of:
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providing first mechanism including means for significantly splitting a backward light beam into two backward rays;
providing second means for rejoining said two backward rays into one;
providing third mechanism including means for reflecting the split backward rays before said backward rays enter the second mechanism; and
defining a forward path and a backward path in said first mechanism, said second mechanism and said third mechanism for allowing the forward light beam and the backward light beam to travel therealong;
wherein the forward path and the backward path are different from each other and the forward path is deflected less than the backward path with regard to an imaginary center line along an axial direction of a combination of said first mechanism and second mechanism;
whereinsaid third mechanism is positioned between said first mechanism and said second mechanism for reflecting two rays from an outward divergent manner to an inward convergent manner and toward each other. - View Dependent Claims (13, 14, 15)
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16. A method for providing two different paths transmitting a backward light beam and a forward light beam, respectively, comprising steps of:
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providing a first birefringent wedge and a second birefringent wedge to have an E-ray and an O-ray of a backward light beam in the first birefringent wedge respectively converted to be the O-ray and an E-ray in the second birefringent wedge, so as to significantly split the backward light beam into two backward rays; and
providing a third birefringent wedge and a fourth birefringent wedge to have the O-ray and the E-ray of the backward light beam in the third birefringent wedge respectively converted to be the E-ray and the O-ray in the fourth birefringent wedge so as to significantly rejoin said two backward rays into one. - View Dependent Claims (17, 18)
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19. A circulator comprising:
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at least three ports including first, second and third ports wherein light may enter from the first port and leave from the second port, or may enter from the second port and leave from the third port;
a first birefringent wedge defining a first optic axis;
a second birefringent wedge defining a second optic axis opposite to said first optic axis with regard to one selected axis;
a third birefringent wedge defining a third optic axis perpendicular to said second optic axis; and
a fourth birefringent wedge defining a fourth optic axis opposite to said third optic axis with regard to the same selected axis. - View Dependent Claims (20, 21, 22, 23)
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24. A circulator comprising:
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at least three ports including first, second and third ports wherein light may enter from the first port and leave from the second port, or may enter from the second port and leave from the third port;
a first birefringent wedge and a reversely positioned second birefringent wedge having a same configuration as the first birefringent wedge and cooperating with the first birefringent wedge sandwiching a first rotator therebetween; and
a third birefringent wedge and a reversely positioned fourth birefringent wedge having the same configuration as the third birefringent wedge and cooperating with the third birefringent wedge sandwiching a rotator therebetween;
whereinthe second birefringent wedge and the third birefringent wedge are reversely positioned with each other. - View Dependent Claims (25)
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Specification