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US 2018/0261971 A1Published application
Bidirectional c-band and l-band optical transmission using circulators
AssigneeNEC Laboratories America, Inc.
InventorsFatih YAMAN, Shaoliang ZHANG, Eduardo Mateo RODRIGUEZ, Kohei NAKAMURA, Takanori INOUE, Yoshihisa INADA
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Abstract
Aspects of the present disclosure describe systems, methods, and structures for providing bidirectional C-band and L-band transmission employing optical circulators which advantageously eliminates C\L WDM couplers while still blocking any backward amplified spontaneous emissions from optical amplifiers.
Claims9
An apparatus comprising:
- a first optical waveguide having a first end and a second end;
- a second optical waveguide having a first end and a second end;
- a third optical waveguide having a first end and a second end;
- a fourth optical waveguide having a first end and a second end;
- a first optical circulator, said first circulator in optical communication with the second end of the first optical waveguide, the first end of the third optical waveguide and the first end of the fourth optical waveguide;
- a second optical circulator, said second optical circulator in optical communication with the second end of the third optical waveguide, the second end of the fourth optical waveguide, and the first end of the second optical waveguide,
- a first optical amplifier interposed between the first end and the second end of the third optical waveguide;
- a second optical amplifier interposed between the first end and the second end of the fourth optical waveguide;
- wherein the apparatus is configured such that there are no optical isolators interposed between the circulators and the optical amplifiers.
6 more elements
Dependencies are inferred from the claim text.