Orthogonal band launch for repeaterless systems
AssigneeTyco Electronics Subsea Communications LLC
InventorsLee Richardson, Ekaterina A. Golovchenko, Bamdad Bakhshi
Life of this patent
Estimating the term…
Abstract
Briefly, in accordance with one or more embodiments, a band of signal carriers is divided into a first band of carriers and a second band of carriers. The carriers in the first band comprise shorter wavelength carriers, and carriers in the second band comprise longer wavelength carriers. Each of the optical sources in the first and second bands of carriers are modulated with an input signal and coupled together via a polarization maintaining coupler. These signals are then combined via a polarization beam combiner wherein the first band has a polarization state that is orthogonal, or nearly orthogonal, to a polarization of the second state.
Claims20
An orthogonal band launch transmitter, comprising:
- a first group of optical sources to generate a first band of carriers, and a second group of optical sources to generate a second band of carriers,
- a first plurality of data modulators each associated with a corresponding one of the first group of optical sources to modulate the first band of carriers with input data and form a first band of modulated carriers;
- a second plurality of data modulators each associated with a corresponding one of the second group of optical sources to modulate the second band of carriers with the input data and form a second band of modulated carriers;
- and
- a polarizing beam combiner to combine the first band of modulated carriers with the second band of modulated carriers to provide a combined output signal, wherein the first band of modulated carriers has a polarization state that is orthogonal to a polarization state of the second band of modulated carriers.
A method, comprising:
- dividing a band of signal carriers into a first band of carriers and a second band of carriers, wherein carriers in the first band comprise shorter wavelength carriers, and carriers in the second band comprise longer wavelength carriers;
- modulating each of the first band of carriers with an input signal;
- modulating each of the second band of carriers with the input signal;
- combining the first band of modulated carriers with the second band of modulated carriers into a combined signal, wherein the first band has a polarization state that is orthogonal, or nearly orthogonal, to a polarization of the second state;
- and
- transmitting the combined signal over an optical transmission system.
A repeaterless optical transmission system, comprising:
- an orthogonal band launch transmitter to transmit an optical signal;
- an optical fiber to carry the optical signal transmitted by the orthogonal band launch transmitter;
- and
- a receiver to receive the optical signal from the optical fiber;
- wherein the orthogonal band launch transmitter comprises:
- a first group of optical sources to generate a first band of carriers, and a second group of optical sources to generate a second band of carriers;
- a first plurality of data modulators each associated with a corresponding one of the first group of optical sources to modulate the first band of carriers with input data and form a first band of modulated carriers;
- a second plurality of data modulators each associated with a corresponding one of the second group of optical sources to modulate the second band of carriers with the input data and form a second band of modulated carriers;
- and
- a polarizing beam combiner to combine the first band of modulated carriers with the second band of modulated carriers to provide a combined output signal, wherein the first band of modulated carriers has a polarization state that is orthogonal to a polarization state of the second band of modulated carriers.
Dependencies are inferred from the claim text.