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US 8,478,132 B1Granted
Systems and methods for reducing mechanical sensitivity of phase sensitive optical signals
AssigneeRockwell Collins, Inc.
InventorsKim S. Jepsen, Raymond Zanoni, Mark A. La Liberte, Alistair J. Price, Peter J. Morgan
Life of this patent
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Abstract
The present invention is an optical system configured for enabling co-transmission (ex.—co-propagation) of a reference signal and a carrier signal (ex.—or a phase encoded signal and a reference signal) in a same fiber. Since it is configured for enabling said co-transmission, the optical system of the present invention promotes reduced transmission microphonic sensitivity in the optical system.
Claims17
An optical system, comprising:
- a laser device, the laser device configured for transmitting a laser signal;
- a first polarization beam combiner, the first polarization beam combiner being connected to the laser device via a first polarization maintaining fiber portion, the first polarization maintaining fiber portion implementing a forty-five degree polarization maintaining splice, the forty-five degree polarization maintaining splice configured for splitting the laser signal to provide a carrier signal and a reference signal to the first polarization beam combiner via the first polarization maintaining fiber portion;
- a data encoder, the data encoder being connected to the first polarization beam combiner via a second polarization maintaining fiber portion, the data encoder configured for receiving the carrier signal from the first polarization beam combiner via the second polarization maintaining fiber portion, the data encoder configured for providing a phase encoded signal based upon the received carrier signal;
- and
- a second polarization beam combiner, the second polarization beam combiner being connected to the data encoder via a third polarization maintaining fiber portion, the second polarization beam combiner being connected to the first polarization beam combiner via a fourth polarization maintaining fiber portion, the second polarization beam combiner configured for receiving the phase encoded signal from the data encoder via the third polarization maintaining fiber portion, the second polarization beam combiner being configured for receiving the reference signal from the first polarization beam combiner via the fourth polarization maintaining fiber portion.
2 more elements
A method for optical signal routing in an optical system, said method comprising:
- transmitting an optical signal from a signal generating device onto a first PM fiber portion;
- directing the transmitted optical signal, via the first PM fiber portion, to a first PM circulator, the first PM circulator comprising at least one of:
- a forty-five degree PM splice and a ninety degree PM splice;
- splitting the transmitted optical signal via the first PM circulator, to produce a carrier signal and a reference signal;
- directing the carrier signal and the reference signal from the first PM circulator to a first polarization-maintaining component via the first PM fiber portion;
- and
- transmitting the carrier signal from the first polarization-maintaining component to a data encoder via a second PM fiber portion.
4 more elements
A method for optical signal routing in an optical system, said method comprising:
- transmitting an optical signal from a signal generating device to a signal splitting component via a first polarization-maintaining (PM) fiber portion;
- splitting the optical signal, via the signal splitting component, into a reference signal and a carrier signal;
- transmitting the carrier signal from the signal splitting component to a data encoder via a second PM fiber portion;
- transmitting the reference signal from the signal splitting component to a first time delay component via a third PM fiber portion;
- producing a phase encoded signal via the data encoder, said phase encoded signal being based upon the carrier signal;
- transmitting the phase encoded signal from the data encoder to a PM component via a fourth PM fiber portion;
- transmitting the reference signal from the first time delay component to the PM component via a fifth PM fiber portion;
- and
- transmitting the phase encoded signal and the reference signal from the PM component to an active demultiplexer via a sixth PM fiber portion.
6 more elements
Dependencies are inferred from the claim text.