System and method for coherent receivers with PCSELS emitting in two directions
Embodiments of the present disclosure may comprise a coherent optical receiver, where the coherent optical receiver comprises a PCSEL that generates a first and a second light beam. In accordance with various embodiments, the physical emission direction of the first light beam may be at an angle of 180 degrees, or 180 degrees plus/minus 10 degrees in some instances, to the physical emission direction of the second light beam. Embodiments may also comprise a first hybrid receiver that receives a first portion of an input light signal to the coherent optical receiver and the first light beam as a local oscillator signal, generating one or more first optical hybrid receiver output signals. Embodiments may also comprise a second hybrid receiver that receives a second portion of the input light signal to the coherent optical receiver and the second light beam as a local oscillator signal, generating one or more second optical hybrid receiver output signals.
1 . A coherent optical receiver, said coherent optical receiver comprising:
a PCSEL generating a first and a second light beam, wherein a physical emission direction of said first light beam is at an angle of approximately 180 degrees to a physical emission direction of said second light beam;
a first hybrid receiver receiving a first portion of an input light signal to said coherent optical receiver and said first light beam as a local oscillator signal, generating one or more first optical hybrid receiver output signals;
a second hybrid receiver receiving a second portion of said input light signal to said coherent optical receiver and said second light beam as a local oscillator signal, generating one or more second optical hybrid receiver output signals; and
a signal processing unit operable to convert said first optical hybrid receiver output signals and/or said second optical hybrid receiver output signals to electrical signals.
2 . The system of claim 1 , wherein said received first light beam is rotated and/or polarized with respect to said input light signal.
3 . The system of claim 1 , wherein said received second light beam signal is rotated and/or polarized with respect to said input light signal.
4 . The system of claim 1 , wherein said angle is substantially 180 degrees.
5 . The system of claim 1 , wherein said coherent optical receiver comprises one or more polarizers and/or rotators.
6 . The system of claim 1 , wherein either or both of said received first portion of said input light signal or said received second portion of said input light signal is rotated and/or polarized with respect to said first light beam or said second light beam generated at said PCSEL.
7 . The system of claim 1 , wherein said signal processing unit comprises one or more analog-to-digital converters.
8 . The system of claim 1 , wherein said signal processing unit comprises a digital signal processor.
9 . The system of claim 1 , wherein said electrical signals are digitized.
10 . The system of claim 1 , wherein said electrical signals represent information extracted from said input light.
11 . A method for coherent optical receiving, said method comprising:
generating a first and a second light beam using a PCSEL, wherein a physical emission direction of said first light beam is at an angle of approximately 180 degrees to a physical emission direction of said second light beam;
receiving at a first hybrid receiver a first portion of an input light signal and said first light beam as a local oscillator signal, generating one or more first optical hybrid receiver output signals;
receiving at a second hybrid receiver a second portion of said input light signal and said second light beam as a local oscillator signal, generating one or more second optical hybrid receiver output signals; and
converting said first optical hybrid receiver output signals and/or said second optical hybrid receiver output signals to electrical signals at a signal processing unit.
12 . The method of claim 11 , comprising rotating and/or polarizing said received first light beam with respect to said input light signal.
13 . The method of claim 11 , comprising rotating and/or polarizing said received second light beam with respect to said input light signal.
14 . The method of claim 11 , wherein said angle is substantially 180 degrees.
15 . The method of claim 11 , comprising polarizing and/or rotating one or more optical beams.
16 . The method of claim 11 , comprising rotating and/or polarizing said received first portion of said input light signal and/or said received second portion of said input light signal with respect to said first light beam or said second light beam generated at said PCSEL.
17 . The method of claim 11 , comprising analog-to-digital converting in said signal processing unit.
18 . The method of claim 11 , comprising digital signal processing in said signal processing unit.
19 . The method of claim 11 , comprising digitizing said electrical signals.
20 . The method of claim 11 , comprising extracting information from said input light and representing said information in said electrical signals.