US 11,736,204 B2
Individually routable subcarriers
Kuang-Tsan Wu, San Jose, CA (US); and Matthew L. Mitchell, San Jose, CA (US)
Assigned to Infinera Corporation, San Jose, CA (US)
Filed by Infinera Corporation, San Jose, CA (US)
Filed on Dec. 24, 2021, as Appl. No. 17/561,822.
Application 17/561,822 is a division of application No. 16/870,502, filed on May 8, 2020, granted, now 11,362,738.
Application 16/870,502 is a continuation of application No. 16/155,624, filed on Oct. 9, 2018, granted, now 10,742,328, issued on Aug. 11, 2020.
Claims priority of provisional application 62/569,847, filed on Oct. 9, 2017.
Prior Publication US 2022/0116118 A1, Apr. 14, 2022
Int. Cl. H04B 10/61 (2013.01); H04B 10/40 (2013.01); H04J 14/06 (2006.01); H04B 10/50 (2013.01); H04B 10/548 (2013.01); H04B 10/54 (2013.01); H04J 14/02 (2006.01); H04B 10/67 (2013.01); H04B 10/69 (2013.01)
CPC H04B 10/614 (2013.01) [H04B 10/40 (2013.01); H04B 10/503 (2013.01); H04B 10/541 (2013.01); H04B 10/548 (2013.01); H04B 10/612 (2013.01); H04B 10/616 (2013.01); H04B 10/675 (2013.01); H04B 10/69 (2013.01); H04J 14/0298 (2013.01); H04J 14/06 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A receiver configured for use in a system including a transmitter and another receiver, the transmitter supplying a plurality of Nyquist subcarriers, each carrying a corresponding one of a plurality of signals, each of the plurality of signals being indicative of a corresponding one of a plurality of independent data streams, the receiver comprising:
a polarization beam splitter operable to receive a portion of a first subcarrier of the plurality of Nyquist subcarriers and a portion of a second subcarrier of the plurality of Nyquist subcarriers, the polarization beam splitter having a first output operable to supply a first polarized optical signal having a first polarization and a second output operable to supply a second polarized optical signal having a second polarization, the first polarized signal including first polarization components of the plurality of Nyquist subcarriers and the second polarized signal including second polarization components of the plurality of Nyquist subcarriers;
a tunable local oscillator laser operable to supply a local oscillator signal;
optical hybrid circuitry operable to receive the local oscillator signal and the first and second polarized optical signal and supply a plurality of mixing products, wherein a wavelength of the local oscillator signal is tuned to facilitate beating between one of the first polarization components and one of the second polarization components, said one of the first polarization components and said one of the second polarization components being associated with one of the plurality of Nyquist subcarriers, each of the plurality of Nyquist subcarriers does not spectrally overlap with one another;
detector circuitry operable to receive the mixing products and supply an electrical output;
analog-to-digital conversion circuitry operable to receive the electrical output of the detector circuitry and supply a digital output; and
a digital signal processor operable to output one of the plurality of independent data streams based on the digital output.