US 11,695,493 B1
System and methods for time and frequency division passive optical network
Junwen Zhang, Broomfield, CO (US); Zhensheng Jia, Superior, CO (US); Mu Xu, Broomfield, CO (US); Haipeng Zhang, Broomfield, CO (US); and Luis Alberto Campos, Superior, CO (US)
Assigned to Cable Television Laboratories, Inc., Louisville, CO (US)
Filed by CABLE TELEVISION LABORATORIES, INC., Louisville, CO (US)
Filed on Feb. 28, 2022, as Appl. No. 17/682,993.
Application 17/682,993 is a continuation of application No. 16/877,439, filed on May 18, 2020, granted, now 11,265,099.
Claims priority of provisional application 62/849,737, filed on May 17, 2019.
Int. Cl. H04J 14/00 (2006.01); H04J 14/02 (2006.01)
CPC H04J 14/0282 (2013.01) [H04J 14/025 (2013.01); H04J 14/0246 (2013.01); H04J 14/0247 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A coherent optical receiver, comprising:
an integrated coherent receiver (ICR) configured to coherently detect a first optical frequency sub-band of a multiple-band optical source;
a local oscillator (LO) in operable communication with the ICR, and having an LO center frequency; and
a processor including (i) an analog-to-digital converter (ADC) configured to convert the detected first optical frequency sub-band into a first received digital signal, (ii) a signal recovery unit configured to recover a first data stream from the first received digital signal, (iii) a decoding unit configured to decode the recovered first data stream and output a first processed data signal corresponding to the first optical frequency sub-band,
wherein the ICR is further configured to coherently detect K sub-bands of the multiple-band optical source, K being an integer greater than or equal to 1,
wherein the multiple-band optical source has a first receiver bandwidth, and
wherein the receiver is configured with a second receiver bandwidth less than the first receiver bandwidth.