US 11,695,485 B1
Impairment generation
Antonio Caballero Jambrina, Burlington, MA (US); Miquel Mestre Adrover, Cambridge, MA (US); and Pierre Humblet, Cambridge, MA (US)
Assigned to Acacia Communications, Inc., Maynard, MA (US)
Filed by Acacia Communications, Inc., Maynard, MA (US)
Filed on Jun. 22, 2021, as Appl. No. 17/355,010.
Application 17/355,010 is a continuation of application No. 16/826,955, filed on Mar. 23, 2020, granted, now 10,880,019, issued on Dec. 29, 2020.
Application 16/826,955 is a continuation of application No. 16/285,654, filed on Feb. 26, 2019.
Claims priority of provisional application 62/782,793, filed on Dec. 20, 2018.
Int. Cl. H04B 17/00 (2015.01); H04B 17/391 (2015.01); H04B 17/16 (2015.01); H04B 17/373 (2015.01)
CPC H04B 17/0085 (2013.01) [H04B 17/0087 (2013.01); H04B 17/16 (2015.01); H04B 17/373 (2015.01); H04B 17/3912 (2015.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
generating from an electrical signal, using a coherent optical transceiver comprising one or more components including a digital signal processor (DSP), control circuitry, and a photointegrated circuit (PIC), a light signal of a wavelength of light encoded with coherent optical data impaired with one or more emulated impairments; the coherent optical transceiver enabled to encode an electrical signal coherently on a wavelength of light and decode a coherent data encoded on a wavelength of light to an electrical signal; wherein the optical transceiver encodes the coherent data on the light signal; wherein the one or more emulated impairments are generated by the coherent optical transceiver to emulate impairments that occur during coherent optical communication without the need for specialized equipment; wherein the one or more emulated impairments are included in the light signal; wherein the one or more emulated impairments interfere with the ability to decode the encoded coherent data on the wavelength of light to enable testing of the ability of a coherent optical communication system to handle the emulated impairments; and
looping the light signal from an output of the coherent optical transceiver to an input of the coherent optical transceiver to self test tolerance of the optical transceiver to be able to remove the one or more emulated impairments in the light signal and recover the encoded data.