US 11,722,237 B2
Optical pass-through link training
Mir Ashkan Seyedi, Milpitas, CA (US)
Assigned to Hewlett Packard Enterprise Development LP, Spring, TX (US)
Filed by HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP, Houston, TX (US)
Filed on Oct. 6, 2021, as Appl. No. 17/495,789.
Prior Publication US 2023/0106030 A1, Apr. 6, 2023
Int. Cl. H04J 14/02 (2006.01); H04B 10/50 (2013.01); H04B 10/60 (2013.01); H04B 10/25 (2013.01); G02B 6/293 (2006.01); G02B 6/12 (2006.01)
CPC H04J 14/0227 (2013.01) [H04B 10/25 (2013.01); H04B 10/50 (2013.01); H04B 10/60 (2013.01); G02B 6/12007 (2013.01); G02B 6/2938 (2013.01); G02B 6/29338 (2013.01); G02B 6/29395 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for optical pass-through (OPT) link training, the method comprising:
receiving, at a first optical ring filter, from a transmit node, a first bit pattern transmitted on a first wavelength and a second bit pattern transmitted on a second wavelength;
detecting, at the first optical ring filter, each of the first and second wavelengths based on corresponding bias voltages registered by an integrated thermal resonance wavelength controller of the first optical ring filter;
tuning a resonance wavelength of the first optical ring filter to a detected wavelength associated with a lower bias voltage, the detected wavelength being one of the first wavelength or the second wavelength;
determining whether a first receive node connected to the first optical ring filter matches an intended destination endpoint for signals received from the transmit node at the tuned resonance wavelength; and
generating a wavelength routing map based at least in part upon whether the first received node matches the intended destination endpoint.