US 12,237,913 B2
Wavelength-division-multiplexing optical circuit implemented in photonic integrated circuit for optical transmitter
Po Dong, Morganville, NJ (US); and Argishti Melikyan, Marlboro, NJ (US)
Assigned to II-VI DELAWARE, INC., Wilmington, DE (US)
Filed by II-VI DELAWARE, INC., Wilmington, DE (US)
Filed on Feb. 2, 2022, as Appl. No. 17/590,959.
Prior Publication US 2023/0246725 A1, Aug. 3, 2023
Int. Cl. H04J 14/02 (2006.01); H04B 10/50 (2013.01); H04B 10/516 (2013.01); H04J 14/06 (2006.01)
CPC H04J 14/0205 (2013.01) [H04B 10/503 (2013.01); H04B 10/516 (2013.01); H04J 14/0216 (2013.01); H04J 14/06 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An optical circuit for use with a plurality of N continuous wave signals having different wavelengths λN at a channel spacing Δλ from one another, the optical circuit comprising:
a coupling stage being configured to combine the continuous wave signals to produce combined signal sets having separate groups of the different wavelengths;
a modulation stage being configured to modulate the combined signal sets to produce modulated signal sets; and
a polarization rotator and combiner (PRC) stage, disposed in optical communication with the modulation stage, configured to combine the modulated signal sets into at least one output signal having a first of the modulated signal sets at a first polarization combined with a second of the modulated signal sets at a second polarization orthogonal to the first polarization.