US 12,468,099 B2
Polarization diverse receiver with delays
John Fini, Albany, CA (US); Anatol Khilo, Lexington, MA (US); Chen Sun, Berkeley, CA (US); Pavan Bhargava, Berkeley, CA (US); and Chandarasekaran Ramamurthy, Chandler, AZ (US)
Assigned to Ayar Labs, Inc., San Jose, CA (US)
Filed by Ayar Labs, Inc., Santa Clara, CA (US)
Filed on May 20, 2024, as Appl. No. 18/669,500.
Application 18/669,500 is a continuation of application No. 18/165,278, filed on Feb. 6, 2023, granted, now 11,988,881.
Claims priority of provisional application 63/307,588, filed on Feb. 7, 2022.
Prior Publication US 2024/0302609 A1, Sep. 12, 2024
Int. Cl. G02B 6/293 (2006.01); G02B 6/42 (2006.01); H04B 10/60 (2013.01); H04B 10/67 (2013.01)
CPC G02B 6/4215 (2013.01) [G02B 6/29335 (2013.01); G02B 6/29338 (2013.01); G02B 6/2938 (2013.01); G02B 6/29395 (2013.01); G02B 6/4213 (2013.01); H04B 10/60 (2013.01); H04B 10/671 (2013.01); G02B 6/29343 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electro-optic receiver, comprising:
an optical data bus waveguide connected to convey a first portion of incoming light in a first direction through the optical data bus waveguide and to convey a second portion of incoming light in a second direction through the optical data bus waveguide; and
a wavelength division multiplexed receiver row formed along the optical data bus waveguide, the wavelength division multiplexed receiver row including a first plurality of circuit unit cells placed side-by-side along a first half of the wavelength division multiplexed receiver row and a second plurality of circuit unit cells placed side-by-side along a second half of the wavelength division multiplexed receiver row, each of the first and second pluralities of circuit unit cells including a respective microring resonator positioned to optically couple to the optical data bus waveguide, each of the first and second pluralities of circuit unit cells including a respective optical waveguide positioned to optically couple to the respective microring resonator, each of the first and second pluralities of circuit unit cells including a respective photodetector, the respective optical waveguide including a first portion that extends in a first direction away from a location of optical coupling of the respective optical waveguide with the respective microring resonator, the respective optical waveguide including a second portion that extends in a second direction away from the location of optical coupling of the respective optical waveguide with the respective microring resonator, the first portion of the respective optical waveguide extending along a first optical path length from a location of the respective microring resonator to the respective photodetector, the second portion of the respective optical waveguide extending along a second optical path length from the location of the respective microring resonator to the respective photodetector, the first optical path length and the second optical path length sized to provide for substantially simultaneous arrival of the first portion of incoming light and the second portion of incoming light at the respective photodetector, wherein respective ones of the first and second pluralities of circuit unit cells have mirrored configurations such that the second half of the wavelength division multiplexed receiver row is a mirrored version of the first half of the wavelength division multiplexed receiver row.