US 12,222,551 B2
Variable optical attenuator arrays
Driss Touahri, Nepean (CA); Joshua Benjamin Julius Philipson, Ottawa (CA); Christopher Russell Wagner, Kanata (CA); Luis Andre Neves Paiva Fernandes, Maia (PT); and Robert Matthew Adams, Ottawa (CA)
Assigned to VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed by VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed on Sep. 6, 2022, as Appl. No. 17/903,401.
Prior Publication US 2024/0077678 A1, Mar. 7, 2024
Int. Cl. G02B 6/26 (2006.01); G02B 6/27 (2006.01); G02B 6/35 (2006.01); G02B 26/02 (2006.01); G02B 6/12 (2006.01)
CPC G02B 6/266 (2013.01) [G02B 6/2726 (2013.01); G02B 6/3574 (2013.01); G02B 26/023 (2013.01); G02B 2006/12109 (2013.01); G02B 2006/12114 (2013.01); G02B 2006/12116 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A variable optical attenuator (VOA) apparatus, comprising:
an enclosure;
a first collimator positioned on a first surface of the enclosure and coupled to an input optical fiber;
a second collimator positioned on the first surface of the enclosure and coupled to an output optical fiber;
a retroreflector within the enclosure to receive a light beam from the first collimator and reflect the light beam to the second collimator;
a first attenuation element positioned between the first collimator and the retroreflector within the enclosure to provide variable attenuation to the light beam;
a second attenuation element positioned between the retroreflector and the second collimator within the enclosure; and
at least one adjustment element within the enclosure to move the first attenuation element and the second attenuation element.