US 12,078,529 B2
Low noise optical assembly
Colin Smith, Paignton (GB)
Assigned to Lumentum Operations LLC, San Jose, CA (US)
Filed by Lumentum Operations LLC, San Jose, CA (US)
Filed on Sep. 23, 2022, as Appl. No. 17/934,754.
Claims priority of provisional application 63/369,866, filed on Jul. 29, 2022.
Prior Publication US 2024/0035880 A1, Feb. 1, 2024
Int. Cl. G01J 1/02 (2006.01); G01J 1/42 (2006.01); G02B 27/14 (2006.01)
CPC G01J 1/0295 (2013.01) [G01J 1/4257 (2013.01); G02B 27/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical assembly, comprising:
an optical power monitor to receive a portion of an optical beam and to perform a measurement on the portion of the optical beam;
an optical tap to tap the optical beam and to provide the portion of the optical beam; and
an optical element to allow the portion of the optical beam from the optical tap to propagate toward the optical power monitor,
wherein the optical element includes an absorptive material to absorb light other than the portion of the optical beam that is propagated toward the optical power monitor, and
wherein the optical element is configured to direct the portion of the optical beam toward the optical power monitor without the portion of the optical beam propagating through the optical element.