US 12,436,328 B2
Stepped structure optical filter
William D. Houck, Santa Rosa, CA (US); and Steven Saxe, Santa Rosa, CA (US)
Assigned to VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed by VIAVI Solutions Inc., Chandler, AZ (US)
Filed on Nov. 30, 2023, as Appl. No. 18/523,975.
Application 18/523,975 is a continuation of application No. 17/249,872, filed on Mar. 17, 2021, granted, now 11,892,664.
Application 17/249,872 is a continuation of application No. 16/179,480, filed on Nov. 2, 2018, granted, now 10,962,694, issued on Mar. 30, 2021.
Prior Publication US 2024/0094450 A1, Mar. 21, 2024
Int. Cl. G02B 5/26 (2006.01); G02B 5/08 (2006.01); H10F 39/00 (2025.01)
CPC G02B 5/26 (2013.01) [G02B 5/0816 (2013.01); H10F 39/024 (2025.01); H10F 39/8067 (2025.01)] 20 Claims
OG exemplary drawing
 
1. A filter comprising:
a substrate;
a first mirror comprising a stepped surface of the first mirror;
a monolithic spacer disposed on the stepped surface of the first mirror; and
a second mirror disposed on a flat surface of the monolithic spacer,
wherein the first mirror and the second mirror sandwich at least a portion of the monolithic spacer, and
wherein the stepped surface of the first mirror is between the substrate and the second mirror.