US 11,870,201 B2
Fiber optic device operational monitoring
Xiang Peng, San Ramon, CA (US); I-Ning Hu, Sunnyvale, CA (US); Michael Mielke, Franklin, MA (US); and Boris Kharlamov, Jacksonville, FL (US)
Assigned to Lumentum Operations LLC, San Jose, CA (US)
Filed by Lumentum Operations LLC, San Jose, CA (US)
Filed on Sep. 2, 2021, as Appl. No. 17/446,736.
Application 17/446,736 is a continuation of application No. 16/260,892, filed on Jan. 29, 2019, granted, now 11,114,809.
Claims priority of provisional application 62/633,890, filed on Feb. 22, 2018.
Prior Publication US 2021/0399513 A1, Dec. 23, 2021
Int. Cl. H01S 3/067 (2006.01); H01S 3/00 (2006.01); G01M 11/00 (2006.01)
CPC H01S 3/0014 (2013.01) [G01M 11/30 (2013.01); H01S 3/067 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical device included in a high-power fiber laser, the optical device comprising:
a plurality of optical components comprising:
a group of input fibers,
a tapered waveguide,
a splice,
an output fiber attachment component, and
an output fiber; and
a set of sensor components, the set of sensor components comprising:
at least one degradation sensor associated with a degradation property, the at least one degradation sensor comprising:
a photodiode arranged to measure scattered light at or near the output fiber attachment component;
a stress sensor arranged to measure stress at or near the output fiber attachment component; or
a camera arranged to identify hot spots at or near at least one of the tapered waveguide, the splice, or the output fiber attachment component; and
at least one health sensor associated with a health property, the at least one health sensor comprising:
a temperature sensor and a power monitor arranged to measure optical power associated with at least one of the tapered waveguide or the splice; or
a photodiode arranged to measure scattered light at or near at least one of the group of input fibers or the output fiber; and
wherein at least one of the set of sensor components is configured to provide sensor output to an operational monitor associated with the optical device.