US 12,124,096 B2
Optical device and optical system
Tetsuya Shibata, Tokyo (JP); Hideaki Fukuzawa, Tokyo (JP); Tomohito Mizuno, Tokyo (JP); and Masahiro Shinkai, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Jan. 12, 2024, as Appl. No. 18/411,575.
Application 18/411,575 is a continuation of application No. 17/693,558, filed on Mar. 14, 2022, granted, now 11,953,742.
Claims priority of application No. 2021-056794 (JP), filed on Mar. 30, 2021; and application No. 2021-206032 (JP), filed on Dec. 20, 2021.
Prior Publication US 2024/0151919 A1, May 9, 2024
Int. Cl. G02B 6/42 (2006.01); G02B 6/43 (2006.01)
CPC G02B 6/4296 (2013.01) [G02B 6/4274 (2013.01); G02B 6/43 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An optical device comprising:
at least one magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer;
a laser diode; and
a waveguide, wherein
the waveguide includes at least one input waveguide optically connected to the laser diode, an output waveguide connected to the input waveguide and a monitoring waveguide which is connected to at least one of the input waveguide and the output waveguide, and
at least some of light output from the output waveguide and reflected by an object to be irradiated is applied to the magnetic element via the monitoring waveguide.