US 12,032,209 B2
Optical transmission apparatus, optical modulator, and activation method
Kenta Kannari, Sapporo (JP); and Toshio Ishii, Yokohama (JP)
Assigned to FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki (JP)
Filed by FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki (JP)
Filed on Feb. 4, 2022, as Appl. No. 17/592,801.
Claims priority of application No. 2021-057702 (JP), filed on Mar. 30, 2021.
Prior Publication US 2022/0317377 A1, Oct. 6, 2022
Int. Cl. G02B 6/293 (2006.01); G02B 6/12 (2006.01); G02F 1/21 (2006.01)
CPC G02B 6/2935 (2013.01) [G02B 6/12 (2013.01); G02F 1/212 (2021.01); G02B 2006/12135 (2013.01); G02B 2006/12138 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An optical transmission apparatus comprising:
an emitter that emits an optical signal in accordance with a bias current; and
a Mach-Zehnder optical modulator that optically modulates the optical signal in accordance with an electrical signal, wherein
the optical modulator includes
a detector that detects a temperature inside the optical modulator; and
a controller that controls, when detecting activation of a power supply, the temperature inside the optical modulator such that the temperature detected by the detector reaches a target temperature.