noun
optical resonator; optical cavity
Technical term in optics and laser physics; refers to a structure that confines light by resonant recirculation.
レーザー発振には光共振器が不可欠です。
An optical resonator is essential for laser oscillation.
光共振器のミラー間隔を調整して共振周波数を変える。
Adjust the mirror spacing of the optical cavity to change the resonant frequency.
Compound of 光 (こう, 'light') + 共振器 (きょうしんき, 'resonator'). A straightforward technical calque from English 'optical resonator'.