[20p-E203-7~19] 3.5 Laser system and materials

[20p-E203-16] Stabilization of Optically Pumped Twin-type Far Infrared Laser Using an Isolator

〇Kazuya Nakayama¹, Shigeki Okajima¹, Kenji Tanaka², Ryo Yasuhara², Kazuo Kawahata² (1.Chubu Univ., 2.NIFS)

Keywords:Far infrared laser, Interferometry

For future fusion plasma diagnostics, we have developed a 48-μm and 57-μm CH₃OD laser pumped by 9R(8) CO₂ laser. The far-infrared (FIR) laser device is a twin type having two laser tubes (probe light and local light) for application to heterodyne interferometry. In this study, we have stabilized the output and beat frequency of the two-color FIR laser by reducing the return of the pump light with an optical isolator.