[11a-Z16-1~9] 4.3 Lasers and laser materials processing

▼ [11a-Z16-7] Development of a fast wavelength switchable external cavity semiconductor laser

〇Sota Mine¹, Kodo Kawase¹, Kosuke Murate¹ (1.Nagoya Univ.)

Keywords:External-cavity diode laser, Digital micromirror device

We developed a fast wavelength switchable external cavity diode laser (ECDL) using a DMD as a seed laser for an injection-seeded terahertz (THz) wave parametric generator (is-TPG). Generally, the wavelength of an ECDL is selected by the angle of the mirror or grating; however, in this case, a DMD is used as the wavelength selector. A power output of 300 mW and a tunable range of 10.6 nm were obtained. Furthermore, high-rate modulation at 6.55kHz was realized. This laser makes it possible to switch the THz wavelengths of is-TPG rapidly to match the absorption spectrum of a reagent.