[22a-A402-1~9] 3.4 レーザー装置・材料（旧3.5）

▼ [22a-A402-6] High-power, single-longitudinal-mode Fe:ZnSe laser amplifier injection-seeded by a DFB-QCL at 4.3 μm

〇(D)Enhao Li¹、Hiyori Uehara^1,2、Shigeki Tokita³、Ryo Yasuhara^1,2 (1.SOKENDAI、2.NIFS、3.Kyoto Univ.)

キーワード：mid-infrared laser, Fe:ZnSe, laser amplifier

We will present a high-power, single-longitudinal-mode laser source operating at 4.3 μm. A hybrid laser amplifier design was demonstrated combining a distributed feedback quantum cascade laser with an Fe:ZnSe amplifier. A nearly fourfold power improvement was achieved, indicating the feasibility of realizing power scaling of 4-5 μm mid-IR laser through this hybrid amplifier scheme.