Abstract
Q-switched Waveguide $CO_{2}$ laser using polygon mirror were constructed and their output characteristics were measured. Waveguide was made of the beryllium oxide tube of inner diameter of 2 mm, outer diameter of 20 mm, and length of 200 mm. A flat ZnSe output coupler of 80% reflectivity was placed on the 9 mm distance from the end of the waveguide. Convex lens was used to reduce the coupling loss between the polygon mirror and the waveguide. The polygon mirror was located behind of convex lens. With this condition, continuous output of the laser were measured as 1.2 W. In the Q-switched mode. pulse width 120 ns were measured with rotational speed 7,559 RPM. and peak power of up to 250 W. 250 W.
연속출력 1.2W인 도파관 $CO_{2}$레이저를 설계 제작하고 회전 다면경을 이용하여 Q-스위칭 동작시켜 그 특성을 측정하였다. 내경 2mm, 길이 100mm인 BeO튜브를 사용하여 도파관 $CO_{2}$레이저를 제작한 뒤, Q-스위칭을 수행하기 위해서 레이저의 전반사경 위치에 회전 다면경을 설치하였다. 다면경을 7,559RPM으로 회전시킬 때 발생된 Q-스위칭된 레이저의 펄스폭은 120ns이고 각 펄스의 첨두출력은 250W이었다.