By coupling a CW CO2 and a TEA CO2 laser through a grating simultaneously used for both resonators, without any additional optical elements, the CW laser radiation was injected without loss into the TEA CO 2 laser optical cavity. Thus, longitudinal and transverse single mode operation of the TEA CO2 laser was achieved successfully without any intracavity limiting apertures an evident by the smooth shape of detected pulses. Furthermore, a 3×3 cm cross section single mode beam with unaffected energy of about 4 J/pulse was obtained. This specially designed array due to its observed spectral coincidence of CW radiation and pulsed emission indicates exact alignment of injected CW radiation with the optical axis of TEA CO2 laser resonator without significant angular deviation. Slight radial deviation, however, did not have any detectable destructive effect on the single mode output signals. This compact and simple structure single mode TEA CO2 laser with its stability and simple adjustability can be very useful particularly for portable units such as atmospheric lidar instruments.
- Tea Co2 LaserInjection LockingSlm