Air laser properties Directional emission, well defined modes
{"Image DocumentName": "Air laser properties Directional emission, well defined modes", "Image ImageDescription": "Spatial coherence: diffraction limited. Lasing threshold. Gain narrowing. Exponential Gain: high optical gain (60cm-1) Coherence length: gain medium length. Bandwidth limited pulses (10-20ps) LASER - Light Amplification by Stimulated Emission of Radiation. The resonator cavity helps, but is not required if gain is high enough! Siegman uses the term mirrorless lasers Examples: X-ray lasers, dye laser amplifiers, Raman laser, pulsed excimer laser, interstellar masers, nitrogen and hydrogen molecular lasers.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}