Ultra-stable superconducting cavity maser oscillator
Ultra-violet gas laser
Ultraviolet chemical laser
Ultraviolet radiation induced discharge laser
Unidirectional ring laser apparatus and method
Unstable laser resonator having radial propagation
Unstable optical resonator with off-axis noncentered obscuration
Unstable optical resonator with self-imaging aperture
Unstable resonator laser system
Use of multiple beams from frequency augmented laser radiation