Hybrid laser resonator with special line narrowing

A laser system, comprising:

• a hybrid resonant cavity terminating at one end with a cylindrical mirror and at the other end with a dispersive wavelength selector;
• a gain medium disposed in the resonant cavity;
• a power supply that excites the gain medium to generate a laser beam that oscillates in the resonant cavity, wherein a portion of the laser beam is coupled out of the resonant cavity as an output laser beam;
• the cylindrical mirror having a cylindrical reflecting surface oriented to diverge the laser beam at a first azimuthal angle relative to an axis of the resonant cavity;
• and
• the dispersive wavelength selector disperses the laser beam as a function of wavelength at a second azimuthal angle relative to the resonant cavity axis, the second azimuthal angle is orthogonal to the first azimuthal angle.

An excimer laser, comprising:

• a hybrid resonant cavity that is stable in a first axis and unstable in a second axis orthogonal to the first axis;
• a gain medium disposed in the resonant cavity to generate a laser beam in the resonant cavity, wherein a portion of the laser beam is coupled out of the resonant cavity as an output laser beam;
• and
• a dispersive wavelength selector oriented to disperse the laser beam as a function of wavelength in the first axis.