Many Active Countermeasures are available:

Pyrotechnics

•           Obscurant  Grenades (Multi-band: 66- millimeter smoke MBS; Phosphorus: L8A3)

•           Flamethrower (burning diesel)

Non-Pyrotechnic

•            Lamps: MIRS, CERMAC

Narrowband Pulsed and CW Lasers

•            Ultraviolet (200-400 nm)

•            Visible (400-800 nm)

•            Mid-IR (800-5000 nm): Low and High PRF; Repeater: Fast, Damn Fast; Beamrider

•            Far IR ( > 5000 nm)

•            False Target Generator; Universal Semi-Active-Laser-Guidance Jammer