Cr+4:Y3Al5O12 or Cr+4:YAG (Yttrium Aluminum Garnet) - is a material that can be used as an active media for CW, pulsed or self mode-locked tunable NIR solid-state lasers with tunability range 1340 - 1580 nm as well as a media for Q-switching in lasers with operating wavelength at 950 - 1100 nm. Cr+4:Y3Al5O12 or Cr+4:YAG (Yttrium Aluminum Garnet) is particularly useful in practical applications because of convenient absorption band of Cr+4 around 1 mm which gives possibilities to pump it by regular Nd:YAG lasers. A saturation of absorption in the band at 1060 nm is useful for application in small sized Nd:YAG oscillators with flash lamp or laser diode pumping instead of based on dye or LiF:F-center Cr+4:YAG (Yttrium Aluminum Garnet) crystal passive Q-switches. Using the Cr+4:YAG (Yttrium Aluminum Garnet) crystal the self mode-locking (KML) regime is achievable. It gives an opportunity to build the laser source with pulse duration shorter then 100 fs at 1450 - 1580 nm.