Current state of small laser technology

[koreansoup]

I am interested if current laser technology exists such that a small laser can be made that emits non-visible light, is .5cm or less (at it's largest dimension), and can detect at distances of 6ft or greater. Please feel free to direct me to other areas of the forum to direct this question if more applicable.

 

[berkeman]

I am interested if current laser technology exists such that a small laser can be made that emits non-visible light, is .5cm or less (at it's largest dimension), and can detect at distances of 6ft or greater. Please feel free to direct me to other areas of the forum to direct this question if more applicable.

Including the power supply? What kind of battery energy fits in 0.5cm^3? Is that sufficient for you?

 

[Borek]

CR927? SR41?

Edit: Geez, you can't post just the name correctly as it is considered to be capitalized and changed to Cr927...