What are these kind of beam weapons used by Ghoul Investigators?
By the looks of the first image, it must be Narukami:


  Narukami (ナルカミ, Narukami) is an ukaku-type quinque. It discharges condensed Rc cells just like lightning bolts. Possessing a tracking function, evasion of the bolts is next to impossible.


And for the second image, it is the Higher Mind:


  Higher Mind (ハイアーマインド（高次精神次元）, Haiā Maindo) or Angel Beat (天使の羽ばたき（エンジェルビート）, Enjeru Bīto) is an ukaku-type quinque that shoots beams of concentrated energy or condensed Rc cells.