A gaseous fuel-oxygen burner, comprising: a flame zone in which combustion of gaseous fuel and oxygen occurs to form a flame; at least three coaxial gaseous fuel jets (114-1, 114-2,..., 114-N, 214) positioned radially around a central axis of the burner; and coaxial oxygen jets (104-1, 104-2,..., 104-K, 204-1, 204-2,..., 204-K) positioned radially around and outside of each respective one of the at least three gaseous fuel jets (114-1, 114-2,..., 114-N, 214) configured to provide the flame zone with oxygen, wherein a center of each respective gaseous fuel jets (114-1, 114-2,..., 114-N, 214) is a same distance from each of the oxygen jets (104-1, 104-2,..., 104-K, 204-1, 204-2,..., 204-K) positioned radially around and outside of that respective gaseous fuel jet; a plurality of openings (220-1, 220-2,..., 220-L) adjacent the oxygen jets (204-1, 204-2,..., 204-K) to receive a portion of the oxygen from the oxygen jets (204-1, 204-2,..., 204-K) before the oxygen from the oxygen jets (204-1, 204-2,..., 204-K) enters the flame zone; wherein the coaxial gaseous fuel jets (114-1, 114-2,..., 114-N, 214) and the coaxial oxygen jets are separate such that the gaseous fuel from the coaxial gaseous fuel jets (114-1, 114-2,..., 114-N, 214) and the oxygen from the oxygen jets (104-1, 104-2,..., 104-K, 204-1, 204-2,..., 204-K) do not mix before entering the flame zone, wherein the oxygen from the coaxial oxygen jets (104-1, 104-2,..., 104-K, 204-1, 204-2,..., 204-K) enters the flame zone in a uniform annular distribution about openings (106-1, 106-2,..., 106-N, 206) of the gaseous fuel jets (114-1, 114-2,..., 114-N, 214), which can cool the gaseous fuel jets (114-1, 114-2,..., 114-N, 214) and prevent a flame formed in the flame zone from attaching to the fuel jets (114-1, 114-2,...,114-N, 214). a flame zone in which combustion of gaseous fuel and oxygen occurs to form a flame; at least three coaxial gaseous fuel jets (114-1, 114-2,..., 114-N, 214) positioned radially around a central axis of the burner; and coaxial oxygen jets (104-1, 104-2,..., 104-K, 204-1, 204-2,..., 204-K) positioned radially around and outside of each respective one of the at least three gaseous fuel jets (114-1, 114-2,..., 114-N, 214) configured to provide the flame zone with oxygen, wherein a center of each respective gaseous fuel jets (114-1, 114-2,..., 114-N, 214) is a same distance from each of the oxygen jets (104-1, 104-2,..., 104-K, 204-1, 204-2,..., 204-K) positioned radially around and outside of that respective gaseous fuel jet; a plurality of openings (220-1, 220-2,..., 220-L) adjacent the oxygen jets (204-1, 204-2,..., 204-K) to receive a portion of the oxygen from the oxygen jets (204-1, 204-2,..., 204-K) before the oxygen from the oxygen jets (204-1, 204-2,..., 204-K) enters the flame zone; wherein the coaxial gaseous fuel jets (114-1, 114-2,..., 114-N, 214) and the coaxial oxygen jets are separate such that the gaseous fuel from the coaxial gaseous fuel jets (114-1, 114-2,..., 114-N, 214) and the oxygen from the oxygen jets (104-1, 104-2,..., 104-K, 204-1, 204-2,..., 204-K) do not mix before entering the flame zone, wherein the oxygen from the coaxial oxygen jets (104-1, 104-2,..., 104-K, 204-1, 204-2,..., 204-K) enters the flame zone in a uniform annular distribution about openings (106-1, 106-2,..., 106-N, 206) of the gaseous fuel jets (114-1, 114-2,..., 114-N, 214), which can cool the gaseous fuel jets (114-1, 114-2,..., 114-N, 214) and prevent a flame formed in the flame zone from attaching to the fuel jets (114-1, 114-2,...,114-N, 214).