Patent ID: 8701794

Claim:
A high power laser perforating system for providing high power laser energy to locations in a borehole to perforate a casing, the system comprising: a. a source for high powered laser energy capable of providing a high power laser beam having a power greater than about 10 kW; b. an optical fiber for transmitting the laser beam from the high power laser to a perforation location in a borehole; c. the optical fiber in optical communication with a bottom hole assembly for delivering the laser beam to the location on a casing in a borehole to be perforated; and, d. the optical fiber having a means to suppress Stimulated Brillouin Scattering arising from the transmission of the greater than 10 kW laser beam; e. whereby, substantially all power of the high power laser beam is delivered from the bottom hole assembly to the perforation location on the casing.