A high‐pressure laminar flow, methane‐filled Raman cell has been used for nonlinear conversion of a 100‐Hz Nd‐YAG laser operating at 1.06 μm to eye‐safe radiation at 1.54 μm. The laminar flow is obtained between two concentric cylinders rotating at the same angular velocity. Using a noncritically phase‐matched optical parametric oscillator, the same laser source was also converted to 1.57 μm eye‐safe radiation. Pump recirculation was used in both cases. Good conversion efficiencies, almost independent of the pulse repetition rate, were obtained with both conversion techniques. © 1996 Society of Photo−Optical Instrumentation Engineers.