Howard John Baker

Professor Baker received B.Sc.in Physics and Ph.D. in Laser Physics from Manchester University. Postdoctoral research at Manchester was on pulsed iodine photo-dissociation lasers. In 1980, he became a Lecturer in Applied Physics at Hull University, with research on mercury halide and TEA CO₂ lasers and magnetic switching circuits for electrical pulse generation. In 1987, he became Senior Lecturer in Physics at Heriot-Watt University allowing research specialisation in both laser physics and laser engineering. He played a leading role in development of scalable lasers with RF discharge excitation, and CO₂ planar waveguide and array lasers were pioneered. The work aided the establishment of a currently successful laser manufacturer in the UK. This expertise in the new CO₂ laser technology led to applications research on laser drilling of circuit boards, machining of unfired LTCC ceramic laminations and precision micro-machining and polishing of silica optics.

His main laser technology interest has been in high power diode lasers, used directly or as pump units for solid-state lasers. A novel diode pumping scheme led to world-leading performance from planar waveguide solid-state lasers. He devised a new technique for fabricating optics to correct the poor beam quality of diode laser bars, combining a novel wavefront measurement technique with custom laser micro-machining. He co-founded PowerPhotonic Ltd, aimed at commercialising this process. Current research continues on the use of laser direct-writing techniques in optics manufacture, and application of laser-cut optics in the general area of high average power industrial diode lasers. A new area is ceramic technology research on vacuum sintered, transparent laser materials for solid-state laser amplifiers and laser-machined LTTC ceramic substrate technology for diode laser packaging. 

Howard is part of the EPSRC Centre for Innovative Manufacturing in Laser-based Production Processes.