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Martin Achtenhagen, Ph.D., received his Ph.D. degree in physics in 1996 from the Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland, for his work on gain-coupled DFB laser diodes. After Postdoctoral work at the IBM Zurich Research Laboratory, Zurich, Switzerland, he became a Research Staff Member at IBM Zurich in 1997, and was involved in work on quantum-well semiconductor lasers, with an emphasis on the design and characterization of high-power GaAs-based lasers. By ownership change, in 1997, he became a Research Staff Member at JDS Uniphase, Eatontown, NJ. In 1998, he was on leave for one year at Spectracom to develop a new generation of pump lasers for EDFA applications. He returned to JDS Uniphase to manage the forward-looking group with emphasis on Raman and EDF amplifiers. In 2002, he became a senior research associate at the Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland, and worked on the simulation of long-wavelength vertical-cavity surface-emitting laser diodes. In 2006, he joined Photodigm Inc. as Vice President of Engineering to develop the next generation of reliable grating surface-emitting lasers and high-power distributed feedback reflector lasers. Dr. Achtenhagen serves as an Associate Editor of Optical Fiber Technology. | 